Running 37s on a stock dana 30 axle
- Thread starter Donny
- Start date
Gibbo
New member
Your not wrong about the difference between the dana 30 and dana 44 ring and pinion. While I'm following everyone's advise on the forum and building my dana 30 for 35's -gussets, axles, and ball joints- the tire shop offered me 37x12.5x17 for only $15.00 more (per tire) than the 35x12.5x17" tires I planned on running, so here I am considering it again. That is until I received my gears (4.88) today. The difference between the 2 rings is huge. While I don't wheel as hard as you rock stars over there, I do like doing some wheel'in, and after seeing that d30 ring I think I'll be quite happy with 35's, especially with an air locker in there as well.:thumb:
Gibbo
New member
Here's a couple of photos for people like myself who haven't seen the difference between the dana 30 and dana 44 gearing. It just blows me away,I had no idea there was that much difference. I roughly measured the rings with a tape measure, and D30 7 1/8" DIA x 1 3/8" thick, D44 8 3/4" DIA x 1 5/8" thick. Big diff. in pinions as well.
aaronstephen
New member
Running 37s on a Stock Dana 30 axle
Anyway I can run. 37" MTR's on a Dana 30? Is this possible?
Anyway I can run. 37" MTR's on a Dana 30? Is this possible?
Re: 37's on a d30?
YES!!! do a search there are a number of threads regarding this!
andrew -
edit: not being a d*ck.... just know there is a boat load of info and opinions out there on this!
YES!!! do a search there are a number of threads regarding this!
andrew -
edit: not being a d*ck.... just know there is a boat load of info and opinions out there on this!
You can. I would not suggest it. Even if you beef up things the torque from the 37's is really hard on your Dana 30.
Paycheck. Nothing against you personally. However I left jk forums and others due to answers like this. A simple yes, and use google. Works.
I hope this forum does not turn into the others. It completely ruins the vibe.
Paycheck. Nothing against you personally. However I left jk forums and others due to answers like this. A simple yes, and use google. Works.
I hope this forum does not turn into the others. It completely ruins the vibe.
Re: 37's on a d30?
dude read my post. i was not sarcastic nor was i a d*ck. just stating there was a bunch of info on this already..... but since i was called out, i run 37" km2s on a 30 with EVO C-gussets/EVO .44 mags & 5.13s. i wheel easy and take easy lines. you just need to be easy and dont lock it. depending on your motor, 4.88s may be a safer choice.
is that better?
andrew -
You can. I would not suggest it. Even if you beef up things the torque from the 37's is really hard on your Dana 30.
Paycheck. Nothing against you personally. However I left jk forums and others due to answers like this. A simple yes, and use google. Works.
I hope this forum does not turn into the others. It completely ruins the vibe.
dude read my post. i was not sarcastic nor was i a d*ck. just stating there was a bunch of info on this already..... but since i was called out, i run 37" km2s on a 30 with EVO C-gussets/EVO .44 mags & 5.13s. i wheel easy and take easy lines. you just need to be easy and dont lock it. depending on your motor, 4.88s may be a safer choice.
is that better?
andrew -
Last edited:
aaronstephen
New member
How long have you been running this setup?
Is probably just run 4.88's since I have the 3.6l
Re: 37's on a d30?
with the 3.6l the 4.88 will be perfect. i have about 20k on my setup.
andrew -
with the 3.6l the 4.88 will be perfect. i have about 20k on my setup.
andrew -
Re: 37's on a d30?
i do also know it will break! they all do.
andrew -
i do also know it will break! they all do.
andrew -
You can run whatever you want but, I wouldn't recommend it. Your axle housing will do just fine even without sleeves just like the 44 but, it's your axle shafts and gears that'll be your weak points. In a Dana 30, a 5.13 gear (what you would want to run) has a really really small pinion and even if you could get your shafts to last, a break there is likely if you wheel your Jeep hard enough. Of course, everyone has their own idea of what wheeling hard or often is and all I can say is that you're talking to a guy who's broken Dana 44's and even a 60.
aaronstephen
New member
Do you think it would help if I ran the KM2's since they're only 2 pounds heavier than the. 35's?
It wouldnt hurt that is for sure. I am worried about "upgrading" to Nitto Trail Grappers as they are a bit heavier and that may be pushing my luck. I like my setup though. I do want a 44 (either rubi or PR) if for no other reason then to have a bigger R&P (5.13s), because if I am not mistaken, that is the only difference between a 30 and a rubi 44 (please someone correct me if I am wrong). A true "upgrade" though would be a PR44 - but as is anything - that take this $$$$$$$$$$$$$$!!!
Philip *AZ*
Banned
37's on a d30?
Youre not wrong. Eddie, Chris and a couple others have already stated this fact, multiple times.
Lock Down or Get Locked Up
Youre not wrong. Eddie, Chris and a couple others have already stated this fact, multiple times.
Lock Down or Get Locked Up
37's on a d30?
It's not the weight you should be concerned with but the size. Your tires are like big gears - the bigger they are, the more it takes to rotate them.
It's not the weight you should be concerned with but the size. Your tires are like big gears - the bigger they are, the more it takes to rotate them.
37's on a d30?
They are only about 8 lbs heavier a piece - far from enough to matter.
Regarding Rubi 44's, the only difference in them are the diff and shafts. The tubes, end forgings, knuckles and brakes are all the same.
They are only about 8 lbs heavier a piece - far from enough to matter.
Regarding Rubi 44's, the only difference in them are the diff and shafts. The tubes, end forgings, knuckles and brakes are all the same.
Sorry that I came across strongly. I did read your whole post.
I really just don't want people cutting on people for asking questions that have been asked. I'd rather teach them how to search then tell them to search.
Re: 37's on a d30?
good times!
andrew -
good times!
andrew -
xflstl
New member
37's on a dana 30. There are people out there doing it, however it isn't a good idea IMO. 37's are kind of the line most people with D44's are thinking they better goto D60's asap. If you are a complete street Jeep guy then go for it, If you wheel it so mildly that you look for a bypass to the bypass then go for it. If you wheel hard enough to make anyone you know nervous at all then you better get a D44 or D60 before going to 37's.