Gear Ratio and 35's vs. 37's

[Jrock0311]

Hey everyone,

I'm about to start a build on my 2014 Ram Laramie 4x4. I'll be installing a Zone 6" and am looking to upgrade my tires and wheels. I'm torn between 35x12.50x20 or 37x12.50x20's. Im reading a lot saying that there can be significant power loss when going to the 37's unless I re-gear. I BELIEVE I'm running 3.92's right now but I need to find out for certain. Assuming I have 3.92 as opposed to 3.21, is it still necessary to re-gear to 4.10? Any thoughts as well as cost to re-gear would be appreciated! Thank you!

 

[gassersarentdead]

I'm running 37s on 3.55s. Dogged it down some, but I don't expect to have a lifted race car.

 

[The War Wagon]

Hey everyone,

I'm about to start a build on my 2014 Ram Laramie 4x4. I'll be installing a Zone 6" and am looking to upgrade my tires and wheels. I'm torn between 35x12.50x20 or 37x12.50x20's. Im reading a lot saying that there can be significant power loss when going to the 37's unless I re-gear. I BELIEVE I'm running 3.92's right now but I need to find out for certain. Assuming I have 3.92 as opposed to 3.21, is it still necessary to re-gear to 4.10? Any thoughts as well as cost to re-gear would be appreciated! Thank you!

3.92 to 4.10 is hardly worth the effort. If you have 3.92's, and are breaking 'em open, go 4.56. I'm running 35's with 4.56 gears, and it's a BIG help.

 

[xrsman]

I don't believe you can regear the 13+ rams yet. With the 3.92 rear end you'll see a hit but it won't be that bad.

Sent from my SM-G920W8 using Tapatalk

 

[R/T_Fire]

I don't believe you can regear the 13+ rams yet. With the 3.92 rear end you'll see a hit but it won't be that bad.

Sent from my SM-G920W8 using Tapatalk

I've heard this too, gears don't exist for the front diff from what I've read.

 

[Jrock0311]

Thanks for all of the info! I confirmed that I do in fact have the 3.92's installed. With that being said, am I going to run into any problems by going with the 37's instead of the 35's?

 

[Thatdude596]

In short no

 

[Rzrman328]

am I going to run into any problems by going with the 37's instead of the 35's?

Nope.

Doin it right now just fine.

 

[sausec17]

37's and 3.92s here too. Works fine for me, low end took a loss but with a tuner it helped out a lot. I wouldn't waste the money to re-gear, but that's just my opinion.

 

[Klaus96]

Need a whole new front axle assembly for 13+