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Thread: Allison tranny problems
03-13-2010, 11:55 AM #1
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- Mar 2010
Allison tranny problems
I have a 2001 Silverado 2500 HD with the allison 5 speed. Today after running fine it just seemed to go belly up. It does not show what gear I'm in on the dash gear indicator and will not shift into gear properly. If I shift to first and then start shifting up manually it seems to work. Could this be the neut safety/ backup switch or a fliud problem 58k on the odo.
03-13-2010, 03:58 PM #2
It sounds electrical to me. Were you casual driving, or something different?
I don't have much experience with Little Alli, but with the dash out and no auto shift, it sounds like something came unplugged. I'd crawl underneath and look for loose plugs. Check for codes, too.
1999 Chevy K2500 Suburban 350
K&N, reworked cai, Thrush cat-backs
Vinyl, cranks, floor shift, and rear air!
03-14-2010, 09:14 AM #3Jim
2004 SILVERADO 2500HD LS
Pro Comp Leveling Kit
285-75-16 Cooper ST All Terrains
Pro Comp Programmer
Linux Bed Liner
1967 Landcruiser <350 Chevy>
1990 Geo Metro Convertible
2007 FJ Cruiser
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