How to Replace Differential Oil Seals on Y38 BRZ FR-S FT86 Torsion LSD

We replace oil seals and gasket on a Y38 Torsion LSD differential with all new axle seals, pinion seal, and rear cap seal.
The P/N are same for Toyota and Subaru
Rear Pinion Seal (90311-38070): amzn.to/48mSvtX
OEM Axle Seal x 2 (90311-43009): amzn.to/3vr5so3
Toyota FIPG 1281: amzn.to/48kYJdX
Aisin 1281 version: amzn.to/48jKs1a
Tools:
30mm Socket: amzn.to/3H8zqQa
Seal Puller: amzn.to/3tDjt1r
Pull Press Sleeve: ebay.to/3NO7pRC or amzn.to/3NLDOZ1
Y38 eBay Auctions
ebay.to/48mM0He
bit.ly/3RumjxE
Rust Remover Gel: amzn.to/48kKMMy
Chassis Saver Black: amzn.to/48pfX9D
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For questions and inquiries: [e-mail]
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#brzy38 #torsionlsd #y38differential
0:00 Intro and Pinion Nut Removal
3:30 Pinion Seal Removal
5:57 Pinion Seal Install
7:48 Pinion Nut Install
8:25 Axle Seal Removal/Install
10:40 Rear Cap Removal and Seal
Disclaimer: "Tuner with Kids", the alias for the human content creator for this UA-cam channel, is not responsible for any damages, injuries, losses, or liabilities associated with any repairs, upgrades, or maintenance performed on yours, or any elses, vehicle/property whatsoever. No warranty, express or implied, is made as to the accuracy or completeness of any information provided within this channel. Viewing and using the “as-is" information of this channel is totally at your own risk. Always wear personal protection equipment and follow appropriate vehicle manufacturer service manual guidelines with original manufacturer parts only when performing any repairs, upgrades, or maintenance upon any vehicle/property. Please note that some of the links provided are affiliate links and I may earn a commission if you purchase through the links. I use all of the products shown and recommend them because they are from companies I have found to be helpful and trustworthy. Please let me know via email if you have questions regarding any of the products/tools used.

[@DdotxSdot]

Please record all the small steps it really helps

[@NotHome]

I want you to know: I’ve been working on refreshing my Sportcross and your videos have been an absolute must to review for several projects, including this one. Though, I’m planning to go from an M98 to an M85 I am doing a refresh on both!

[@TunerwithKids]

Cool, isn’t the M98 automatic LSD already? I have that on my SX. Is the M85 the 3.7 manual LSD?

[@NotHome]

Yep! Looking for a longer final drive for plans later down the road. @@TunerwithKids

[@prasamin]

Binh, did you notice any inaccuracy in your speedometer reading after swapping the Y38 in? I have an M98 and a Y38 to swap into my automatic IS300. I prefer the Y38 to get a little more off the line, but I don't want to have my speedometer off....

[@imJGott]

are you going to replace the diff bushings in the rear sub frame as well? i put this diff in my is300 and changed out the rear sub frame and rear diff bushings. yes you can feel the vibration of the rear in the car but its not a crazy amount of vibration.

[@TunerwithKids]

Not planning on it for the 2IS. Bushings are all still good on my car. Maybe I’ll do it on the IS300 when I change the seals on that diff.

[@Adam-FR]

What's the part number for those FRS diff bolts?

[@TunerwithKids]

IDK but should be same as IS250 bolts if you look those up.

[@Adam-FR]

@TunerwithKids yea, I gotta look in some parts catalog or something. Having trouble finding them.

[@worklab415]

What's the benifit of this LSD?

[@TunerwithKids]

It’s an LSD vs open diff. It’s cheap and easy to find. Bolt on for IS250. Is 4.1 vs stock 3.9 ratio so faster off the line acceleration.