gears or cam

i recent installed a new edelbrock intake, had heads ported, new cam, cold air intake, headers, true duals on my 06 5.3L! 06 crew cab engine makeover - The 1947 - Present Chevrolet & GMC Truck Message Board Network
we dyno tuned it this weekend and got 384 hp and 345 on the torque. Im running 22 in wheels. It runs good on top end but has no pulling power or nothing out of take off. I have 3.42 gears. my dyno guy said he would start with a shorter gear prior to changing cam. Do you guys think a 4:10 would be geared to low or do you have any other suggestions.

4.10s would be a good start. Heavy truck and likely some tall tires so you might even consider a 4.30 or 4.56

Before you randomly start throwing parts at your problem, tell us more about your setup - the cam you installed, the stall speed of your converter, etc.

My guys run 31" tires with 22"s the wheels are HEAVY.... we run a 4.56 gear... if you want to go fast with BIG wheels its a must

gears.........

yep a 31 inch tire is what i'm running. the tranny is stock, i'll get the specs on the cam!

Cam specs matter... but really dont... you just moved your power band up with the camshaft... and you need gear to help pull the rpms.. and get it up quick...

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Originally Posted by casey23

Cam specs matter... but really dont... you just moved your power band up with the camshaft... and you need gear to help pull the rpms.. and get it up quick...

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That's kinda what i was hoping to hear!

is there a donor vehicle that i could just get the complete rear end out of? I've heard some of the suburbans had 4:10 gears?

4.10's will be fine. you prob have 3.42's
what cam? what stall????

nm.. see stock tranny.. thus stock stall?

yea...the build sheet says it's a 3:42. I haven't done anything to the tranny!

hey casey your guys like the 4.56s? thats what im wanting to put in my swb 2wd escky. im on 22'' and my tires 305-45 about 31 1/2 overall. ill be moving down from a 3.73. mostly curious about interstate driving and mileage increase/decrease after combineing the gears after the bigger wheels/tires. hopefully this not hijacking

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Originally Posted by sloCaddy

hey casey your guys like the 4.56s? thats what im wanting to put in my swb 2wd escky. im on 22'' and my tires 305-45 about 31 1/2 overall. ill be moving down from a 3.73. mostly curious about interstate driving and mileage increase/decrease after combineing the gears after the bigger wheels/tires. hopefully this not hijacking

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what kinda rpms you running at like 70 or so with that gear/tire combo? I have the same size tire and wanted to do 3.90s

2100/2200 my truck is such a turd off the line id give up lower cruising rpm's for a little take-off.

fyi...this is the cam i went with!
Comp Cams 212/218 LSx Cam "HIGH LIFT"

a) get a hi stall torque converter...

b) the yukons/suburbans/some 1500HDs had 4.10s stock, but you're still going to have just a g80. Ron's gearshop can get you a true-trac and a set of gears for 600 to your door. Then you just need to have them installed. Most rears out of a boneyard are atleast 500 now a days for these trucks, so you're probably better off rebuilding yours.


If not search for the RPO codes. I used to have them memorized, but can't remember now. The stick is in the glovebox. Tells gear.

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Originally Posted by oleshifty

a) get a hi stall torque converter...

b) the yukons/suburbans/some 1500HDs had 4.10s stock, but you're still going to have just a g80. Ron's gearshop can get you a true-trac and a set of gears for 600 to your door. Then you just need to have them installed. Most rears out of a boneyard are atleast 500 now a days for these trucks, so you're probably better off rebuilding yours.


If not search for the RPO codes. I used to have them memorized, but can't remember now. The stick is in the glovebox. Tells gear.

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Who's this ron guy?

ronsmachiningservice.com Awesome guy and extremely helpful!!

So what did you end up going with? I have a 06 5.3 CC Silverado with 22's. Its a turd off the line and i want to jump to 4.10 or 4.30.

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Originally Posted by jbelton2

So what did you end up going with? I have a 06 5.3 CC Silverado with 22's. Its a turd off the line and i want to jump to 4.10 or 4.30.

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Im curious to know as well...