caviness

iTrader: (12)

2007 gmc rcsb classic going to install my ls2 and 4l60 out my Camaro in truck. the engine made 450rwhp in Camaro thru the 4l60 and 9in with 4.10s. my ? is what gear for truck with trutrac and will the factory rear hold up or should I look for a stronger rear. the truck is just going to be street toy and drove a lot might see track 1 or 2 times year.

caviness

iTrader: (12)

im a little new to the truck hotrod thing but im thinking 4.10 or 4.30 but not sure truck is rolling on 20s for now. im hoping the stock rear will hold up with new stuff in it.

RS/SS 4.8

iTrader: (13)

Stock rearends on these trucks are the 8.6 10 bolt. Plenty of people on here pushing 800hp+ on them. Depending on your tire size and what the intended use is

Smaller than 31" tire go 3.73
Taller than 31" tire go 4.10
Taller than 34" tire go 4.56

I copied this ^^^ off a different post.

Personally i run 4.10s on a 31" tire and when i daily drove it in the city it helped a ton but on the highway im seeing 2300rpm at 70mph.

caviness

iTrader: (12)

ok so the rear will hold the power and not break axles and stuff if I decide to through some dr on it and hit up the track a few times.

caviness

iTrader: (12)

will the axles hold up ok on some dr ??

GMCtrk

iTrader: (27)

I thought mine was holding up until I discovered a twisted axle. One more hard hook and it probably would have snapped. Need 9"

caviness

iTrader: (12)

who builds 9in that bolts in and uses all factory breaks and hookups

tgui

What about a 14 bolt FF or SF?

caviness

iTrader: (12)

a 9in probably use less hp than a 14 bolt