Rear clunk sound coming from rear diff...

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Rear clunk sound coming from rear diff...

Postby lalojamesliz1 » Sun Dec 31, 2017 10:21 pm

I replaced the diff mount and swaybar links and it hasn't gone away.
I recently took off the front half of the driveshaft and after it was disconnected I just turned the rear half of the driveshaft to see how easy it is and I had to turn it probably a
1/8 to a quarter of the way before it locked and that's when I heard the dreaded clunk.
I turned it back and forth to verify and yes it has play before it locks going from forward to reverse directions.
Is this a simple fix or should I look for a new one?
The pinion seal is leaking and yes it has oil :)
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91 Celica all-trac gen3 swap
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Re: Rear clunk sound coming from rear diff...

Postby lalojamesliz1 » Thu Jan 04, 2018 5:18 am

Nobody? :shrug:
91 Celica all-trac gen3 swap
87 toy 5speed long bed
69 mustang
08 sequoia
14 avalon
and a 2 car garage :shoots:
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Re: Rear clunk sound coming from rear diff...

Postby ___Scott___ » Sat Jan 06, 2018 5:11 pm

lalojamesliz1 wrote:1/8 to a quarter of the way before it locked and that's when I heard the dreaded clunk.

Sounds like it's time to replace the diff. This is a good excuse to track down a torsen diff from an ST205. :D
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Re: Rear clunk sound coming from rear diff...

Postby lalojamesliz1 » Sun Jan 07, 2018 7:23 pm

___Scott___ wrote:
lalojamesliz1 wrote:1/8 to a quarter of the way before it locked and that's when I heard the dreaded clunk.

Sounds like it's time to replace the diff. This is a good excuse to track down a torsen diff from an ST205. :D


:(
Can it fail and cause a dangerous situation? I would love to upgrade it but damn $$$
I'm about to re-install the engine/trans (today I hope) . I replaced the clutch, main seals , timing components and the oil pump seals so another few hundred+ wasn't on the spending list now but if it can be dangerous then f-it.
I have the st205 trans now
91 Celica all-trac gen3 swap
87 toy 5speed long bed
69 mustang
08 sequoia
14 avalon
and a 2 car garage :shoots:
lalojamesliz1
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Posts: 177
Joined: Sun Jul 23, 2017 3:03 pm
Location: Bakersfield, CA

Re: Rear clunk sound coming from rear diff...

Postby Bers » Tue Jan 09, 2018 3:37 am

Make sure you change all differential cushions, not just the one on the back. Part number is 5228120010, they can still be had on toyotapartsoverstock.com for around 80USD, appearantly.

https://i.imgur.com/AxC5ZQS.png

Changing these cushions made a huge difference on my car, was totally worth it.

BTW I had some freeplay too, and had my differential opened by a transmission shop and they told it was fine.

Start with the basics. Your mounts are probably worn out anyway. Grab the Toyota ones while you can, because these part will probably soon be discontinued like almost all our other subframe mounts (you'll have to go with urethane replacement or weld it in place, otherwise).
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Re: Rear clunk sound coming from rear diff...

Postby crackerjack » Tue Jan 09, 2018 3:07 pm

Hi,
I had the clunk in mine and I replaced the rear diff mount. Also, my passanger side drive
shaft seal was leaking. So I took the entire rear diff out to change out seals, mount and
also the input shaft collar which Toyota recormended. The top seal that bolts to the frame
seems fine and my clunking is gone. Since you still get the clunk, I suspect the input shaft bearing
needs to be replaced. Its probably have too much play. You would need a press to get it out and put a new one in along with a new collar and input shaft seal. Can still get them now. I did mine in November
and all is good now.
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