invader_zim

I start the car and put it in reverse and its fine, but when I put it in drive and start to move it starts to run fine for a couple inches then starts slipping and the "s" light blinks until i turn the car off again. I was hoping it might just be the solenoid or the trans computer but something tells me the trans is done. Any input is appreciated

MAD_MIKE

Pull out blue connector find out what code is. Click on H4A link in my sig.

invader_zim

Thank you, I checked the codes and got code 1, 2 & 8. Im guessing that my shift solenoid needs cleaning? Going to go clean it and report back

MAD_MIKE

Keep in mind, if you looked over that link, that some 90-91 TCUs had bad capacitors/resistors. Before you pull solenoids out, carefully remove the TCU and inspect its capacitors and resistors.

invader_zim

took out the tcu and inspected it, everything looks fine as far as that goes. going to be taking off the shift solenoid and cleaning it in a few minutes

invader_zim

Both solenoid assemblies have been cleaned and the only code now is code 8

MAD_MIKE

Did you check the resistance values of the solenoids coils? Check the connectors to them and your ground, should be on the front right corner on a metal bracket near the AT dipstick tube. Follow it directly from the negative battery cable.

invader_zim

Problem solved, it ended up being the sift solenoid. Replaced it andif shifts smoother than it did before. Thank you for your time and help!