Allison limps after warming up - Chevy and GMC Duramax Diesel Forum
07.5-10 LMM Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 2 (permalink) Old 10-16-2019, 02:16 PM Thread Starter
Mattress99's Avatar
Join Date: Oct 2019
Posts: 1
Allison limps after warming up

First time posting, even though I've been getting help from u guys for years. Can't seem to find another thread with my same issue. Got a built 2010 ally, that goes into limp once it reaches about 125-130 degrees. It will throw a Solenoid C stuck (p0762) code every time. I can make it almost to work in the morning (25 miles) , with no issue. Drives strong and shifts like butter. But once I exit the freeway, and as it down shifts it will throw this code and stay in 4th. So I'm able to "limp" to work, about another 500 feet. Then on the way home, same thing. Make it most the way home, then when I pull into my neighborhood, it limps.

I've changed fluid, filters, and banged my head again my lift pump enough, so not sure the issue. Been this way for about a week.

2008 2500hd LTZ Z71
Built Trans
Deleted w/4 inch straight and CA intake
Air Dog Raptor 4G 150psi
5" Rancho Lift on 35" Open Country
Daily Driver

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post #2 of 2 (permalink) Old 10-17-2019, 08:44 AM
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407driver's Avatar
Join Date: Oct 2016
Location: Maurice, LA
Posts: 4,305
Id call whoever built the trans and get their opinion.

But here is a reply to a similar thread from the best in the Allison trans business:

2008 Silverado 2500HD CCSB LTZ Diesel
FASS 95 Lift Pump (with Baldwin filters), Edge Insight CTS Monitor on a Windshield Mount, Nicktane Fuel Filter Adapter w/ CAT 306-9199 UHE tertiary fuel filter, Bilstein 5100 Stock Height, Bushwacker Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, Dorman PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags.

Last edited by 407driver; 10-17-2019 at 08:47 AM.
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