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Old 02-07-2021, 06:26 PM #1
Z4_marin Z4_marin is offline
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Is there a DIY for Tcase output seal?

After >130,000 miles and 11 years of ownership, I have my first issue! Not bad.

I did a little searching around but didn’t find one. This must not be a very common issue since it seems there are DIY for just about everything else. It’s only weeping now and not “leaking” so it’s not urgent.
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Old 02-07-2021, 10:58 PM #2
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It's the same transfer case as Tacoma, 4th gen 4runner, probably several other models, so a how to for those will be the same.

I replaced mine a while back because of a leak - it ended up not being that seal, but actually the O ring for the blank cover for where the speedo sensor would be, if it had one.
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Old 02-07-2021, 11:16 PM #3
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Quote:
Originally Posted by Z4_marin View Post
After >130,000 miles and 11 years of ownership, I have my first issue! Not bad.

I did a little searching around but didn’t find one. This must not be a very common issue since it seems there are DIY for just about everything else. It’s only weeping now and not “leaking” so it’s not urgent.
The official Toyota repair manual will show you how to do it: TOYOTA 2016-2019 4Runner Repair Manual RM27F0U

P.S. If it is only weeping, leave it alone.

Last edited by fkheath; 02-07-2021 at 11:43 PM.
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Old 02-09-2021, 12:13 AM #4
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Quote:
Originally Posted by Jeremy556 View Post
It's the same transfer case as Tacoma, 4th gen 4runner, probably several other models, so a how to for those will be the same.

I replaced mine a while back because of a leak - it ended up not being that seal, but actually the O ring for the blank cover for where the speedo sensor would be, if it had one.
Many thanks for the info. I think I might clean up the area very well and put some fluorescent dye in there, then drive it around for a day and see exactly where it’s leaking. I suspect mine might be leaking in the same place.
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Old 02-09-2021, 12:14 AM #5
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Quote:
Originally Posted by fkheath View Post
The official Toyota repair manual will show you how to do it: TOYOTA 2016-2019 4Runner Repair Manual RM27F0U

P.S. If it is only weeping, leave it alone.
Oh cool! Many thanks. I probably should leave it along because it’s not bad BUT my OCD nature precludes me from not fixing it
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Old 02-09-2021, 10:58 AM #6
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Many thanks for the info. I think I might clean up the area very well and put some fluorescent dye in there, then drive it around for a day and see exactly where it’s leaking. I suspect mine might be leaking in the same place.
If it is the speedo sensor hole, it is a stupid easy fix. 1 bolt (the one pointing to the passenger side) and it's out. Part number is 96711-24030 $4
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