blownlt1bird

Hi guys I have a 09 sierra crewcab 4x4 5.3 6 speed tranny and Im looking at changing the gears. It now has 3:42 and Im thinking of 4:10 and was woundering what you guys thoughts on this might be. I was also woundering if I do swap gears how I correct the speedo for the gear swap

Thanks in advance

06Sierra2

why are you looking to change gear ratios? do you tow? with a 4x4 and having to change two sets id prolly look into some other mods first. but if you do the swap a simple tune will correct the speedometer, abs and any other small issues you may run into. do you have a custom tune already? if not i would look into that before a gear swap

blownlt1bird

Yes Iam looking at swapping the gears for towing I dont have a tune yet but do have a diablo handheld programmer and Im not sure if it will handle the gear swap What other mods would you recommend doing if I dont do the gear swap? The problem I have is that I can be crusing down the road (empty) and come to the smallest grade and it will shift down into 5th and sometimes 4th I have pulled trailers with the truck and find it even worse when Iam towing.

rjwz28

I can tell you that you will like the swap, but it will be a hefty bill. What size tires are you running?

BrutalSierra

iTrader: (1)

The gears will make it alot easier to tow. I'm guessing you have the predator handheld which will allow you to change your gear size and tire size.
A custom tune will help alot, however you can also get a custom tune for your handheld through Diablewtune.com which is just like a blackbear minus the transmission settings. I had a diablew tune on my truck before and it ran great!

blownlt1bird

Right now Im going to be sticking with the stock tires and rims and yes I do have a diablo handheld programmer and figured it would handle the gear change but havnt actually plugged it into the truck to check what I can change with it thanks for the responces guys
And OH yes it is going to be costly about 2 grand

NKPPhil

YEEEEOWTCH!

Nick™

iTrader: (2)

there is no way I would want 4.10's with stock tires and a 6 speed
first gear is going to be retarded low

rjwz28

People here with 4.56s and 4.10s might disagree

rjwz28

There's a couple guys who are running 4.10s with the 6L80E or a 6L90E and they're quite satisfied with their decision.