Rebuilding Narrowed 8.8 with Eaton TrueTrac For Turbo Vortec 4200 Volvo 240 Wagon.
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- Опубліковано 25 тра 2024
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your carrier bearings arent all the way down on the carrier, there should be a bit of the carrier sticking out of the bearing, not flush with each other, also that step on the shims is for stacking shims not to center it on the races.
Ohh, interesting, I will check that today.
Yep, just rechecked and pressed them on all the way, used factory drivers side shim and came out right at .011. Thanks!
next time use axle grease on those bearings they'll glide on
The way we use to set up gears is to set the assembly with bearing races in the housing, push the ring gear against the pinion and holding it all together measure the gaps on both sides with feeler gauges. Add the desired clearance to the ring gear side & subtract it from the opposite side then add the recommended preload. That usually gets you pretty close. Any fine tuning is close to a 1:1 ratio (shim change to gear backlash). Like you say you may never do this again but just in case LOL.......
Torquing the bolts while the center is in the press, genius! I just did this same job on mine a couple of weeks ago (also an 8.8" in a 240 getting a Truetrac), but I looked like a gorilla holding a spiky watermelon while trying to torque the ring gear bolts.
When I did the bearings on the diff carrier I put the bearings in a plastic bag and put it in a pot of water and brought it to a boil. They slid on without the need for a press.
first
I did one for my Foxbody. I set it on the tighter side like .010-.011 backlash figuring it would loosen up a bit. I had a video on my channel of the pattern it left but it’s apples to oranges since there are so many different variables with shims and whatnot. But I do believe the coast side was very central and the drive side was a little lower on the gear. It’s been fine so far beating on it behind a peppy 6.0 and t56 combo. And what sloppy said grease and them bearings pop on much easier
Dang bro, thats some heavy breathing 😂😂😂
Watching
There's definitely a lot of "fine tuning " to get the carrier setup properly.
It's not because the bit is dull. You're working with bearing races. They're so tempered they will literally bust into pieces like glass. Knock the races in with a brass drift/punch. Also buy an extra 8.8 front pinion bearing and machine the inside of the bearing so it'll slide on and off till you get your pinion shim dialed in, then you can press the new bearing on when you put it together the final time.
I use a huge pipe wrench to hold the pinion flange while crushing the sleeve.
Not sure where you got. 030" for your pinion shim but I use the one that came out as a start.
You had carrier preload at .007" which was perfect. If the carrier is not hard to get in all your tolerances will change once you test drive it the first time and in any performance application you want to basically have to work to get the carrier in there.
It's almost impossible to get a good pattern on used gears. You definitely won't get a good pattern on the coast side
You think the .010 was better? Or the 2nd at .014 would be fine? It's tight enough in there I can't pull it out by hand, I have to turn it and use pry bar to get it out. Think that should be ok? The one I said was too tight I could barely get back out with pry bar, and wouldn't rock to check lash. Editing may have been deceiving, but I knocked it loose off Camera then set it back in to record pulling it out.
Someone mentioned I didn't have the carrier bearings on all the way, opened it back up and it basically fell out. Fully pressed on bearings and used factory drivers side shim. Passengers side was too tight, broke on the way in, removed .010 from that side and was some work to get it in but went in, and backlash came right out to .011. Thanks for the tips!
Oooooh 3.08:1. Neat
@18 mins when you pull it out and all the shims and cups go flying.
Throw them pinion races in the deep freezer over night they will go right in for ya just dont take the second one out of the freezer till your ready for it
Bingo
I know you’ve done it a couple times on your channel but have you ever had any problems with warping when welding your axle tubes? I want to weld my 8.8 to prevent an axle twist but everything I read says don’t do it, it’s horrible, you’ll kill the rearend.
This is my first one I shortened, so we'll see.