Bully Dog Shift Enhancer #153001

2001-2005 GM 6.6L Duramax
XDP Part Number:
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The simplest, most effective kit available without having to pull the transmission, the new Allison Shift Enhancer literally gives the clutches more traction in the clutch packs. Which allows for a quicker shift, and 50 HP worth of additional holding power for the Allison 1000, 2000, and 2400 transmissions.


  • Increase Transmission Life
  • Lower Transmission Temperature
  • More Advanced Shift
  • Longevity of Transmission
  • Reduced Torque Converter Clutch Slippage
  • Extra Rear Wheel Horsepower
  • Cost Savings in Transmission Repairs
  • Economical


  • Transmission holds higher horsepower and torque
  • Increases the life of the transmission
  • Better clutch, horsepower and torque transfer to the wheels

Bully Dog 153001 Installation Guide

Mfg. Number:

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(20 Ratings, 1 Review) Average Rating:
Anonymous (Unknown) 2/18/2007 12:07 AM
this is a good product and installs easily in a short time. it does as advertised with a van aaken 90 150 box my trans did not want to shift if I tried to leave on the 150 and now it shifts and seems to hold the power much better than before also the converter locks up much more quickly than before all in all this is a good choice if you don't plan on going crazy and just want around a good 150 extra horses this will allow your trans to hold up much better. it also does much better if you put the truck in tow haul mode before you go ripping off quarter mile passes..