3.55 gears. Want to run 37's will I be ok?

LastChance · Apr 25, 2017

So I have a 2011 1500 4x4. Im going to do a 6in lift so I can run 37's. Am I gonna need to regear my truck or will I be ok with 3.55? Is there anything I will need to change with a 6in suspension lift? Sorry I'm green and don't know ****. I'm just trying to make a dream come true.

69GWC · Apr 25, 2017

If it was mine I would regear it for sure.

LastChance · Apr 25, 2017

69GWC said:
If it was mine I would regear it for sure.

What would you change it to?

RubberFrog · Apr 25, 2017

4.10 or 4.56

LastChance · Apr 25, 2017

Is it even possible with a 2011 4x4 or is it something that's going to cost a ridiculous amount?

Jwithing · Apr 25, 2017

Depends... Do you have the 8spd? Are you going to do any performance enhancement?

I'm running 37's w/ 6 inch BDS, 4x4, 8spd, 3.92, w/ vararam, and 93 hemifever tune. In 2wd launch, I get some wheel spin and have gotten skipping at gear shift. That's plenty of ass to move the tires if you ask me. Probably too much for me since I'm wanting to do the Whipple kit.

I say, if you have the 8spd. Get the tires and lift, but stay with 3.55 for a bit and see how you like it, unless your deciding factor is budgetary concerns. If you have the 6spd, probably a different story, but I'll let others who have more insight comment if that's the case.

Jwithing · Apr 25, 2017

Just thought about it, 8spd didn't come out till 2013, right?

69GWC · Apr 25, 2017

8sp dont come with 3:55s

I would do 4:56s for sure, not cheap but your transmission will thank you.

LastChance · Apr 25, 2017

Jwithing said:
Depends... Do you have the 8spd? Are you going to do any performance enhancement?

I'm running 37's w/ 6 inch BDS, 4x4, 8spd, 3.92, w/ vararam, and 93 hemifever tune. In 2wd launch, I get some wheel spin and have gotten skipping at gear shift. That's plenty of ass to move the tires if you ask me. Probably too much for me since I'm wanting to do the Whipple kit.

I say, if you have the 8spd. Get the tires and lift, but stay with 3.55 for a bit and see how you like it, unless your deciding factor is budgetary concerns. If you have the 6spd, probably a different story, but I'll let others who have more insight comment if that's the case.

I have the 6 speed. Gonna put a sb cold air, headers, full exhaust, tuner, etc.... budget really isn't a concern. I just want to make sure I do it right and get the best you can get.

LastChance · Apr 25, 2017

69GWC said:
8sp dont come with 3:55s

I would do 4:56s for sure, not cheap but your transmission will thank you.

What do you think something like that would run? Cost wise. Just curious so I can plan for for it

Burla · Apr 25, 2017

I hate my 3.55's, but I have cured it by running tow haul all the time on stock tires. I would say 3.96 and 4:10's are very similar, so if I didn't like the 3.55's, I would opt for 4.56 and up. That will really give you solid bite off the line, and with 37's you shouldn't being doing 80 on the freeway, so using a 4.56 will help you keep your freeway speeds down a bit. All of the guys with the older trucks have to go 4.88 and up depending on the engines. Because you have the Hemi, you can get away with 4.56, but a guy with a 302 would be opting for a 5.18.

3.55 versus 5.18, a picture is worth a 1000 words.

69GWC · Apr 25, 2017

I have not looked into that to much yet, but wpuld guess around 2gs.

quietpeen · Apr 25, 2017

LastChance said:
I have the 6 speed. Gonna put a sb cold air, headers, full exhaust, tuner, etc.... budget really isn't a concern. I just want to make sure I do it right and get the best you can get.

you have the 5 speed. the 6 speed didn't come out till 2012

grgreagreaga · Apr 25, 2017

If you are going to gear swap it (which you should) then get the 4.56. I bought mine before Moe's performance had milled limited slip diffs so I had to buy a new one and get it shipped off to a guy in florida to get it drilled out since the 4.56 gears are originally for the 3rd gens, not the 4th gens, but Moe's sells them now which brought the cost down a good bit.
You will be looking at around 3k parts and labor unless you have done gear swaps before and can handle the task.

HammerHead · Apr 25, 2017

LastChance said:
I have the 6 speed. Gonna put a sb cold air, headers, full exhaust, tuner, etc.... budget really isn't a concern. I just want to make sure I do it right and get the best you can get.

If $$ is no issue go 456 and throw a 2600 torque converter in the tranny. I think you will need to grind the rear housing to get the 456 to fit but I'm not positive on the 2011. There has been a lot of gear swaps done on this form so you should get some good advice.
I went 355 to 410 and love it, But, if I could do it over it would be 456. Gears are BANG for your buck. I have a 2x4.

Hemi450hp · Apr 25, 2017

Because of the 37's, I would go with 4.56's. You got lucky being a 2011 as you can just bolt in the aftermarket 8" front gears. The 2012+ trucks require an 07-11 axle, driveshaft, and 8" gears which about doubles the cost of the job.

Total cost of parts for your 2011 would be about $900 for front/rear 4.56 gears and front/rear master install kits.

HammerHead · Apr 25, 2017

Hemi450hp said:
Because of the 37's, I would go with 4.56's. You got lucky being a 2011 as you can just bolt in the aftermarket 8" front gears. The 2012+ trucks require an 07-11 axle, driveshaft, and 8" gears which about doubles the cost of the job.

Total cost of parts for your 2011 would be about $900 for front/rear 4.56 gears and front/rear master install kits.

Matt does he need to grind the rear housing to get the 456 to fit?

Rzrman328 · Apr 25, 2017

Dude....you'll be fine.

Are you gonna win races? No

Is it gonna be a dog? Sorta.

You don't HAVE to swap ****...but is advised if possible.

Hemi450hp · Apr 25, 2017

HammerHead said:
Matt does he need to grind the rear housing to get the 456 to fit?

Not with our double drilled 4.56 gears.

HammerHead · Apr 25, 2017

Hemi450hp said:
Not with our double drilled 4.56 gears.

OP there you GO; $900 for parts. No grinding, just find a shop to do the swap and your Golden.

3.55 gears. Want to run 37's will I be ok?

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