2020 6.6L Gasser dyno pull

[Cowpie]

Well, if the demand shows up, there will be some outfit that will have E85 modification kits and tunes available at some point.  At least one can hope.  

[48548]

If the rear diff smaller on the gasser like it was in the past?

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[J-man67]

If the rear diff smaller on the gasser like it was in the past?

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I don't ever recall the rear end on the 2500s being a different size based on gas or diesel. Trans yes, but not rear end.

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[davester]

It's based on power.  Diesels generally can put more torque through the drivetrain, so they get bigger diffs.  My 6.0L gas gets a 10.5" pumpkin, but if it were a 6.6L duramax or the 8.1L gas, it would get the 11.5" one.

[J-man67]

That makes sense, I just never realized or noticed somehow. I pride myself on being pretty knowledgeable about all GM trucks. Current stable includes a 8.1L/Alison and a 6.0/6spd. I'm checking them out today! Thanks for the info!

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[MTU Alum]

6.6L gas is running 11.5" ring gear for 2020.

 

#iworkforGM 

[48548]

6.6L gas is running 11.5" ring gear for 2020.

 

#iworkforGM 

Thanks. Just curious, if i bought a new truck, i think i would want the srw 3500 just for full torque in all gears and the new 12" rear end on the dmax. I current have a 12 denali hd with 24k on the odo... waiting for the 21 for the interior refresh.

 

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[mjberg]

Has anyone dyno tested the 2024 Allison 10/1000 equipped Silverado HD 6.6 gas?  How much more Horse power does it take to turn that transmission than the 6L90E?  

Edited February 19 by mjberg