Diesel Tuner's Blog

Will a 6 Speed Conversion Kit Pay for Itself?

[fa icon="calendar'] Feb 8, 2018 10:03:00 AM / by Paul Wilson posted in better mpg for lly, how to get better fuel mileage with LLY, LLY mpg, LB7, Transmission Duramax, 6 Speed Conversion Kit

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6 Speed Conversion Kit for the LB7 & LLY 5 Speed Allison:

Your 2001-2005 Silverado/Sierra HD diesel is powered by either the LB7 (2001-2004) or LLY (2004.5-2005) Duramax.  That Duramax is tied to one of the most popular automatic transmissions, the Allison 1000.

While the Allison 1000 was a big step forward, it still needed improvement.  The LB7/LLY models came with 4 gears and Overdrive, or "5 speed".   In 2006 General Motors (GM) released the 6 Speed transmission for the new at the time LBZ model and other HD trucks. 

Without getting too technical about how automatic transmissions work, they did not actually add a physical gear.  The Allison works through a series of clutch packs being applied with hydraulic pressure to create different gear ratios.  What GM actually did was design a brand new valve body and improved tuning to achieve the 6 speed Allison 1000.

I need a 6 Speed Conversion!

DuramaxTuner.com now has a 6 Speed Conversion Kit which includes a new valve body and custom tuned TCM that allows your truck to achieve 6th gear.  

Who Will The 6 Speed Conversion Kit Help?

  • Owners wanting a quieter ride
  • Drivers looking for a smoother shifting transmission
  • Highway commuters
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Who Needs 6th Gear? LB7/LLY 6 Speed Conversion!

[fa icon="calendar'] Dec 20, 2017 10:00:00 AM / by Paul Wilson posted in LLY, LB7, 5 Speed, 6 Speed Conversion Kit

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5 to 6 Speed Allison Conversion:

The Allison 1000 transmission equipped in the 2001-2005 HD Silverado and Sierra was considered to be revolutionary when it was released. 

 

Owners rave about the smoothness and reliability of the 5 speed Allison transmissions.  They're able to reliably handle the strain of towing heavy and still have reasonable street manners for commuting.  Duramaxtuner has recently invested considerable time into the AL5 controller to build out the shift shedule and quality of all the 5-6 and 6-5 shifts.  Matched with our upgraded valvebody this kit will have your 15 year old truck shifting like a 2018 model. 

As most technology has advanced over the last 12+ years, so has transmission technology.  You've probably noticed that just about everything on wheels has more gears these days.  Starting in 2006 all Duramax powered GM trucks were given an extra overdrive gear (.61).  Since then, they haven't looked back. 

Why is that?  Why does your truck need more gears? 

Benefits from more gears:

  • MPG improvement 
  • Noise Reduction
  • Parts Longevity
  • Narrower Cruise range to meet Emissions Requirements
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