W30post Posted April 27, 2012 Report Share Posted April 27, 2012 So I thought my 2004 Monte Carlo was failing on motor mounts and the transmission shop I have been dealing with it is fairly certain it is not that. If you support the car on the rack with the front tires off the ground you can run the car in drive and feel something the trans causing the whole thing to jump around. He is working with the GM dealership locally to see what things may have caused this and what he should be looking for when tearing it apart. Fingers crossed this isn't too terribly expensive. Anyone had parts fail inside the trans beside usual wear items? Quote Link to comment Share on other sites More sharing options...
oldscsc Posted April 27, 2012 Report Share Posted April 27, 2012 I'd get a second opinion before you do anything too major. Stranger things have happened, but there isn't much inside of a trans that can come loose and cause the whole trans to shake like you're describing without having many much more serious side effects. Quote Link to comment Share on other sites More sharing options...
W30post Posted April 27, 2012 Author Report Share Posted April 27, 2012 I'd get a second opinion before you do anything too major. Stranger things have happened, but there isn't much inside of a trans that can come loose and cause the whole trans to shake like you're describing without having many much more serious side effects. He is not usually a shot gun type of mechanic and is trying hard to find what is causing the bounce without just tearing into it. Axles well, he was highly confident because of the movement he saw while running the car on the lift with it in gear that a change would be felt. Maybe there was a difference but this other issue is much more violent than the axle. The shaking has been there for about 3 Kmiles if that long. I don't drive the car hard all the time and drive about 11 miles to work and back. Not sure what it could be yet and he is trying to find a resolve. Maybe sometime soon I will get to the bottom of it. Again he is working with the GM head mechanic to try to find any issues that have been seen before diving head first into a rebuild. Quote Link to comment Share on other sites More sharing options...
tornado_735 Posted April 27, 2012 Report Share Posted April 27, 2012 Maybe something with the torque converter is going wonky? Then again, you'd have the shake without the car moving to... Quote Link to comment Share on other sites More sharing options...
Schurkey Posted April 28, 2012 Report Share Posted April 28, 2012 (edited) Anyone had parts fail inside the trans beside usual wear items? I haven't blown-up a front-drive transaxle on a vehicle I owned. Had a Mopar transaxle explode on me during a test-drive. Damn near hit the ditch, as it locked-up the right axle shaft so the car took an immediate right turn. Had a Turbo-Hydramatic 700 put so much metal into the fluid that it seized the governor. Had to drive 30 miles home in first gear. Planetaries spit out their roller bearings and were just flopping around like wounded guppies. That was $1700 more than a dozen years ago. Planetaries on the 700 were practically a wear item. Had a Turbo-Hydramatic 400 that caused the whole car to shake like it was having an orgasm if I'd pull away from a stop sign with more than about 1/4 throttle when the selector was in "drive". Did not do it when the selector was in "Low". The dashboard vibrated so badly it was impossible to read the speedo or fuel gauge. That one was pretty easy--the one-way roller clutch that "holds" in first gear was slipping on heavy throttle, and each time it jumped through a slip/grab cycle, the car would bounce from the sudden application--and sudden release--of engine torque. First Guess: If you've got a bouncing engine, you'd better have 'em inspect the one-way clutches in that transaxle. Edited April 28, 2012 by Schurkey Quote Link to comment Share on other sites More sharing options...
W30post Posted April 30, 2012 Author Report Share Posted April 30, 2012 First Guess: If you've got a bouncing engine, you'd better have 'em inspect the one-way clutches in that transaxle. Are you the same Schurkey that replys to my stuff on Olds message boards? Anyway, the same thought has been crossing my mind. If something inside is coming apart, what other damage am I doing when I continue to drive this car. I told him I want it found and I don't have to have this car for a while if he needs to keep it so he can take his time and find the right fix. He said Friday he was going to dive back into it today and start looking at what might be the culprit. Maybe late today I will get some answers on what might be going on. Quote Link to comment Share on other sites More sharing options...
Schurkey Posted April 30, 2012 Report Share Posted April 30, 2012 Are you the same Schurkey that replys to my stuff on Olds message boards? That's my evil clone. No. Wait a minute. I'm the evil clone. There aren't many of us Schurkeys. I have folks tell me that they know a bartender with that name, or lived next to someone with that name...but it always turns out to be spelled differently. Quote Link to comment Share on other sites More sharing options...
W30post Posted May 2, 2012 Author Report Share Posted May 2, 2012 That's my evil clone. No. Wait a minute. I'm the evil clone. There aren't many of us Schurkeys. I have folks tell me that they know a bartender with that name, or lived next to someone with that name...but it always turns out to be spelled differently. Was worth a shot. Anyway, trans shop thinks it is in the axle extension tube on this car. Maybe a bearing going out or the shaft inside may be warped. Have to call him later today to see what he has found. Quote Link to comment Share on other sites More sharing options...
W30post Posted May 8, 2012 Author Report Share Posted May 8, 2012 So the conversation I had today was the axle extension could be twisted. I have never done neutral drops but I didn't get the car new. I have put it on the drag strip a few times with varied results. My question to you guys, have you heard of this on factory boost cars? I see ZZ Performance sells a stronger part for this so it may be a more common problem than usual but I just want to find the problem. Quote Link to comment Share on other sites More sharing options...
W30post Posted May 9, 2012 Author Report Share Posted May 9, 2012 So the conversation I had today was the axle extension could be twisted. I have never done neutral drops but I didn't get the car new. I have put it on the drag strip a few times with varied results. My question to you guys, have you heard of this on factory boost cars? I see ZZ Performance sells a stronger part for this so it may be a more common problem than usual but I just want to find the problem. The axle extension shows no signs of twist or out of true motion... We are all scratching our heads now with what to do next. Quote Link to comment Share on other sites More sharing options...
W30post Posted June 7, 2012 Author Report Share Posted June 7, 2012 As in the thread, wrong wheels on W-body, I tried the wheels off our Magnum and went for a long drive. The problem I am chasing is tire and wheel related. Not to say changing motor mounts didn't change the car ride and the driver's axle was wobbling, I saw that myself. Just the rest is tires and will be fixed today. Quote Link to comment Share on other sites More sharing options...
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