Transmission issues 94 Bonneville SE 3800 with overdrive - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 06-07-2007, 10:37 PM   #1
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Default Transmission issues 94 Bonneville SE 3800 with overdrive

I have a leak around the output shaft. I have been looking for an exploded view,but can't seem to find one and I do not have the cash to go buy a manual for the car.

I have bought a new output shaft seal,but now I have no clue how to install it.any help or pic'* would be great. Thanks

just a note: I have taken the wheel and axle off and seen where the leak is,I just don't know if the short shaft sticking out comes off.
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Old 06-08-2007, 07:00 PM   #2
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Which end of the trans is it? Passenger or Driver?

Passenger I think would be pretty easy, comapred to the driver'* side....

Soon as we know a lil more, we maybe able to help you much more.
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Old 06-08-2007, 07:55 PM   #3
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Driver side
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Old 06-08-2007, 07:57 PM   #4
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Eeek....

I'm thinkint to remove that seal, that side pan is gonna have to come off, and i don't believe that can be done in the car......I know there'* a few guys here that can verify that for me.
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Old 06-08-2007, 09:29 PM   #5
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You'll have to find a way to get at the old seal(removing the axle). The side pan actually has a hole cut in it for the axle to go through, and the seal is in the channel plate. You may be able to cut it out with a chisel(carefully as not to damage the surface it seats in or the channel plate), then tap the new one in. Think of it like a front engine cover seal. I'm saying this assuming that the structure of the 94 4T60 is the same, or at least extremely similar to the 97 4T60-E. I can snap a picture of the channel plate if you need me to. I can't tell you how much room you would have to work with to remove it though....
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Old 06-08-2007, 10:23 PM   #6
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not sure if this will help. Did this from memory so I hope it is correct.

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Old 06-08-2007, 10:39 PM   #7
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It'* accurate enough. You can pop that "thing" off if you massage it with a pry bar(or whatever is handy. It comes out though). Ben had to pull his and I think it fought a little. I'm sure he can give a better explanation.

This is what your after. Keep in mind, this stuff is off of a 97, but I can't imagine it being significantly different(correct me if I'm wrong)

Just the channel plate and seal.
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What it looks like with the side cover on.
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You can judge if you have room enough in your engine bay to knock that seal out. I would think you can, but I don't know for certain.
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Old 06-08-2007, 10:43 PM   #8
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identical, Thank god that part comes off. I thought I was going to have to take it to a shop and get raped on the price to fix it. ($1200) everyplace I looked.


Thanks guys! I'll post back after I get the new seal and tell you how it went.

note: on the 94 Bonn, there seems to be plenty of room to get that popped out.
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Old 06-09-2007, 05:18 PM   #9
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New seal replaced. All in all it wasn't bad. My problem now is the top of the drivers side tire is to far out and I can hear the tire make a whinny noise as I drive down the road.

A few months back the sub-frame mounts (all 4 rear) broke. I replace those and the steering wheel was sitting way off center. My local mechanic said that was no big deal and the car did not need to be realigned.

After I put the new Output shaft seal in I adjusted the tie rods and she is driving straight as an arrow, but like I said now the tire is at an angle. How do I readjust that?
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Old 06-09-2007, 05:21 PM   #10
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Glad you got it done. Hopefully someone can chime in on the adjustment you need to make.
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