03chevy5.3rcsb

iTrader: (5)

Ok, for all you guys wondering what to put in, this is a good combo.Subtle but noticeable difference. But my question is what is the break in process for this?

Coban

iTrader: (14)

500 miles then change fluid.

ineedatruck

how much should i expect to pay for 4.10s installed? my truck has 3.23s and big fat tires on 22s

tdrumm

iTrader: (18)

Glad to hear that you can feel a difference. I'll be doing the same swap soon.

Derek @ EDO

iTrader: (73)

Drive it like ya stole it!
or at least i did and mine are fine!!

You are not going to break them if they are set up correctly.
IMHO

03chevy5.3rcsb

iTrader: (5)

I paid $1230 for the tru trac and gears installed with a girdle by a well respected shop

04GIBBS

iTrader: (11)

I thought there was only like a 250 RPM difference between the 373 and 410?

KySilverado

iTrader: (7)

It's not so much miles as heat cycles. Try and get as many heat cycles in as you can in about 500 miles. Then change fluid. Take short trips and let it cool off between them. This work hardens the gears.

I really love my swap. Same 3.73 -> 4.10. Like you said subtle but noticeable. Really fun around town.

03chevy5.3rcsb

iTrader: (5)

on the freeway i saw like 200 rpm difference, which i probably wont even notice in gas mileage. around town though is more noticeable alot better feel. i was worried about it being too big, but i think 4.30 would even be very streetable.