JKDriver07
New member
Thinking about running 37s on my JK. Will this be a problem for my stock axle?
37s
- Thread starter JKDriver07
- Start date
Davwashere
New member
Short answer is yes, unless you have a pavement princess. It may not fail right away, but it will eventually fail.
2013rubirick
Hooked
how would you know. It's not like yours running 37's on a d30 with an ARB locker. Who in their right mind would do that?
Danger
New member
To start of, I am building a 60 for the front, but I have had to deal with a high pinion 30 for a few years now. I did all normal upgrades to make it work. I run 37 14.5 irocks with a Detroit . I try not to bounce it real hard or stomp pedal when I'm binded in a turn. That sort of good practice anyway. Like I was saying, I am going to a 60 but I have been surprised at the amount of wheeling my 30 has taken.
CRAZYCASEY
New member
You will get all kinds of answers based on the type of wheeling people do. I could not stop breaking chromolly axles in a D44 with 37s and I am not a throttle junkie.
channa371
New member
Was your D44 beefed up at all or stock?
IMO the Achilles heel of a D44 (rear) is the flange and outer bearings. Even a stock JK can push the GWR of a D44 axle. Add armor and gear and you are overloading it. The most common failure I've seen (and experienced) is bent flanges.
Running larger tires and/or less backspacing increases the leverage on this already weak point. The main reason I want a D60 in the rear is for the higher GWR. If a full float D44 were available I would likely go with that...
Many aftermarket shafts are made of a material that had better memory characteristics so when the flange bends it returns. This has gotten me by thus far, but as I continue to add weight to my rig I'm not sure for how long. This said, I just recently went to an ARB rear locker with 35 spline shafts and they are WAY more beef than the stock 32.... :fingers crossed:
Running larger tires and/or less backspacing increases the leverage on this already weak point. The main reason I want a D60 in the rear is for the higher GWR. If a full float D44 were available I would likely go with that...
Many aftermarket shafts are made of a material that had better memory characteristics so when the flange bends it returns. This has gotten me by thus far, but as I continue to add weight to my rig I'm not sure for how long. This said, I just recently went to an ARB rear locker with 35 spline shafts and they are WAY more beef than the stock 32.... :fingers crossed:
Davwashere
New member
Because mine has special gear oil in it the increases it strength by 400%
DynoMax Exhaust
Member
Take it easy on your front and beef up that steering too.
This really sucks.
This really sucks.
CanadianJK72
New member
I'm running 37's on stock axles an are doing just fine , I have a truss going on along with steering upgrades , I wouldn't recommend it as a permanent solution I have aleaady blown a ring an pinion an im now in the middle of a 1 ton swap
How is already blown a ring and pinon running on stock axles doing fine? :thinking:
DynoMax Exhaust
Member
Blowing a R&P and doing just fine don't sound mutually exclusive. Ha!!! :brows:
Congrats on the ton swap. That, along with steering assist, really are great for peace of mind.
Congrats on the ton swap. That, along with steering assist, really are great for peace of mind.
CanadianJK72
New member
The ring an pinion wasn't all because of the axle , I was heavy footed in the situation I should've added
CanadianJK72
New member
As I mentioned I wouldn't recommend it permanently being a solution , thanks ! It's coming along nicely can't wait for peace of mind hahah
Yeep
New member
Stock rear axle on 5.13's... The housing is fine, the axle shaft snapped at the splines....too much gas and once the tire got traction after a bounce it snapped way easier then I would have expected
CJW
New member
I have D44s and 37s. I've personally never had a problem (knock on wood), but I also always use as little gas as possible on all obstacles. I have been on runs though where I've seen both; axle shafts snap and blown ring and pinions. It'll work.....for a while. How long depends on terrain and the skinny pedal.