Quote:
Originally Posted by NJ Torque
If 2008+ the 2500 comes with a 6L90E. If 2007 and below has a 4L80E, IIRC.
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Trans changed with the body style in the 3/4 ton. The 6 liter/4L80E tows like a mushy pedal pig with a lot of weight and do poorly on fuel.
The 8.1 was known to burn tremendous amounts of oil between services.
The 6 speed 6L80E (or is it actually the 6L90E) with the 6.0 tows much nicer and does a phenomenal job of engine braking.