Rear Differential rebuild
11-10-2020, 05:30 AM
Post: #1
Rear Differential rebuild
Dear guys.

plan to do rebuild project on the rear differential due current facing oil leakage from the driveshaft.

did u guys know the aftermarket part-no for "differential carrier Oil seal", "pinion tapered bearing" and "Pinion Bearing Spacer"?
[Image: AEU86 AE86 - Rear Differential rebuild]
official toyota code as below:
1. Carrier oil seal = 90311-38015
2. pinion front tapered bearing = 90368-30002
3. pinion rear tapered bearing = 90368-34049
4. Pinion bearing spacer = 41231-22010

plan to get all parts ready before dismantle it.

please do advise. TQVM.


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11-16-2020, 05:12 AM
Post: #2
Rear Differential rebuild
Dear All,
after go thru all the post at this group and found that Jondee86 had share on the parts no as i requested for. thanks allot to Jondee86. below as the page.
http://www.aeu86.org/forum/Thread-Koyo-B...ber-Needed

last saturday as public holiday so have sufficient time to do replacement job. due to limited space under the car, so take me approximate 1/2 hours just to dismantle that oil seal and bearing.[Image: AEU86 AE86 - Rear Differential rebuild]

the whole faulty parts removed as leakaged seal & wear bearing, while others will reused.[Image: AEU86 AE86 - Rear Differential rebuild]
[Image: AEU86 AE86 - Rear Differential rebuild]

and finally put in the new seal and bearing
[Image: AEU86 AE86 - Rear Differential rebuild]

On the parts that i had replace as below:
1. Pinion Differential Carrier Oil seal (90311-38015) AKA Double acting seal 38/65/12/19
2. Pinion Front tapered bearing (90368-30002) AKA TIMKEN M86649 (cone) / M86610 (Cup)

lastly top up gearoil at 1.3L. Hope the seal and bearing can least for years. thanks.


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11-16-2020, 10:46 AM
Post: #3
Rear Differential rebuild
It's not really the correct way to replace the bearing as the adjustment for it is done by crushing the spacer a bit at a time and reading the torque required to turn the pinion shaft. I guess you could have accurately measured the length of the old spacer and crushed the new one a few thousands less to allow for the new bearing. If the backlash is really tight after driving for a short distance you might want to try the above... if you haven't already of course!

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11-16-2020, 11:30 AM
Post: #4
Rear Differential rebuild
(11-16-2020 10:46 AM)totta Crolla Wrote:  It's not really the correct way to replace the bearing as the adjustment for it is done by crushing the spacer a bit at a time and reading the torque required to turn the pinion shaft. I guess you could have accurately measured the length of the old spacer and crushed the new one a few thousands less to allow for the new bearing. If the backlash is really tight after driving for a short distance you might want to try the above... if you haven't already of course!

dear Totta,
can u please do explain in detail? cant 100% get what u mean? like to learn more, tq
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11-16-2020, 11:57 AM
Post: #5
Rear Differential rebuild
I'm sure there's better videos out there but he explains it rather simple due to his limited English which I still think is impressive
https://youtu.be/ZYWaHOcXA5w

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11-16-2020, 08:08 PM (This post was last modified: 11-16-2020 08:10 PM by totta Crolla.)
Post: #6
Rear Differential rebuild
Here is part two of the video that Bean shared and he covers pinion bearing pre-load at the beginning. Basically there has to be a set pre-load on both bearings and it is set by crushing the tube: https://www.youtube.com/watch?v=ZQIXOmMnEp0 From the video l would say that he has done this many times before.

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11-16-2020, 11:55 PM
Post: #7
Rear Differential rebuild
(11-16-2020 08:08 PM)totta Crolla Wrote:  From the video l would say that he has done this many times before.

If you have ever seen him drive you would understand...
He basicly clutch kicks 3 times at every corner...


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11-17-2020, 10:40 AM (This post was last modified: 11-17-2020 10:42 AM by chenfon.)
Post: #8
Rear Differential rebuild
(11-16-2020 11:57 AM)Bean Wrote:  I'm sure there's better videos out there but he explains it rather simple due to his limited English which I still think is impressive
https://youtu.be/ZYWaHOcXA5w

thank, learn allot from the video...

(11-16-2020 08:08 PM)totta Crolla Wrote:  Here is part two of the video that Bean shared and he covers pinion bearing pre-load at the beginning. Basically there has to be a set pre-load on both bearings and it is set by crushing the tube: https://www.youtube.com/watch?v=ZQIXOmMnEp0 From the video l would say that he has done this many times before.

will re-do it by this weekend if possible. thanks guys.
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11-17-2020, 01:05 PM
Post: #9
Rear Differential rebuild
(11-16-2020 11:55 PM)r.ave Wrote:  
(11-16-2020 08:08 PM)totta Crolla Wrote:  From the video l would say that he has done this many times before.

If you have ever seen him drive you would understand...
He basicly clutch kicks 3 times at every corner...


54seconds that's more like a dozen Big Grin

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11-19-2020, 09:57 PM
Post: #10
Rear Differential rebuild
Short course car on a long course ? Need more power ? Eu acho que sim Dodgy

Cheers... jondee86

The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
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