No 4th gear
Posted: Wed May 17, 2017 7:55 pm
1988 635 Csi with auto trans, 177K miles. My daily driver.
Had the trans rebuilt 10K miles ago but yesterday it decided not to shift into 4th gear. Also when cold the revs flare for about 1 second during shifts between 1st to 2nd and 2nd to 3rd for just the first 3 - 4 trips up through the gears but not between 3rd and 4th. This happens in E trans mode. I have not tried to see what happens in S mode. I have read about an additive named Trans X that might help with this problem. Comments?
Unfortunately the owner of the one man shop who rebuilt my trans passed away 6 months ago, so I have no one to go back to. I plan to change the fluid (Mobil 1 Dextron III) as a first step. I would appreciate any and all information regarding what might be causing the problems and potential fixes.
Was planning to convert my near perfect black 1989 auto 635 Csi to manual from a 1985 635 Csi I parted out but now might have to do the 1988. Is there a good (with photos or video) of the auto to manual conversion?
Thanks in advance for any help offered.
Todd
Had the trans rebuilt 10K miles ago but yesterday it decided not to shift into 4th gear. Also when cold the revs flare for about 1 second during shifts between 1st to 2nd and 2nd to 3rd for just the first 3 - 4 trips up through the gears but not between 3rd and 4th. This happens in E trans mode. I have not tried to see what happens in S mode. I have read about an additive named Trans X that might help with this problem. Comments?
Unfortunately the owner of the one man shop who rebuilt my trans passed away 6 months ago, so I have no one to go back to. I plan to change the fluid (Mobil 1 Dextron III) as a first step. I would appreciate any and all information regarding what might be causing the problems and potential fixes.
Was planning to convert my near perfect black 1989 auto 635 Csi to manual from a 1985 635 Csi I parted out but now might have to do the 1988. Is there a good (with photos or video) of the auto to manual conversion?
Thanks in advance for any help offered.
Todd