GMT 900 Gear Swap

[scz71864]

I have a 2011 Silverado with the 6spd tranny. I also have 3.42 gears. I want to put on a set of 265/70/18s which is a 32.6 inch tire. I do a lot of city driving and i tow a good bit. Would it be worth changing to 3.73 gears or perhaps 4.10s??? I have read people have a huge low end power loss when going up a tire size with the 3.42 gears. Would a gear swap be worth it?? I plan on doing headers and tires around the same time so i would have one huge retune going on.

[Big Whiskey]

With only a 32.6 tire....and probably a light, P-rated one...you should be just fine. If you were doing a 6" lift and 35's, it would be different. You might notice a slight (very slight) hit in power and MPG, but not enough to justify the cost of a gear swap, IMO.

[cparks555]

Do you have a shop you trust to do the install? I as beacause I've been wanting to do this for awhile, just can't seem to find a reliable place to get it done right. I'm in SC also, thanks.

[Carder09]

Do you have a shop you trust to do the install? I as beacause I've been wanting to do this for awhile, just can't seem to find a reliable place to get it done right. I'm in SC also, thanks.

 

I was thinking the.same thing since I'm in sc, you in Columbia also?

[cparks555]

Do you have a shop you trust to do the install? I as beacause I've been wanting to do this for awhile, just can't seem to find a reliable place to get it done right. I'm in SC also, thanks.

 

I was thinking the.same thing since I'm in sc, you in Columbia also?

 

 

Murrells Inlet, have family in Columbia though.

[yukon25008.1]

Going 4:10 from 3;42 you will see a huge improvment!!

And be glad you did after, read some of the other posts about gearing.

[scz71864]

there is a shop that opened up in cola called CFS offroad. These guys are class A. Honestly i felt stupid for having them put in my 5100s because all these guys do is build hard core offroad rigs. Great guys great pricing great service. number for them is Jason- 615-916-1201 Mike 931-588-8719 or the shop 803-550-9411 email is [email protected]. You an also shoot them a text and give you more info.

[brainpause]

there is a shop that opened up in cola called CFS offroad. These guys are class A. Honestly i felt stupid for having them put in my 5100s because all these guys do is build hard core offroad rigs. Great guys great pricing great service. number for them is Jason- 615-916-1201 Mike 931-588-8719 or the shop 803-550-9411 email is [email protected]. You an also shoot them a text and give you more info.

 

 

those guys must have moved from the Nashville/Middle Tennessee area. Their cellphone area codes are from my area.

[scz71864]

youre right, they were in TENN for a while, but what from what they told me they had family down here.

[Carder09]

Sweet, will have to give them a call next year, I want 4.10's in my truck, have 3.23's right now , cant wait!

[cparks555]

Thanks for the heads up, going to check them out next time I'm in Columbia.

[ruggedlife]

i have the 3.42's as well, and i went with a full 33x12.50r20 and i'm less than pleased. my old truck was a 4speed trans but it had 35's with 4.88's and it was AWESOME i'm torn between 3.73's and 4.10's i'd love to know of anyone who went with a 4.10 with a 33

[yukon25008.1]

I have 4:10,s and 33,s.... but its a 5 speed allison.

In 5th on highway 70-75 mph is under 2500rpm,s

[scz71864]

it makes me mad GM went down on the gears when they put in the 6speed. trying to get the MPG's up as high as they can.

[scz71864]

Iv looked around and no luck so far on anyone thats gone up to a 3.73.