How do I determine what transmission is in my truck???

465

Asked by Jun 06, 2012 at 06:49 PM about the 2007 Chevrolet Silverado 2500HD LT2 Crew Cab 4WD

Question type: Maintenance & Repair

I have an '07 2500 HD w/6.0L gas & 6 speed auto trans. In my owners manual, it lists two possible types of tranny's, a 6L80E, & a 6L90E. I was wondering how to tell the difference & WHAT is the difference in the tranny's??

3 Answers

236,975

I found this..."The 6L90 is the heavy duty version of the 6L80. The 6L90s come equipped in the 2500HD trucks. I also know the 6L90 has 34 spline instead of the 32 in the 6L80. The 6L90 is about 35mm longer than the 6L80." HTH's ..

3 out of 3 people think this is helpful.
465

Thanks Tom! So, 1500's come with a 6L80 then???

645

Yes a 1500 will come with the 6L80e. The HD trucks get the HD transmission (6L90e)

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