Rear dif bushing explosion?
So who here has came across your rear dif bushings literally exploding and dropping the dif from the car? I had old oem ones that came in my rear dif setup i bought and i never thought to change them I guess that was a mistake. Am I the only one or maybe something else caused this?
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Originally Posted by Shortpersonbk
(Post 1354259)
So who here has came across your rear dif bushings literally exploding and dropping the dif from the car? I had old oem ones that came in my rear dif setup i bought and i never thought to change them I guess that was a mistake. Am I the only one or maybe something else caused this?
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Originally Posted by bbundy
(Post 1354387)
With the OEM setup the bushings could be turned to dust and the diff still wouldn't come out of the car. Ive broken the aluminum housing before I suppose you could break both sides and the diff would come loose but the bushings are captured in a way the rear sub frame would have to be ripped apart before it would drop.
i just wanted to see all who has had the oem bushing fall apart like that. |
Haven't seen or heard of this...ever.
Sounds like yours was either not put together correctly or something was super janky. Definitely not common or even normal. |
The only way I could see the diff coming off the car is if you failed to put the retainer cups on and just put the nuts straight on to the bushing sleeve.
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Yep, user error or they're rusted through or broken
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Got any pictures of your setup so we can assess how the setup is different than OEM?
I'm not sure whats going on here but I think there could be some significant design flaws with this. 766DD6A6-89BB-4D22-A2C5-71D5A0073C81_zpsd60drkxk.jpg Photo by shortpersonbk | Photobucket |
Originally Posted by Midtenn
(Post 1354488)
The only way I could see the diff coming off the car is if you failed to put the retainer cups on and just put the nuts straight on to the bushing sleeve.
Didnt notice the destroyed tabs till now. Kind of a bummer as this means the rear sub assembly needs to be removed and replaced.
Originally Posted by bbundy
(Post 1354546)
Got any pictures of your setup so we can assess how the setup is different than OEM?
I'm not sure whats going on here but I think there could be some significant design flaws with this. 766DD6A6-89BB-4D22-A2C5-71D5A0073C81_zpsd60drkxk.jpg Photo by shortpersonbk | Photobucket |
*Edit just pulled subframe ...and looked around it looks like the retainer cups were not on or there would be a piece of hte broken plate between the bolt and whats left of the bushing.
Sucks i bought this all put together and just tossed it in without really looking at it to much. So guys dont do..what i did. |
Originally Posted by Shortpersonbk
(Post 1354585)
*Edit just pulled subframe ...and looked around it looks like the retainer cups were not on or there would be a piece of hte broken plate between the bolt and whats left of the bushing.
Sucks i bought this all put together and just tossed it in without really looking at it to much. So guys dont do..what i did. |
Originally Posted by bbundy
(Post 1354596)
The picture I linked from your build thread shows the lower retainer parts of the mounts not installed. It would be totally relying on shear strength of rubber in the upper portion of the mount. Installed the way Mazda does it there is limited movement allowed before it bottoms out hard in compression of the rubber bonded on the lower retaining piece.
That is not a design issue...that is a issue where they just were never put on. The whole assembly came from a running car and we just kinda shoved it in without paying much attention. It was pure install error...in the future i will have to make sure not to trust things as much just because they came from something that worked. New retaining cups and bushings will be on the way by the end of the night just have to decide which ones i want. Now that the issue is solved i can move onto my trunk mounted radiator.......inb4 many neg cats. |
Well I'm glad I guessed correctly. I learned from experience because I had a 280ZX that did the same thing because someone worked on the diff before owned the car and didn't put a retaining washer under the bushing. Diff hit the ground leaving a stop light one day. 16 year old me was completely confused at the time.
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Im surprised that the thin material and the baby bolts is enough to stop that bushing from doing that...
Sadly it looks like the mounts that hold the retaining clips are destroyed so i will need to have something welded up to fix that. |
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