Dana 30 Low pinion ratios

[chris_amrein]

Sorry if this has been covered but I need to know if a 5.38 R&P is available for XJ low pinion Dana 30's. I know HP Dana 30's stop at 4.88, and I know CJ Dana 30's went to 5.38, but I don't know if CJ LP 30's are different than XJ LP 30's. In other words, can I use the old CJ 5.38 gears in a XJ Dana 30? Hopefully that makes some sense.

FWIW, the back story here is I have built a HP Dana 30 for my Jeepspeed project and have yet to gear it however I know I am limited to 4.88's. I really want to run something in the 5.38 neighborhood so my HP 30 is kind of a problem. I would be willing to sacrifice some strength in the form of a LP axle if I could get the 5.38's since for me a front axle is really just going to get used if I get stuck.

Thanks in advance,

Chris

 

[Cache96]

You should be able to run the 5.38's from a cj LP 30 with no problems. You might need a different carrier since i think it breaks a from 3.73 to 4.56.

Edit: well they might be different afterall..check below.

TJ,WJ and ZJ

http://www.justdifferentials.com/index.php?main_page=index&cPath=22_35_116_367


CJ Dana 30

http://www.justdifferentials.com/index.php?main_page=index&cPath=22_32_93_370

 

[National Drivetrain]

Chris,
The low pinion D30 in the XJ uses a short pinion TJ gear which is totally different from the old CJ LP D30.

I've got a Rubicon housing with an ARB I'll sell you. It's got a Fabtech cover on it and its trussed and everything...:laugh3:
(inside joke)

 

[chris_amrein]

Ha!!! That axle sounds great!!! Why would you ever want to get rid of that thing???

So 4.88's are the limit even with the LP? I think I'm going to be bummed out if I try to run 4.88's...

 

[FatCity]

You could re-tube a Toyota 8" like Shaffer does and run 529's. Housing should be easy enough to find and it's 30 spline. You can use Rubicon shaft length's.
Your gonna hate 488's for sure.

 

[chris_amrein]

I talked to Shaffer and thought about going the Toyota route or even turning around a Samurai rear axle and adding XJ outers but the reality is both those options are a lot of work.

Guess I'll sleep on it for now. Thanks for the info.