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It started with making turns. When I would turn (either a gradual or a hard turn) the engine would rev up and fall down to below 1k rpm and jump back up to about 2-2.5k rpm. No check engine light came on, so I didn't think much of it. Then, when i was stopped and started to go again it would hesitate, rev up and jerk forward as if the gears were slipping. Sometimes so much so that the tires would squelch. Not too long after that the "service engine light" came on. It happens quite frequently now and is quite annoying.
Has anyone had similar problems, and if so, what were you able to do to fix the problem.
My problem like yours started about or around 75,000 miles. The car will act like it is spinning or shudder really hard when you go to pull out in first gear but does not do it in any other gears. Mine only does it once in a blue moon and for no rhyme or reason.
I had a new filter and transmission fluid put in mine along with something called "Shutter Out" You can get it at Car Quest. I think that it was about 15 dollars for a tube of it. Anyway it really helped the problem but did not solve it.
Instead of having a really bad shutter it changed it to a slight slip instead.
I have been to a transmission shop and was told that I have a seal going bad and that it is causing the transmission to loose pressure. That in turn causes the clutches to slip instead of being held together. I was told 1000 for a rebuild.
I will drive my car till it stops and then get it fixed. . Hope that this helps..
We replaced the engine about 6 months ago. Tranny is original and has 155,000 miles on it. Fluid was a little low this morning when we checked it and we filled it up before going out again this afternoon. Thanks so much for any help ya'll can give me!!
(buhog)
-Bitto
The older transmissions (TH440T4 and 4T60) had vacuum modulators.
The TH440T4 used a cable from the throttle to the trans to regulate shift timing and used hydraulics to determine shift timing. The 4T60 is shifted by the computer, which controls a few shift solenoid valves in the transmission.
For what it's worth...
Jay
Were you ever able to resolve this issue?
I have the same problem in my 2001 Buick. Can you email me, mfile2000@hotmail.com with how you fixed it?
Thanks
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