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Thread: 2002 silverado 2500hd 8.1/allison help please

  1. #1
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    Jun 2011
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    2002 silverado 2500hd 8.1/allison help please

    Having a issue with truck not sure if it cam or tune related. engine has 218/224 116+3 .552/.544 cam, LT, ported stock intake,90mm Tb, running 44' boggers 2.5 ton rockwells 6.72 gears
    truck will not accelerate if truck is a bind "thick mud/tug pad" tps will only go to 20% . truck can be hi/lo range if tires don't move it wont go anywhere. any help would be greatly appreciate
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  2. #2
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    Quote Originally Posted by mhotrodscooter View Post
    Having a issue with truck not sure if it cam or tune related. engine has 218/224 116+3 .552/.544 cam, LT, ported stock intake,90mm Tb, running 44' boggers 2.5 ton rockwells 6.72 gears
    truck will not accelerate if truck is a bind "thick mud/tug pad" tps will only go to 20% . truck can be hi/lo range if tires don't move it wont go anywhere. any help would be greatly appreciate
    heres a load file hooked to a tree in my back yard, low range actually cuts rpms in half
    Attached Files Attached Files