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Discussion Starter #1
Was playing with the truck this weekend. I have rarely used my click shift feature. My truck is a 2006 with the LLY. I assumed it had a 5 speed. But I put it in manual at 60 mph and it showed it in 6th. So I clicked down and RPM jumped about 300. I clicked down for 4th and rpm hit about 2400. The main question I have is did they put the 6 speed behind the LLY. Cause it sure seems I have one. I did think they did the 6 speed till the LBZ.
 

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ALL 2006 Duramax trucks came with the 6 speed! In fact the 2006 LLY is exactly the same as a LBZ-- except they put a mild tune in the computer. ALL parts are the same.
 

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your truck is a LBZ motor with an LLY tune that is why you have the 6speed
 

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Discussion Starter #4
Thanks guys, I knew about the motors but not transmissions. :)
 
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