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SKU #: FPE-TAPSHIFTER35 MPN #: FPE-TAPSHIFTER35

Fleece Performance TapShifter 01-05 6.6L GM Duramax

$399.00
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Description
Gain control of your transmission's gear selection like the 2006+ Duramax trucks with this factory looking kit from Fleece Performance!The Fleece Performance TapShifter allows you to shift your 2001-2005 Allison Transmission with the touch of a button just like the 2006 and newer trucks. Perfect for towing, drag racing, daily driving and everything in-between, the TapShifter installs in no time and provides factorylike operation, functionality and styling. INSTALLATION: The TapShifter installs using OEM high quality connectors for a completely plug and play installation in less than 30 minutes. OPERATION: TapShifter operation is very straight forward. To downshift depress the "-" button on the shifter. To upshift press the "+" button. The TapShifter will allow you to select a range with the shift lever and then tap up and down without worry of tapping to a higher range than selected. This feature is great for sled pullers who do not want to shift to 4th gear on the track! IMPORTANT NOTE:01-02 models will require TCM Re-Flash to enable overdrive lock-out and proper function.
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Gain control of your transmission's gear selection like the 2006+ Duramax trucks with this factory looking kit from Fleece Performance!

The Fleece Performance TapShifter allows you to shift your 2001-2005 Allison Transmission with the touch of a button just like the 2006 and newer trucks. Perfect for towing, drag racing, daily driving and everything in-between, the TapShifter installs in no time and provides factorylike operation, functionality and styling.

INSTALLATION:
The TapShifter installs using OEM high quality connectors for a completely plug and play installation in less than 30 minutes.

OPERATION:
TapShifter operation is very straight forward. To downshift depress the "-" button on the shifter. To upshift press the "+" button. The TapShifter will allow you to select a range with the shift lever and then tap up and down without worry of tapping to a higher range than selected. This feature is great for sled pullers who do not want to shift to 4th gear on the track!

IMPORTANT NOTE:
  • 01-02 models will require TCM Re-Flash to enable overdrive lock-out and proper function.
Manuals and Guides
Vehicle Fitment
2001-2005 6.6L GM Duramax LB7 / LLY
WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
FEATURES & BENEFITS:
  • Easy Plug Play Installation
  • Limits Up-Shifts
  • Overdrive Disable*
  • Command Downshifts
  • Decrease Gear Hunting
About Fleece Performance Engineering
Browse Fleece Performance Engineering Parts Online by Make, Model, and Year.

Fleece Performance Engineering is a customer-centric diesel performance company that specializes in the development and manufacturing of innovative and extremely forward-thinking products to improve upon the performance and reliability of your Cummins, Duramax, or Powerstroke. Originally operating from a shop on their family farm, they have now grown to a full-scale operation that excels in air and fuel-related components for light-duty diesel. A continuous focus on product quality and the creation of new design principles before the competition is what keeps Fleece Performance growing by leaps and bounds year after year and at the forefront of the winners circle. Many know Fleece for its line of Cheetah Turbos, PowerFlo Lift Pumps, and 10mm Stroker Pumps, but it goes far beyond! From the simple, yet widely popular exhaust manifold stud kits that eliminate the troublesome factory manifold hardware to full-blown race engines via their Freedom Racing Engines division, they are truly a "one-stop shop!" And no, Fleece isn't "just" for the hot rod diesel market, they've got kits and components for every level of diesel truck owner.

TIMELINE OF FLEECE PERFORMANCE ENGINEERING:
  • 2008: Fleece Performance Engineering was established in North Salem, IN by Brayden and Chase Fleece. Both had a passion for continuously innovating and improving upon products already on the market. Brayden's 2004.5 LLY Duramax became the test bed to develop the TurboBrake and Duramax Cheetah, while Chase's 2002 Cummins was one of the first Cummins pickups to integrate an Allison Transmission.
  • 2012: Fleece Performance upgrades both facility and location by relocating to Nitro Alley in Brownsburg, IN situated among some of the top racing leaders in the world.
  • 2014: Fleece Performance acquires the area's premier engine machine shop, Freedom Racing Engines. The acquisition enables Fleece Performance to expand the engine development program and product offerings. Today, Fleece Performance and Freedom Racing Engines build some of the most competitive engines in the industry.
  • 2018: Fleece Performance breaks ground on a new 75,000 sq. ft. facililty in Pittsboro, IN.
  • 2019: Fleece Performance and Freedom Racing Engines relocates to its new facility in Pittsboro, IN. The all new headquarters provides additional space for product development, production and work areas, assembly and testing, a larger warehouse, as well as four engine dynamometers, and two-story office space.
  • 2020: Fleece Performance receives ISO9001:2015 Certification.
  • 2021: Fleece Performance Engineering was voted as one of the Best Places to Work in Indiana by the Indiana Chamber of Commerce.
  • 2022: Fleece Performance Engineering was voted again as one of the Best Places to Work in Indiana by the Indiana Chamber of Commerce.

As always, if you have any questions about which Fleece turbo, fuel, engine, or other product is right for you, do not hesitate to give us a call and we would be happy to assist.

Overall rating: 5.0 / 5 from 7 reviews.

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Reviews

Added to my 2004 w/ 6sp VB

"I missed having the tap shift like my 05 Duraburb has. Works like it should, installed it in my 04 compound truck with the No Zone 6sp conversion."

Adam M. (5/5)

2005 GM 2500HD Duramax / Allison w/6-speed kit.

"Quick easy install. Works as advertised, even with 6-speed conversion kit. Love the control we now have over gear selection when towing. Our 2005 GM 2500HD now drives & operates like our 2008 GM 2500HD."

Kurtis K. (5/5)

A+++++

"Looks and Works GREAT! Wife loves using it in traffic and for nighttime pulls LOL"

David R. (5/5)

this is so cool to be able to drive this truc. . .

"this is so cool to be able to drive this truck the way it is meant to drive not live in OD all the way up the mountain not sure why GM didn't do this from the factory"

Eileen R. (5/5)

'Purchased this in December 2014 for my 2003,. . .

"'Purchased this in December 2014 for my 2003, 2500HD. This is by far one of the best upgrades I have ever done to my Chevy diesel. However, I spent an additional 1. 5 hours sanding the shift lever mating surface because it did not line up with the existing torx screw hole. If that had not been an issue, the installation would have been truly, plug-n-play. However once done, everything worked flawlessly as advertised. Prior to this, my only downshifting was done via the tow-haul button and I lived almost exclusively in the D mode. Now I can downshift or upshift as needed to meet any road condition. If you are considering upgrades to your Duramax, I highly recommend this Fleece Tap Shifter be at the top of your short list!"

Katie H. (5/5)

Easy install. Performs the way GM should have. . .

"Easy install. Performs the way GM should have done it in the first place. Highly recommend."

Tania T. (5/5)

Fairly easy install, works great. Overdrive l. . .

"Fairly easy install, works great. Overdrive lockout + flawless shifting. Thank you!"

Shea R. (5/5)

Q&A

Just installed my tap shift I ordered from you guys on my LLY duramax, works great for towing up hills where I need to shift down a gear to maintain speed. Should I also be able to shift up a gear at low speed with this? There are times where it would be nice to force my tranny to shift up to second gear sooner than it does. Thanks!
The tap shifter will allow control over the highest gear, similar to how manual mode works on the newer transmissions. That being said it won't "force" a shift that is harmful to the transmission, so if the truck is going too slow for a specific gear it will ignore the command until its safe to shift.
Will I still have the regular drive option or will it be manual shifting all the time?
It will operate regularly until you use it to downshift. To go back to regular shifting you will click back up to Drive. -Sands
Will this tapshift kit work in a 05 lly with a 6 speed conversion?
It would be best to give us a call so we can get you setup with the correct part. 888-993-4373 -MC
I was looking at the tap shift for my 04 lly. Was wondering if I can buy just the harness because o already have a handle from an 06
We only sell it as the kit, I don't have the individual components unfortunately.