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05-06-2016, 12:57 PM | #1 |
Registered User
Join Date: Mar 2014
Location: Redwood City
Posts: 242
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4l80e not shifting, no speedo
Parked my 91 to swap the doors out for a power set and do a little work on the glow plug wiring. Everything went as I would expect but when I put the dash all back together and ran the truck it wont shift gears and my speedo stopped working. I changed the output speed sensor and there was no result. Before I throw anymore parts at it I'd like to just make sure I'm barking up the right tree. Can anyone give me a troubleshooting process to follow, to identify my problem? I'd really appreciate any help.
I also noticed that the wires from the output sensor had been repaired in the past near the trans, is there any reason not to re-run them from sensor all the way to pcm to just ensure they do what they're supposed to? Edit to add: the truck is an R model so it's a square body and has a square body gauge cluster if it matters.
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1991 R3500 3+3 C+C 6.2/4l80e/14ff Fleetside Dually 1992 K2500 ECLB 5.7/4l80e/14sf(g80) 8600gvwr 1991 CR500 (95 Burb wouldn't stop catching fire ) |
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