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I have a 95 Riviera with 3.8L SC and 4T60E. Yesterday the car started making a horrible noise as I pulled into a parking lot. I stopped the car. Now, when I put it in any gear but neutral it sounds like it's going into gear and moves a few inches, but then emits a loud grinding noise. If I put it in gear with the engine off and push the car, it moves but the engine shakes back and forth like it's half connected to the driveshaft. My question is, when I get back from my business trip Friday, is there any way to diagnose what the problem is? Is the TCC solenoid or vacuum modulator a remote possibility, or are these not even on the list. I would try to fix anything short of removing the transmission; that's too much for me. Thanks.
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I've had a tranny (4L60E) very low on fluid (very very low) and it made some very bad grinding noises. So that is the first place I would start.-Brad-
89 Mustang : Future 60V6 Power
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Follow the build -> http://www.3x00swap.com/index.php?page=mustang-blog -
if its grinding, its got internal issues. it sounds like a planetary has come apart.
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If you can, pull the oil pan off the trans and see whats in the bottom of it. Your description sounds just like the problem I had a couple weeks ago.
Here is a pic of what happened to mine. Same trans BTW.
This is the final drive assembly. In the middle, you will see whats left of the planetary gear assembly pinion pin. 3 pieces now.
If you want to see more pics of it, go here...
http://www.bonnevilleclub.com/forum/...ic.php?t=581401995 Bonneville SE
Mods: New windshield that leaks.
6X9's in rear doors.
BLOWN TRANNY, at 184004 miles.Comment
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does that year tranny have the hardened shell?Andy
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fastest 1/8: 10.19@ 67.17
fastest 1/4: 16.16@ 82.70
62mm TB, 1.6 roller tip rockers, Ostrich 2.0, UD pulley, TB heater bypass, K&N, 180* stat, No cat, 99Grand AM dual cooling fans. 4T65E swap FDR 3.69, EP LSD, F.A.S.T. transmission controller, TransGo shift kit.
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Not sure if it is. Could you tell me how to find out?Originally posted by torq4551995 Bonneville SE
Mods: New windshield that leaks.
6X9's in rear doors.
BLOWN TRANNY, at 184004 miles.Comment
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id put money on the reverse reaction drum/ shell whatever.. i have had 2 transmissions blow them to bits and do a similar thing...94 Grand Prix
3400- NX 75 shot, Cammotion cam, S&S headers, and a few more toysComment
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Answer: Final drive
The final drive/differential gears were, in technical terms "shredded". I've looked at drawings of the entire assembly in the service manual, and saw the gears - teeth ground off - but still can't quite picture how the whole thing works. In any case, it's fixed now. What absolutely amazes me is how small those gears are to push a two ton car, and how thin trans fluid is compared to gear oil. I'm changing my trans fluid every 30k or less from now on.Comment
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