2002 Tahoe transfer case problem; need advice
June 22nd, 2013, 9:43 AM
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2002 Tahoe transfer case problem; need advice
First time user on this site, but have always been a DIY'er.
2002 Tahoe 4WD switch stopped working and all switch lights went out and the "service 4WD" trouble light came on. It felt like it was stuck in Auto, so I took it to the dealer. They ran "trans Case Diag III" and got "no codes stored" BUT told me it was the TCCM and wanted $659. to replace it with NO guarantee that it would fix the problem. (Mechanic said it was not supplying 8 volts to the encoder module) So I ordered one on line for $160.and replaced it myself. I also ordered the dash switch and replaced that. No change.
Next I decided to replace the T/C encoder motor assembly and the front axle actuator. When I did that the T/C is now stuck in neutral.
What did I do wrong? Any suggestions on what I might have missed?
More info:
1) The 4WD switch lights flash on at start-up but immediately go out.
2) When I installed the new T/C motor assbly I had to turn the gear inside the T/C one click to line up. I did NOT turn the gear inside the new motor.
3) The TCCM did not have the same OEM number on it. I complained to the company that sent it to me. They said it was compatible and did provide a list showing that. OEM#12577410 vs. #15749703 (and I think it was a used part).
2002 Tahoe 4WD switch stopped working and all switch lights went out and the "service 4WD" trouble light came on. It felt like it was stuck in Auto, so I took it to the dealer. They ran "trans Case Diag III" and got "no codes stored" BUT told me it was the TCCM and wanted $659. to replace it with NO guarantee that it would fix the problem. (Mechanic said it was not supplying 8 volts to the encoder module) So I ordered one on line for $160.and replaced it myself. I also ordered the dash switch and replaced that. No change.
Next I decided to replace the T/C encoder motor assembly and the front axle actuator. When I did that the T/C is now stuck in neutral.
What did I do wrong? Any suggestions on what I might have missed?
More info:
1) The 4WD switch lights flash on at start-up but immediately go out.
2) When I installed the new T/C motor assbly I had to turn the gear inside the T/C one click to line up. I did NOT turn the gear inside the new motor.
3) The TCCM did not have the same OEM number on it. I complained to the company that sent it to me. They said it was compatible and did provide a list showing that. OEM#12577410 vs. #15749703 (and I think it was a used part).
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