Allison Problem ? Solenoid ? - Chevy and GMC Duramax Diesel Forum

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post #1 of 4 (permalink) Old 03-18-2012, 07:04 PM Thread Starter
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Allison Problem ? Solenoid ?

Hi All, Recently I Had an Issue With the NSBU Switch, I replaced It with Original Allison Replacement Part, Selector Lights Working Fine a Week Later Driving Up Steep Grade Holding in 5th Gear, The transmission made a Thud noise, Engine Light came On Trans Mission Seemed to Stay in 4th Gear Would Not Up shift Or Down Shift After 30 Minutes Sitting with Engine OFF The Transmission Worked Fine Engine Light Stayed On... Could It Be A Solenoid Causing The Problem Case PSI To High ??? Any Ides, Trans Does Not Slip.... Im Stumped
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post #2 of 4 (permalink) Old 03-18-2012, 07:08 PM
Its just a worktruck
 
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What were the codes?

06 LBZ EC/LB 4x4
Built Motor/Trans • Bullseye s475/87/.9 • 45% Injectors • Stock CP3 • Built and Tuned by Blackout Performance • 11.76 @ 115
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post #3 of 4 (permalink) Old 03-18-2012, 07:20 PM
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sounds like a limp.... but you need to pull the codes? where you running a tuner? what size tires?? you need to fill out your sig for more help

2003 LB7 ECSB:
SDP S467.7, Kryptonite everything upfront, EFIlive from Kory, 40% overs, DSP through Edge CTS, Alligator Stage V Trans, BT Lockup Box, PPE Tranny cooler, AD 165, Cognito Traction Bars, 5" FloPro straight pipe, 20x12 -44 Black Rhino Glamis wheels, 35x12.5 Toyo AT2, Line-X Rockers
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post #4 of 4 (permalink) Old 03-19-2012, 10:22 AM Thread Starter
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P0735 code, 285/75/16 Stock Tune I Think, I Bought it Used Off GMC Dealer, They replaced All Injectors Due to Hard Start Issue 3 Months Ago (warrantee)

2003 GMC Sierra 2500 4x4x4, LB7, Allison 1000, Leveling Kit, 285x75x16 Hankook, Stock Tune, 2010 Silverado LBZ 2500HD All Stock For Now
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