zippy

The 2wd's had 3.23's standard and 3.73's were an option. If it's a 4wd, it could be 3.42's, 3.73's, or 4.10's. I agree though, you either have 3.23's or you're over revving it.

joshua022

iTrader: (12)

8.5/8.6 10 bolt not 7.5

kw05silverado

iTrader: (1)

I do a lot of hw driving (50-60 mph only) for about 30-50 miles a day. is 410s worth it?

yea i probably do have 323s bc i cannot pass someone at 50 mph.. it downshifts into 2nd at a low rpm and i dont move. i will definitly get gears after the full exhaust.

zippy

What tire size do you have?

99Silverado5.3

iTrader: (7)

You will gain a good .5 sec off your 1/4 time 3.23s to 4.10s and actually increase mpg around town. Yes, it is 8.5/8.6 gm 10 bolt not 7.5.

silver-mod-o

iTrader: (15)

go with 4.10's.... I went from 3.42's to this ratio and will never look back...

kw05silverado

iTrader: (1)

stock, 245,70,17s, and when i get new ones ill get 285 70 17s.

thanks for all the help guys.

Ill probably go to the track with just the full exhaust and then 2 months later go with the eaton locker and 410s..and probably better tires..