Question on re-gearing axles

[Westtown Willy]

That's what I was thinking. They look pretty easy to do too....pricey just for the u-joints. That's why I asked about the axles.

But upgrading the locker and inner and outer shafts to 30 spline chromoly is a good price at $400 either way. I think

where are you getting 30 spline chromoly shafts for $400?

 

[GTboosted]

where are you getting 30 spline chromoly shafts for $400?

It's my local shop. I beleive they are USA standard.

Amazon has them for 630 and he is giving me 10 year warranty so a good deal I think.

 

[Jerry Bransford]

It's my local shop. I beleive they are USA standard.

Amazon has them for 630 and he is giving me 10 year warranty so a good deal I think.

What 30 spline hubs? Alloy USA 30 spline hubs don't hold up, which is another reason I recommended above staying with 27 spline shafts. Good quality 27 spline 4340 alloy shafts are way more than up to wheeling hard trails with 35" tires and a locker. I wheeled my previous TJ on extra-difficult trails like Sledgehammer in Johnson Valley with f/r lockers with 4340 27 spline shafts up front with 35" tires without problem.

 

[Serbonze]

For what it’s worth, I drove mine on 33s with the OE 3.73 gears and 32rh for years.

When I finally decided to add lockers, I regeared to 4.10 at the same time.

The difference was immediately noticeable and I should have done it long before then.

 

[GTboosted]

What 30 spline hubs? Alloy USA 30 spline hubs don't hold up, which is another reason I recommended above staying with 27 spline shafts. Good quality 27 spline 4340 alloy shafts are way more than up to wheeling hard trails with 35" tires and a locker. I wheeled my previous TJ on extra-difficult trails like Sledgehammer in Johnson Valley with f/r lockers with 4340 27 spline shafts up front with 35" tires without problem.

I agree since I will stay with 33x10.5s but there really isn't a price difference so I'll just do the 30 spline upgrade . Not sure if I can get 27 spline much cheaper than $400 so I didnt ask.

They are USA standard not alloy USA. Apparently same thing as yukon shafts. The outers are 27 spline so no need for hubs, right?

So technically not a 30 spline all the way. The locker and inner will be 30 and outer will be 27.

 

[GTboosted]

For what it’s worth, I drove mine on 33s with the OE 3.73 gears and 32rh for years.

When I finally decided to add lockers, I regeared to 4.10 at the same time.

The difference was immediately noticeable and I should have done it long before then.

Yeah I am adding lockers so it's a good time to upgrade. If I didnt want the lockers I would do the front rebuild only.

 

[Jerry Bransford]

I agree since I will stay with 33x10.5s but there really isn't a price difference so I'll just do the 30 spline upgrade . Not sure if I can get 27 spline much cheaper than $400 so I didnt ask.

They are USA standard not alloy USA. Apparently same thing as yukon shafts. The outers are 27 spline so no need for hubs, right?

So technically not a 30 spline all the way. The locker and inner will be 30 and outer will be 27.

There's no benefit to having 30 spline inner shafts and 27 spline outers. Like having a 3/8" link at the end of a chain made with 1/2" links. My last axle breakage was a 27 spline outer stub shaft.

 

[GTboosted]

There's no benefit to having 30 spline inner shafts and 27 spline outers. Like having a 3/8" link at the end of a chain made with 1/2" links. My last axle breakage was a 27 spline outer stub shaft.

Thanks and from all your posts I know you know your stuff. I completely agree.

I just looked at the kits and the 27 inner and outer is about $90 less MSRP compared to the 30/27 set. The $400 price I got quoted is not too bad, I feel there wont be much difference at cost between them. So I didnt question it much. Maybe when I take it in I will ask how much cheaper if I get the 27 spline locker and inner shafts.

Thanks for your help!

 

[Westtown Willy]

or you could go full dumb ass:

https://www.revolutiongear.com/product/97_06_tj_lj_xj_and_zj_us_made_front_super_30_axle_kit