Just a suggestion Matt, instead of using vice grips on the lines which you can split that nut or deform it and it will never seal ... Or you can get a set of what they call line wrenches which are specifically designed for brake lines...
Did this on my 86 XJ. Picked up a 95 rebuilt booster and new master cylinder. Ended up making a spacer from a plastic cutting board I got from the dollar store next door to Autozone. Bored out the hole and ground a flat spot to match the old rod. Bent up some lines after getting 2 new nuts to match the new MC and reused the old nuts on the proportioning valve. One of the easier upgrades to the Jeep. This upgrade cut my braking efforts in half. I have 33's and it stops better than it did with factory size tires.
I was kind of hesitant to do the swap. I found this video and after getting the info off this Video as to what models are inter changeable, I was off to the junk yard. Great instruction. Thanks for mentioning what model to pull the parts from to install in our 92 XJ.
Never heard of them, you might want to stay tuned for my 3.5" Junkyard lift that will be coming as soon as the rain and cold goes away. And ya, 3" is noticeable.
Hey Matt. I just adjusted my throttle pedal height for my 89 XJ and took step by step picks of the whole process. I had a hard time finding solutions online so I figured one out myself. I wanted the throttle pedal to be the same height as the brake pedal because the throttle was about 1 1/2 to 2 inches lower than the brake pedal. Let me know if you want the pixs
Just put a 98 ZJ booster on my 88 MJ, had some trouble getting the brake light contactor switch to work again, but all in all went very well. Thanks for the tutorial!
bleepinjeep Exactly, alot of trial and error. Even had to bring the Dremel underneath the footwell with me a couple times to fine tune it. Not a comfortable experience, to say the least.
well, I'll let you know as soon as I get the new brake lines on and the system bled. Not that it doesn't stop well now... but when you add bigger tires that is a lot more weight to try and stop. Apparently some people can lock up all four tires on pavement after the upgrade.
You'll need the 95 YJ with the dual diaphragm booster. I think they were only in the late 95's. The XJ booster looks the same but I think the rod is much longer on the YJ.
I just did this swap on my 87 cherokee chief using a 2000 grand cherokee booster and master cylinder. First off it didn't fit. I had to use a grinder and cut out a small rectangle in the pinch seam on the top of the firewall. Then either hoses fit or bolted together. So I had to make them luckly a friend cane over and took care of that for me. As for a simple bolt in swap lol.. in my case it was a full day nightmare. I love the videos though! Keep em commin!
Great video! Been thinking about this for a while on my 91. Would have liked to see before and after test drive tho, we always forget to take before pics every time... Thanks, and cheers!
I had a 95 Ram 1500 with the magnum V8 in it way back when I was much younger (truck was only a couple years old at that time). I had got on it pretty hard and it blew that large vacuum line off the brake booster and it made my brake pedal so hard to press I had to stand on it with both feet digging my back into the seat trying to stop. I ended up having to shift it down into 2nd then 1st (automatic) and ground my tires against the side of a curb trying to stop before I rear-ended a car ahead of me (freaked out and forgot about the emergency brakes lol). It was about 16 years ago when I was 16 years old, I'm 32 now.
It could be the booster, or maybe a bad brake line. The MJ's had some sort of weird proportioning valve on the rear axle that you might want to check out.
After watching this video, it gave me an idea of what I'd like to do to this 1991 model Cherokee that I have, in addition to upgrading to rear disc brakes
Next time pull the front seat out, it helps. I put the booster from my old 97 cherokee in there. It works, but the pedal is ~1" higher than stock. Tons better than the old single diaphragm, or driving around with no power brakes like I was for a while.
I also wanted to add THAT I ASSEMBLED THESE WHEN I WORKED AT CHRYSLER IN THE LATE 80S AND THE BOOSTER PEICE MUST BE TREATED WITH KID GLOVES AS I WAS TOLD THERE IS GLASS PEICES IN THEM WE WOULD SHAKE THEM TO LISTEN FOR ANY RATTLING AND ANY RATTLING MEANT THEY WERE DAMAGED IN SIDE AND NO GOOD.
maybe the same concept but I cant guarantee it. You'll need to find a booster that will bolt right in the same location and have the same length shaft.
Great video. I have a 90 XJ with ABS and I am right in the middle of doing this swap. Only issue I am having is that on the bottom of the proportioning valve there is an extra place for another fitting to go into that I removed. Does this just need to be capped off?
I went to the junkyard and i got everything i needed im going to do this to my 92 xj I got the brake booster and master from a 2000 wj and im also doing disc in my rear 8.8, what I dont understand is at the end of this vid you say something about a washer inside master, could you explain that real quick thanks.
I just had a brand new master cylinder installed in my 88 mj because they were sinking to the floor. After having it installed and bled and everything they still sink to the floor. What could it be?
100 centimeters is one meter (more than a yard) you were measuring millimeters. in meter has 100 centimeters or 1000 millimeters (10 millimeters equal one centimeter)
Did you try to put the original master cylinder on the new booster instead of having to do all of the brake line bending? Seems like trying that first would have been easier.
I'm willing to bet on your hard lines or your soft lines being clogged. Mostly likely rusted out from the inside, and you have a restriction in them causing your brake pedal to be hard to push. (because only x amount of fluid can make it through restriction.) Personally i'd buy all new brakelines and run them from the master/prop valve all the way back to all four wheels. Before this though you could try blowing some compressed air through the lines to try to clean em up. Goodluck!
I have a 93 YJ....and i just got a 93 parts yj, and the master cyl is diff, and has anti lock.....a friend told me this duel filler cap plastic master is better than my old school metal master......and jeepers upgrade to this for the bigger tires.....your thoughts?
I did this on my 89 xj that had the old and rather weird electric Bendix system and now I notice at like 30/40mph I can put my pedal to the floor and not stop well at all, it's pretty scary. Even just driving around the pedal feels squishy. Any suggestions?
I have a 2000 4WD XJ Classic 4.0L Auto. The break padal is hard when pressed. This has been the case since I bought it 3 years ago. I have replaced the Vacum booster, master cylender, proportional valve. Also replaced Front disks with pads and even replaced Calipers. Replaced rear drums and pads, but the problem is still there. What else coudl be the problem. The XJ runs great. There is no Engine Check light. What could be causing the had break padal???
hey bleeping did this mod , got the booster from a 1999 grand Cherokee and it seems that my brakes are now holding pressure?1 only when i have used them for 10mins or so . need some help thanks
I know it's not normal because I have another 2000 XJ Sport that feels normal. I have also owned a '98 before, so I know what normal XJ break pedal feels like. Can the break lines be bad? How do I test for that? When I bought this XJ it had lots of rust and corrrosion underneath. It seems to have been a Winter car in Boston.
I have a 92 XJ and when I pulled the booster out there was no brake switch attached but the end of the rod was flat. Does anyone know if the 92 XJ brake switch is not attached and all I need to do is grind the 95 booster rod eye flat?
Matt, would this work for my1995 yj? I need better/heavier duty brakes. It will nosedive and become squirrely during hard or sudden braking. I will be pulling an old ammo trailer with camping gear and winter time firewood when needed.
bleepinjeep any recommendations at all for a booster? Other than sell the yj and get another xj , do you have any suggestions for a HD or upgraded booster. Also, could the proportioning valve be causing the prior mentioned problems? Any recommendations would help. Due to safety concerns I will put brakes(new axle with brakes) on the trailer. Thank you for any help.
Matt, is it worth it upgrading a 98 TJ 4cyl brake booster to a 2000 XJ booster? I am trying to save all the parts I can from my TJ/XJ projects. Got the XJ completely 100% free with a 4.0 engine is good its got 160k miles on it runs perfectly good. I am putting the 4.0 into my TJ at some point but I want to do some upgrades in the mean while.
Hey! I know this questions seems odd, but is this the same concept for any car? I would like to do a booster conversion on my 68 Volvo 122S B18, so I was wandering if it's the same steps for doing the conversion?
Just did this on my ` 89 MJ. Huge improvement in stopping power. I think i took too much off of the rod though, my brake light. switch seems loose and my brake lights do not work. Any one have any idea how to fix that? **Edit** I should mention that I got the booster and MC from a 99 WJ
timestamp. pretty common on youtube, although usually people type it @4:13, and he really meant to say @3:58 & @4:06. ;) Although youtube timestamps are not accurate to the second.
so how much of an difference is there from the old style to the new. Im a crappy mechanic, so I always want to make sure its worth it before I do anything.. ha ha
Just a suggestion Matt, instead of using vice grips on the lines which you can split that nut or deform it and it will never seal ... Or you can get a set of what they call line wrenches which are specifically designed for brake lines...
Did this on my 86 XJ. Picked up a 95 rebuilt booster and new master cylinder. Ended up making a spacer from a plastic cutting board I got from the dollar store next door to Autozone. Bored out the hole and ground a flat spot to match the old rod. Bent up some lines after getting 2 new nuts to match the new MC and reused the old nuts on the proportioning valve. One of the easier upgrades to the Jeep. This upgrade cut my braking efforts in half. I have 33's and it stops better than it did with factory size tires.
I was kind of hesitant to do the swap. I found this video and after getting the info off this Video as to what models are inter changeable, I was off to the junk yard. Great instruction. Thanks for mentioning what model to pull the parts from to install in our 92 XJ.
Never heard of them, you might want to stay tuned for my 3.5" Junkyard lift that will be coming as soon as the rain and cold goes away. And ya, 3" is noticeable.
Currently in the middle of swapping a 96 master and booster into my 94. Excellent video.
Edit: Finished, brakes much better
Hey Matt. I just adjusted my throttle pedal height for my 89 XJ and took step by step picks of the whole process. I had a hard time finding solutions online so I figured one out myself. I wanted the throttle pedal to be the same height as the brake pedal because the throttle was about 1 1/2 to 2 inches lower than the brake pedal. Let me know if you want the pixs
Just put a 98 ZJ booster on my 88 MJ, had some trouble getting the brake light contactor switch to work again, but all in all went very well. Thanks for the tutorial!
bleepinjeep Exactly, alot of trial and error. Even had to bring the Dremel underneath the footwell with me a couple times to fine tune it. Not a comfortable experience, to say the least.
well, I'll let you know as soon as I get the new brake lines on and the system bled. Not that it doesn't stop well now... but when you add bigger tires that is a lot more weight to try and stop. Apparently some people can lock up all four tires on pavement after the upgrade.
You'll need the 95 YJ with the dual diaphragm booster. I think they were only in the late 95's. The XJ booster looks the same but I think the rod is much longer on the YJ.
I just did this swap on my 87 cherokee chief using a 2000 grand cherokee booster and master cylinder. First off it didn't fit. I had to use a grinder and cut out a small rectangle in the pinch seam on the top of the firewall. Then either hoses fit or bolted together. So I had to make them luckly a friend cane over and took care of that for me. As for a simple bolt in swap lol.. in my case it was a full day nightmare. I love the videos though! Keep em commin!
Great video! Been thinking about this for a while on my 91. Would have liked to see before and after test drive tho, we always forget to take before pics every time... Thanks, and cheers!
I had a 95 Ram 1500 with the magnum V8 in it way back when I was much younger (truck was only a couple years old at that time). I had got on it pretty hard and it blew that large vacuum line off the brake booster and it made my brake pedal so hard to press I had to stand on it with both feet digging my back into the seat trying to stop. I ended up having to shift it down into 2nd then 1st (automatic) and ground my tires against the side of a curb trying to stop before I rear-ended a car ahead of me (freaked out and forgot about the emergency brakes lol). It was about 16 years ago when I was 16 years old, I'm 32 now.
It could be the booster, or maybe a bad brake line. The MJ's had some sort of weird proportioning valve on the rear axle that you might want to check out.
After watching this video, it gave me an idea of what I'd like to do to this 1991 model Cherokee that I have, in addition to upgrading to rear disc brakes
Next time pull the front seat out, it helps.
I put the booster from my old 97 cherokee in there. It works, but the pedal is ~1" higher than stock.
Tons better than the old single diaphragm, or driving around with no power brakes like I was for a while.
Use a 3/8 line wrench! Using vice grips on brake fittings should only be a last resort...that’s mechanics 101
Yeah, I saw that and clicked off the video. The fact that he said to break the brake line nuts with vice grips is super amateur.
check to see if you are getting a good vacuum coming from the line going into the brake booster.
Matt, would this video also apply to a 92' YJ? I know a lot of the parts and pieces in the 4.0L lines are interchangeable. Thanks for the information!
I also wanted to add THAT I ASSEMBLED THESE WHEN I WORKED AT CHRYSLER IN THE LATE 80S AND THE BOOSTER PEICE MUST BE TREATED WITH KID GLOVES AS I WAS TOLD THERE IS GLASS PEICES IN THEM WE WOULD SHAKE THEM TO LISTEN FOR ANY RATTLING AND ANY RATTLING MEANT THEY WERE DAMAGED IN SIDE AND NO GOOD.
Im parting out my 94 and using them for my 88 MJ. I thought I could do this upgrade. BUMMER
Did this with my 89 XJ
and made a huge difference for only $50
maybe the same concept but I cant guarantee it. You'll need to find a booster that will bolt right in the same location and have the same length shaft.
most of these lines were 14mm... guess I'd have to get a whole set.
Great video. I have a 90 XJ with ABS and I am right in the middle of doing this swap. Only issue I am having is that on the bottom of the proportioning valve there is an extra place for another fitting to go into that I removed. Does this just need to be capped off?
I went to the junkyard and i got everything i needed im going to do this to my 92 xj I got the brake booster and master from a 2000 wj and im also doing disc in my rear 8.8, what I dont understand is at the end of this vid you say something about a washer inside master, could you explain that real quick thanks.
I just had a brand new master cylinder installed in my 88 mj because they were sinking to the floor. After having it installed and bled and everything they still sink to the floor. What could it be?
me too, 25 degrees outside though... damn
what size tires do you have? It's probably only an issue with large and heavy A/T and mud tires.
100 centimeters is one meter (more than a yard) you were measuring millimeters. in meter has 100 centimeters or 1000 millimeters (10 millimeters equal one centimeter)
Did you try to put the original master cylinder on the new booster instead of having to do all of the brake line bending? Seems like trying that first would have been easier.
Great job.. !!! funny when you are installing the pedal connection...
You should of used flex steel braid from the master to the prop. valve.
I'm willing to bet on your hard lines or your soft lines being clogged. Mostly likely rusted out from the inside, and you have a restriction in them causing your brake pedal to be hard to push. (because only x amount of fluid can make it through restriction.)
Personally i'd buy all new brakelines and run them from the master/prop valve all the way back to all four wheels.
Before this though you could try blowing some compressed air through the lines to try to clean em up. Goodluck!
yep, its a tight fit.
finally a mod that may produce results
I dont know, seems like you replaced the entire system. How do you know this isnt normal brake tension for an XJ?
FYI 3:50 it's not CM's it's MM's big difference ;P
I have a 93 YJ....and i just got a 93 parts yj, and the master cyl is diff, and has anti lock.....a friend told me this duel filler cap plastic master is better than my old school metal master......and jeepers upgrade to this for the bigger tires.....your thoughts?
I have 31s and found my brakes to actually work better than when i had my 235s i don't know maybe if i went over 33s i could see a difference
I almost swallowed an entire slice of pizza watching that hole get drilled😂..
I had never thought of doin that!
Will that WJ booster system fit a YJ?
0:57 You mean MMs, not CMs.
Ever done a dual master cylinder configuration like the JeepSpeeders do?
dear Matt... 94 grand with drums and I want discs.. What do I need to do for proportioning valve? any help would be great! thanks!
will this mod work the same on a 93 xj? looks like a tight fit with the stock air box. unless this cant be done with the stock air box?
Is that a grand Cherokee master cylinder too
I did this on my 89 xj that had the old and rather weird electric Bendix system and now I notice at like 30/40mph I can put my pedal to the floor and not stop well at all, it's pretty scary. Even just driving around the pedal feels squishy.
Any suggestions?
Got a question.. I have a 1994 jeep Cherokee xj. And I have to change my break booster. What break booster should I get for it?
I have a 91 xj was wondering how this is an upgrade? My brakes work great will they be greater
I have a 2000 4WD XJ Classic 4.0L Auto. The break padal is hard when pressed. This has been the case since I bought it 3 years ago. I have replaced the Vacum booster, master cylender, proportional valve. Also replaced Front disks with pads and even replaced Calipers. Replaced rear drums and pads, but the problem is still there. What else coudl be the problem. The XJ runs great. There is no Engine Check light. What could be causing the had break padal???
hey bleeping did this mod , got the booster from a 1999 grand Cherokee and it seems that my brakes are now holding pressure?1 only when i have used them for 10mins or so . need some help thanks
I know it's not normal because I have another 2000 XJ Sport that feels normal. I have also owned a '98 before, so I know what normal XJ break pedal feels like. Can the break lines be bad? How do I test for that? When I bought this XJ it had lots of rust and corrrosion underneath. It seems to have been a Winter car in Boston.
I knew you would get around to this eventually! nice
I have a 92 XJ and when I pulled the booster out there was no brake switch attached but the end of the rod was flat. Does anyone know if the 92 XJ brake switch is not attached and all I need to do is grind the 95 booster rod eye flat?
My 99 grand Cherokee 4.7 has that little booster I tried to to put upgraded one in and it qont fit at all
Matt or jeepers I'm leo from anaheim ca. Can I put my 87 cherokee trans,transfercase to a 94 cherokee that it's a non 4x4
Matt, would this work for my1995 yj? I need better/heavier duty brakes. It will nosedive and become squirrely during hard or sudden braking. I will be pulling an old ammo trailer with camping gear and winter time firewood when needed.
bleepinjeep any recommendations at all for a booster? Other than sell the yj and get another xj , do you have any suggestions for a HD or upgraded booster. Also, could the proportioning valve be causing the prior mentioned problems? Any recommendations would help. Due to safety concerns I will put brakes(new axle with brakes) on the trailer. Thank you for any help.
Your map is that thing going to stop 42 is on my Jeep what's a good set up to stop these tires
Hi Matt, what happens then to the bendix stock systems? I'm having trouble with the "check antilock" warning always activating.
Matt, is it worth it upgrading a 98 TJ 4cyl brake booster to a 2000 XJ booster? I am trying to save all the parts I can from my TJ/XJ projects. Got the XJ completely 100% free with a 4.0 engine is good its got 160k miles on it runs perfectly good. I am putting the 4.0 into my TJ at some point but I want to do some upgrades in the mean while.
Did u need a swivel on the 4 nuts under the dash? And how do u disconnect the pedal?
Is a double diafram brake booster system, better than the hydro-boost type system for oversized tires ?
nice vid man.. Cant wait to see the junk yard lift good luck!!!!
would that be beneficial for my 00 xj on 33's ?
if not what would be a good way to get better braking power?
I plan on doing this will a brake booster from a 2001 cherokee work in an 87?
nice.!!! that would for sure make it worth it.. hmmm I wonder if 33s fall in line to upgrade,,, hmmm
What’s wrong with the 97-01
is this some kind of code?
Hey! I know this questions seems odd, but is this the same concept for any car? I would like to do a booster conversion on my 68 Volvo 122S B18, so I was wandering if it's the same steps for doing the conversion?
not sure, never had a manual jeep
Just wanted to ask, how much longer in the new booster and master cylinder from the fire wall than the old one.
hmm, id say about 3 inches or so.
How much does this benefit the jeep? I have an 88 with the factory booster and it stops on a dime
I gotta do my 1993 gmc yukon tomorrow
Would they work on a yj too
do you have a video for the rear disc brake conversion?
Im having a problem with my 96 xj 5 speed its chacking really bad untill i puche down on the clutch to shift what could ut b?
chacking? throwout bearing most likely
It was the u joints ...
So calm. Great video, thanks.
Just did this on my ` 89 MJ. Huge improvement in stopping power. I think i took too much off of the rod though, my brake light. switch seems loose and my brake lights do not work. Any one have any idea how to fix that?
**Edit** I should mention that I got the booster and MC from a 99 WJ
Weld a bit more material on there and try again.
Will this work with a manual or will the clutch master cylinder get in the way?
Matt,
I can't get my washer bottle back into my 89'. Using a 95 Booster/Master. Did yours slide right in?
I saw on another video that you'll have to re-drill holes about an inch forward in order to make space. Sorry I'm 4 years late
Hey Matt, would this work on a new model XJ? 97-01? If not would you know the best upgrade for a booster, if there is any?
bleepinjeep You know what they do haha.. Didn't think there was a upgrade but you never know. Thought I would ask.
Can I just replace the booster and not the master
Mine leaks but want a newer style
Yes if the master is good.
The bolt patterns to the zj booster on old master don't match up
thanks
@hmd100100 did you check your vacuum at the booster
no, i dont
timestamp. pretty common on youtube, although usually people type it @4:13, and he really meant to say @3:58 & @4:06. ;) Although youtube timestamps are not accurate to the second.
Whats everyones thoughts on a 3 inch bds lift? can you tell a big difference in height?
Its no code.
You're sayin cm instead of mm. 125cm is over a meter, i doubt theres brake booster levers that are over a meter long.
Thanks for the vid.
what brake booster did you use for this video
Will a 01 brake booster fit a 93 xj ??
works for a 2000 grand voyager 3.3l???
The single diaphragm booster sucks, especially with bigger tires. The dual diaphragm is a big difference.
Damn, guess ill have to move some stuff around. I have a V8 in mine so there's not much room to play with.
Is this also an upgrade for a 2001 xj?
2001 already has the dual diaphragm!
I have a 97 xj and I want to do this when I do my rear disk swap what year zj can I get it out of maybe another 97
Nice movie bro good stuff
How long does a brake booster last?
SuperDagod1 until its broke
Will the A/C compressor from a 96 Grand Cherokee fits on a 92 XJ?
No
Awesome vid!
so how much of an difference is there from the old style to the new. Im a crappy mechanic, so I always want to make sure its worth it before I do anything.. ha ha