Question about 2001 Chevrolet Silverado 2500HD

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Allison transmission wont change out of first gear and the spedometer stoped workin

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  • Chevrolet Master
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Check/replace your speed sensor and related wiring.

Posted on Apr 14, 2014

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Posted on Jan 02, 2017

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SOURCE: 01 duramax allison changed fluid and filters now in limp mode

Make sure you have the proper amount of tranny fluild in it and get that Valvoline fluid out of it. Allison transmissons have there own type of tranny fluid and you want to use it. You can buy the right stuff from a Allison dealer. Most Detroit Diesel dealers are also Allison dealers. Look them up in your phone book and they will tell you the quanity and sell you five gallon pails of the fluid. Just get the serial number off of the side of the transmisson before you call. Change the fliters again too. Believe me, this is important. My company has Yard horses with Allison transmissions and you don't want to screw with the small stuff. Service them right and they work as hard as you want.

Posted on Aug 09, 2009

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Take it to a tranmission shop to be road test , They don,t charge to do that,

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01 duramax allison changed fluid and filters now in limp mode


Make sure you have the proper amount of tranny fluild in it and get that Valvoline fluid out of it. Allison transmissons have there own type of tranny fluid and you want to use it. You can buy the right stuff from a Allison dealer. Most Detroit Diesel dealers are also Allison dealers. Look them up in your phone book and they will tell you the quanity and sell you five gallon pails of the fluid. Just get the serial number off of the side of the transmisson before you call. Change the fliters again too. Believe me, this is important. My company has Yard horses with Allison transmissions and you don't want to screw with the small stuff. Service them right and they work as hard as you want.

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No, have you changed the spin-on filter om the transmission yet? This may be the only trouble. I hope this helps. Good luck.

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