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What's on your bench?

Sleeper

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'snip'

2001 GMC, w/built 6.0L and 4:30 gears.
IMG_0037-L.jpg

How much horsepower and torque for that 6.0 LS?
 

Dub11

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I've not had it on a dyno, but it should be around 500 at the crank.
Nice truck! Whats it have for a tranny? And 4:30 gears who made them? Usually its a 4:10 then a jump to 4:56 from what I could find.
 

blsnelling

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Nice truck! Whats it have for a tranny? And 4:30 gears who made them? Usually its a 4:10 then a jump to 4:56 from what I could find.
4L60E :eek: Its original except for shift kit and aluminum accumulator pistons.

Yukon, IIRC.
 

Dub11

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Don't jinx me! I know I'm on borrowed time with that kind of power in front of it with 105K miles.
Have you looked up gearstar? And don't forget the tcase.
 

Sleeper

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When you do rebuild that 4L60E, be sure to put a Sonnax Smart sun shell or "The Beast" sun shell in, they are designed to last, made from thicker metal, and heat treated so the splines that hold the sun gear don't strip out. And they are balanced for smoother operation.

Alto Red Eagle clutch frictions, and a Corvette servo piston for the brake band.

I do know a guy that is an expert with automatic transmissions... he would know exactly what to do to a 4L60E to make it take 600 hp all day long, forever.
 
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