4.88 aren't really weaker. You just have to buy quality gears. 5.0+ gears are used all the time in drag racing with engines pulling over 1000 HP. It's all about quality and price. The leverage against the pinion gear is increased, that is why failures occur on higher numerical gears.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
I had 4.56 in my '66 with a 31 inch tire. When the bearing went out I had 4.10 put in and I couldn't tell the differance, at the time it was pushin' 450hp
http://i10.photobucket.com/albums/a1...dited-copy.jpg
2007 Sierra crew 5.3 4wd, stock for now
2004 Sierra scsb 5.3 - sold
02 Z28 SLP cold air pack, Corsa exh, Center Force dual friction + 23 lb flywheel
66 Chevy C20 (collecting dust)
Well I have already ordered them. Thanks for all the info. As far as hp rating, I have headers, soon to be nelson tuned with hot tune 93 octane, soon to be 4.56's , K&N cai , also just purchased servo kits, and will be putting a 2800 stall. That'll be pretty much it. I will be pulling a twenty foot bullet bass boat from here to toledo bend pretty often so the 4.56s shouldn't be a problem. Once the motor goes and my extended warranty ,there is no telling what I will do. Maybe a 6.0 swap with a beefier trans.
2000 Chevrolet Silverado, 4.8L, K&N polished intake, 4.10 gears, 20x9 KMC SS on front, 22x10 on rear, Dual style pillar gauges, steel cowl hood, 2" rear drop shackles, true duals w/IMCO extreme mufflers w/dumps at rear end, SLP headers. Cam and nelson tune soon to come!!!!!
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