smiths_3

iTrader: (1)

Is it worth the money to do this mod. I'm sure I can pick up some cheap 3.73s and I know a guy who can do the swap pretty cheap. Are there really any gains? Some people say you can't tell a difference but some some say you can. I'm running 275/45/20 tires and will be getting a TB stall once the tranny breaks.

bluecajun5.3

iTrader: (31)

i'd say some 4.10's but it all depends on what you use your truck for. like city/hwy driving, towing, or set up for the track. i went from 3.42's to 4.10's with an eaton and i love them. i do a lot of interstate driving also and my rpms at 70 increased around 350 rpms. i'm sure some other guys on here can help you decide...

The_Mexican

I think it's a good swap, I've had a truck with 3.73 and the one I have now is 3.42 and I really feel a big difference, but it just depends in where do you drive, i think 3.73 is a good all around gear. If you're going to drag race it all the time, 4.10 or 3.90 is your best bet, if you drive on highway a lot, then the stock or 3.73 is the best thing to do.

2nd Sierra

iTrader: (2)

go straight to the 4.10's. I did this on my old tahoe and was very pleased with the results.

nightmarechevy

iTrader: (5)

I would say to go with the 4.10s, it would probably cost a lot for the install and you wouldn't notice too much of a difference with 3.73s. If you can get it done cheap then yeah, but otherwise I would do 4.10s.

hyper

in my opinion the happy medium is the best, which is 3.73s. i had 4.10s on my old truck and it was kewl when i first got em, but then i just wish i had the 3.73s back

smiths_3

iTrader: (1)

I mostly drive on 55mph highways. Not much interstate stuff. There are no big tracks around here so i don't race much. I just want a little more low end but i dont want my gas mileage to suffer.

nightmarechevy

iTrader: (5)

In that case, 3.73s would help much more than the 4.10s. The mileage does suffer more with the 4.10s and high end power is much lower.

silveradosam

I just swtiched from 3.42's to 3.73's and i like the results. It has better take off and seems to have more low end. And now i can powerbreak my tires and with the 3.42's i couldn't.

smiths_3

iTrader: (1)

I think I have decided to try the 3.73s out. I have heard they are good with a TB stall. BTW about when do the stock 4L60e transmissions go out. I have 83,000 on my truck now.