RE: Transmission problems -- ECM the cause??
 

sun shells full name would be sun gear reaction shell

RE: Transmission problems -- ECM the cause??
 

I"m sorry for the time lapse in responding....the fuel pump went out now and I've ordered a new one.....My transmission is a 700r4....
Nobody thinks that the probably could be in the ECM?????

RE: Transmission problems -- ECM the cause??
 

The ECM is unplugged because the motor is carborated and not fuel injected anymore. How can I bypass the computer and have the transmission's torque convertor unlock when necessary?
The transmission is a 700r4......maybe I should post a new thread...how to make the silverado run without a computer.

RE: Transmission problems -- ECM the cause??
 

the trans is not controlled by the ecm..just the lock up is...she shifts off vacuum and pressure ..and good ol mechanical valves n linkages

RE: Transmission problems -- ECM the cause??
 

i did a lil lookin on alldata to be sure, and i found there are some electronic controls for the 4-3 shift that i was unfamiliar with on these trucks. if your only symptom was no OD i wouldnt rule out the ECM, but having no reverse, the ECM has nothing to do with that. the only way i can see this being ECM related problem is if gnomes placed an ECM inside of your transmission.

RE: Transmission problems -- ECM the cause??
 

does it lock up?

RE: Transmission problems -- ECM the cause??
 

Our work truck, a 89' silverado, had similar symptoms and when we took it into the shop. It didn't hit third, didn't want to downshift and no reverse. It was a few years ago but all I can remember is that the cheapest alternative was a reman tranny.

RE: Transmission problems -- ECM the cause??
 

yeah....I'd like to bypass the computer controllled lockup if it is possible......not necessarily the easiest thing to do.....Is there a way to rig a switch which unlocks the torque convertor and bypasses the computer??? I have a standard transmission I could put in but making a standard fit where a automatic should be isn't easy either....