35in tires what gear ratio?

**chevybulldog6** · 05-19-2009, 11:33 AM

I have a 2005 z71 crew cab with a procomp 8in suspension lift kit running 35in tires with the stock 3.73.gears. I am wanting to regear the axles but am unsure what ratio to go with. I am torn between 4.10 and 4.56s. Anyone with first hand experience or just any help would be nice.

**dwill3015** · 05-19-2009, 02:30 PM

Welcome to the site! We have had this discussion before and the verdict was the 4.56's would be your best bet as the 4.10's would only be a slight difference from your stock 3.73's so if you are going to spend the money to re-gear, go with the 4.56's.

**masterfoxscout** · 05-19-2009, 04:46 PM

Originally Posted by chevybulldog6

I have a 2005 z71 crew cab with a procomp 8in suspension lift kit running 35in tires with the stock 3.73.gears. I am wanting to regear the axles but am unsure what ratio to go with. I am torn between 4.10 and 4.56s. Anyone with first hand experience or just any help would be nice.

I have some experiences

What do you plan on doing with the truck? Is it a DD or are you going to actually use instead of it being a parking lot queen?

If you are going to be using it as a DD, then I'd suggest 4.56s. 4.56s will regain the lost torque and low end power caused by lifting the vehicle and adding the larger tires but it will keep you on the fuel efficient side.

4.88s would be an excellent choice for you if you plan on going to larger tires, such as 37s, or if you are going to be using this thing off road.

In my opinion, 4.10 isn't even an option here. If you are going to spend the money to have the vehicle regeared, then go with 4.56s or 4.88s. You will be very happy that you did. Once I got my truck regeared, it was like night and day. Now, I can bark tires driving down the road and spin the crap out of them from a stop.

Regear, your tranny will thank you in the long run!

**chevybulldog6** · 05-19-2009, 07:00 PM

Originally Posted by masterfoxscout

I have some experiences

What do you plan on doing with the truck? Is it a DD or are you going to actually use instead of it being a parking lot queen?

If you are going to be using it as a DD, then I'd suggest 4.56s. 4.56s will regain the lost torque and low end power caused by lifting the vehicle and adding the larger tires but it will keep you on the fuel efficient side.

4.88s would be an excellent choice for you if you plan on going to larger tires, such as 37s, or if you are going to be using this thing off road.

In my opinion, 4.10 isn't even an option here. If you are going to spend the money to have the vehicle regeared, then go with 4.56s or 4.88s. You will be very happy that you did. Once I got my truck regeared, it was like night and day. Now, I can bark tires driving down the road and spin the crap out of them from a stop.

Regear, your tranny will thank you in the long run!

Yes it is a daily driver but I only put maybe 10-15 miles on it per day at the most. I do take it out every now and then probably would go out more often if it was regeared. I have thought about going to 37s in the future but I dont feel the 10bolt axle will be strong enough. With your truck are you happy with the 4.56s or would you rather go with the 4.88s? Thanks for the help.

**masterfoxscout** · 05-19-2009, 07:33 PM

I'm very happy with it. The original plan was to go with 4.88s, but they couldnt get them in, in time. If you wanna take it off road, and are only going 10 miles to work, then I'd go with the 4.88s. Especially, if you are toying with 37s.

From what I've read and what I've asked on these and other boards, there are a couple of people that are running 37s on the 1/2 ton axles with no probs. Everyone has told me to do it, just not to stomp on the gas running down the highway and not to take it off road and beat the hell out of it.

I think I'm gonna do it.

**Knucklehead** · 05-19-2009, 08:16 PM

Originally Posted by chevybulldog6

Yes it is a daily driver but I only put maybe 10-15 miles on it per day at the most. I do take it out every now and then probably would go out more often if it was regeared. I have thought about going to 37s in the future but I dont feel the 10bolt axle will be strong enough. With your truck are you happy with the 4.56s or would you rather go with the 4.88s? Thanks for the help.

4.88 gears would be nice either way , im running 4.56 with 35s and im happy with them. As far as 37s go i dont know if i would be willing to try after a buddy of mine burnt up his 10 bolt rear running 37s ,but 2 things that may have contributed is the tires were 37 x 15, and it was a suburban so it was pushing a little more weight. True , it may be fine if you dont punch the gas hard, but how can you resist at times lol. Not to mention if your towing anything your chances are greater for damaging your axle.

**retired** · 05-19-2009, 08:24 PM

4:56 gears work the best for 35's

**12pack** · 05-19-2009, 10:10 PM

I just installed 4.56's in my 97 chevy with 35's and I turn 1900 RPMs at 60 MPH. I love the ratio for driving back a forth to work. ( 26 miles one way) I highly recommend the 4.56's, you wouldn't even notice the difference between 3.73 and 4.10

**masterfoxscout** · 05-19-2009, 11:35 PM

Originally Posted by Knucklehead

As far as 37s go i dont know if i would be willing to try after a buddy of mine burnt up his 10 bolt rear running 37s ,but 2 things that may have contributed is the tires were 37 x 15, and it was a suburban so it was pushing a little more weight.

That is what scares the hell out of me. I've heard a bunch of people saying that they do it, but there is the chance for axle failure which I do NOT want to deal with.