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My 2001 GMC Jimmy 4x4 Automatic with 84K miles. It winds when I put it in reverse and I think I only have 1st and 2nd gear. Additionally it revs high, like over 3000 rpm, delays and then eventually shifts to 2nd gear. I haven't replaced the transmission fluid and filter since 60K miles. Any suggestions short of a rebuilt/new transmission?
Re: My 2001 GMC Jimmy 4x4 Automatic with 84K miles. It...
It winds up in 1st and then shifts right from 1st into 3rd. Then never shifts into 4th. Plus rev is gone. You broke the sun shell. The transmission will need to rebuilt or replaced.
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Change the switch itself if it drives normal then randomally kicks into 4 lo/4 hi i had the same problem and a transmission shop told me it was the vaccum and the transfer case but one of my mechanic friends told me that it was my switch and shops only tell you other things for the money. Try changing the switch.
On the 1995 Jimmy, the shift cable can come loose on the mount on the side of the transmission where the cable meets the trans. When it slips, the alignment goes off and causes the driver to not be able to put the trans into park. If you take a long stick you can push the shift arm on the trans to the park position and your trans will go into park.....what you (and I) really need to know is how to take the shift cable mount apart and reset it.
Does it also hold first gear longer that it should and then shift right from 1st to 3rd? It sounds like you broke the sun shell in the transmission. The trans will need to replaced or rebuilt.
It will take off from a stop in overdrive but as soon as it shifts into 3rd at about 30 miles per hour it jumps into neutral? If yes, you have a burnt 3/4 clutch. The transmission will need rebulit. Cost of about 1600 dollars.
It sounds like you broke the sun gear shell in the transmission. This is real common on 4L60E. The transmission will have to be disassembled to fix it. If this is what is wrong it will have no reverse and hold 1st till about 30 and then skip 2nd, right to 3rd. Then never shift in to 4th.
Had the same problem on my 2001 GMC Jimmy, but my reverse was also out!!!! Was the transmission!!! But it also did the same thing when starting from a dead stop! Had to rev up the RPMs to get it to shift, but once it got into the higher gears, it drove fine!!!! My mother also had a 2001 GM S-10 with the same problem and it was her tranny as well!!! Hope this is not your problem because it is not cheap........a friendly mechanic charged $1300 to replace the tranny with a used one with lower miles!! He also said that these models of GMs were notorious because the spline gear used in these models were made of a lower grade of metal and were prone to wear out prematurely!!!!! I also first suspected the shift sensor before I talked to a professional!!!!!
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