There was a time, not long ago, we had only the paper clip. Then, along came The Diesel Page....Quote:
Originally Posted by Bigrig594
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There was a time, not long ago, we had only the paper clip. Then, along came The Diesel Page....Quote:
Originally Posted by Bigrig594
The controller chassis part number can be the same for several models and years. However, the programming is different. Did you swap the EPROM from the old controller to the new?Quote:
Originally Posted by Bigrig594
Again, if you are getting engine related codes with your paper clip scanner, you have the wrong program or EPROM.
Yes, I swapped the eprom from the old controller. I'm no longer getting engine codes, just trans codes.
They're all for the internals of the trans from what I could tell. I should have the new one in after this afternoon. So I'll know for sure if it was a build issue.
The 4L80E is not a one tranny fits all.
There are subtle differences that cause issues.
A sensor that was not replaced could cause issues, as can the pressure regulator.
How old is the TPS on the Injection pump.
A flakey TPS can drive ya nuts and mess up throttle pressure and shift points...
If the TPS is not new REPLACE IT WITH AN AC DELCO
I replaced it with the in and output shaft speed sensors
What about the TPS on the IP ????
The one I replaced was on the intake... didn't know there was one on my ip
Sorry it was the ip not the intake.
The TPS fastens to the passenger side of the Injector pump and is coupled to the throttle shaft.
There is a small wire plug that plugs into the TPS.
A faulty TPS will/can cause many issues
Ok, got the new trans in. Still popping through 1st and 2nd gear. Parking brake light comes on now, cruise control no longer works, but I do have all gears now.
Pulled codes 85 trans gear error and 87 transmission gear ratio error.
New parts include input shaft and output shaft speed sensors, tcm, tps, and brake switch.
What is the tps supposed to be set at?
Ok, I have officially replaced every sensor, still having the same issue
My 93 had a similar problem. Turned out to be the ign. switch. Burnt corroded contacts. Not that hard to remove and disassemble and look at. Or you could backprobe the TCM connector C277 at pins C16, wire no. 439, pink/black for battery voltage through the ign. sw. The 2 grounds at that connector are C1, wire no. 450, tan/white and C2, wire no. 551, black/white. At the trans. connector, you should have battery voltage through ign. switch at pin C and pin K. Do_not_remove the connectors and check the voltages/grounds with them disconnected as the circuit will not be loaded and you'll get incorrect readings. I'll try to attach scans of the two connectors from the wiring diagram from my alldatadiy info. Good luck.
Refer to post #3. Have you verified the trans and TCM have good power?Quote:
Originally Posted by 56pan
Fixed the problem. Turned out to be the connectors and party of the wires for the speed sensors.
Good deal.
Glad you got it fixed...