93 Lumina 3.1 TCC replacement

[Andreas_Utah]

After reading many of the threads and doing the tests recommended by many, it is clear that my TCC Selenoid has gone bad. Is there a simple way to replace the faulty one? I've read that it requires dropping the engine slightly to get to it, but I don't think I have the tools necessary to hold up the engine while I do that. Is there any other way? thanks...

[1991lumina]

I just unplugged my TCC and its been unplugged for a year now and it runs just fine

[Andreas_Utah]

With the TCC unplugged, the car stays in 3rd gear. I have to manually shift from second into 3rd. It will not go into 1st with it unplugged. Is this similar to what you are experiencing?

[1991lumina]

Before I unplugged my TCC it would surge when I tried to take off but after taking off and having it die couple times it would run fine until i slow down and stop and try to take off again, after I unplugged it, it never did it again and I have never had a problem with it shifting or anything

[jeffcoslacker]

Originally Posted by Andreas_Utah

With the TCC unplugged, the car stays in 3rd gear. I have to manually shift from second into 3rd. It will not go into 1st with it unplugged. Is this similar to what you are experiencing?

This isn't right. You sure you didn't unplug the shift solenoids? That's what it sounds like...

[savannaz34]

LOL

[richtazz]

A 91 Lumina could have a 4L60 trans, which has a vacuum modulator and a 4 wire TCC switch. On those models, you can just unplug it and all you'll lose is lock-up. On the 93 Lumina, it has the 4L60E electronic transaxle (optional on the 91 also) with the 6 wire TCC plug. Since this plug also controls the shift solenoids, you cannot just unplug it or the car will go into limp home mode which is 3rd gear.

[Andreas_Utah]

Thanks for that information. I do have that 6-wire and that's exactly what happens. I feel like I'm driving my grandpas old '53 Dodge pickup with the H-shift on the fly.

I guess I better get this car up on the blocks. The fuse for the TCC also controls the primary cooling fan, so I am not getting out of this one easily. I suspect that the gasket that keeps fluid off these 2 selenoids has gone out and fluid is getting in there and shorting them out. Is this a Saturday afternoon job that I won't loose my religion over, or should I bring this into the shop and let them do it. I just replaced my Ignition Control Module , so compared to that, what?

Thanks again.

[jeffcoslacker]

http://autorepair.about.com/cs/doity.../aa011703c.htm

This is typical for the job...

[jamespa48]

Originally Posted by richtazz

A 91 Lumina could have a 4L60 trans, which has a vacuum modulator and a 4 wire TCC switch. On those models, you can just unplug it and all you'll lose is lock-up. On the 93 Lumina, it has the 4L60E electronic transaxle (optional on the 91 also) with the 6 wire TCC plug. Since this plug also controls the shift solenoids, you cannot just unplug it or the car will go into limp home mode which is 3rd gear.

I have a 1991 lumina euro. It just started the brake and stall thing - I found the plug it is 4 prong- first thing tomorrow I am going to unplug it and see what happens - will let you know what happened.

[jamespa48]

Originally Posted by 1991lumina

Before I unplugged my TCC it would surge when I tried to take off but after taking off and having it die couple times it would run fine until i slow down and stop and try to take off again, after I unplugged it, it never did it again and I have never had a problem with it shifting or anything

Thank you everybody for the info about the tcc solenoid stallout when you come to a stop the engine stalls and dies like you did not release the clutch on a standard tranny - I pulled the plug on the side of the tranny - it had 4 prongs (1991 chevy lumina euro 3.1 motor) the car runs perfect - again thank you and thank you automotiveforums.com -