Transmission shutter when going into overdrive - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-07-2006, 04:35 AM   #1
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Default Transmission shutter when going into overdrive

once i am at like 50 mph and overdrive kicks in it shutters for a quick second under the car it looks like a transmission mount is shot the rubber is all ripped up i dunno if that would cause the shutter but i dont think so is my tranny going to poop?
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Old 10-07-2006, 05:33 AM   #2
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haha! Don't worry about it, its just the engine and trans locking up. if you are under light accel, a shudder is normal to feel. actually is good in my opinion, its tellin yah that OD is working. hah, get used to having a reliable car. It may do odd things, but its not broken...
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Old 10-07-2006, 05:40 AM   #3
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Quote:
Originally Posted by wjcollier07
haha! Don't worry about it, its just the engine and trans locking up. if you are under light accel, a shudder is normal to feel. actually is good in my opinion, its tellin yah that OD is working. hah, get used to having a reliable car. It may do odd things, but its not broken...
dang thats good to hear it never used to do that tho kinda freaked me out

And also my overdrive sometimes dont kick in when i am driving if its not kicked in it wont kick in untill i shut the car off and turn it back on its weird sometimes last time that happpened i put more tranny fluid in there and it stoped doing that but now (3 months later) it did it to me once the other day and now is good electrical problem?
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Old 10-07-2006, 06:35 AM   #4
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Originally Posted by Hans
its called "chuggle"

they all do it it seems...4t60e wise, except the ones that have the new tcc solenoid.
I'd also look at ignition related issues before concluding on that however.
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Old 10-07-2006, 12:50 PM   #5
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At 50 Mph does this shudder show its self in a nasty way? Or is it just a small shudder while the trans shifts to OD with TCC Lock?

If this is not a Miss fire, And misssfires will become very appearent under load, say at like 50 mph in OD with the TCC locked....

Its possible that the trans fluid could be a wee bit burnt, Or the fluid could have lost some of its protective properties... At the same time the trans may be getting hotter than it likes to be... If the fluid has not been changed in a while, I would reccomend a fluid and filter change

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Old 10-07-2006, 06:55 PM   #6
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Quote:
Originally Posted by wjcollier07
haha! Don't worry about it, its just the engine and trans locking up. if you are under light accel, a shudder is normal to feel. actually is good in my opinion, its tellin yah that OD is working. hah, get used to having a reliable car. It may do odd things, but its not broken...
I have called my old Bonneville many things (usually in anger or disappointment), but reliable was never one of them. Having said that, my car used to do the same thing, sounded kind of like shuddering and spark knock for a few seconds. I never thought it was normal because none of our cars that have an auto transmission do this. I wish I could be of more help on this issue, but I don't think its a normal occurence. I also don't think that the TCC should engage during a gear shift, but rather after the shift is made and the car is no longer accelerating ie: cruising, although it is apparently what was happening to me and the original poster.
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Old 10-08-2006, 04:39 AM   #7
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hmm, i probably should have been a little more specific on that.

it is not good if it is a HARD lock in, but I was just saying, at low accel, you WILL feel it because the engine is now linked with the entire drive train and you are basically all wind resistence and such is now directly loaded on the engine at a low speed.

Like Don said, if it is a hard TCC lock in, then get your trans flushed and filter replaced, mine has locked up and shifted SO much softer since I had mine flushed.

its good preventitive maintinance even if there are no problems with it.
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