Im taking the jeep for a regear to 4.88's this comming week. Im going full Detroit in the rear with a lock-right upfront on 35" MT/R's. What I can't decide on is if I want to bother upgrading the rear to 33 splines at the same time or not.
I realize the 33 splines are stronger, but if I stay with the 30 spline, I can use the stock shafts as spares. If I go with 33 splines, I would have to buy another set and get the bearing/backing plate pressed on etc.
Thinking down the road, I can also see finding 30 spline shafts in a pinch would be much easier on trips. I drive to/from wheeling and driving home on just the front is not something I care to repeat often.
I would go with a set of new shafts from Alloy USA. Get the 30 spline and they will be alot stronger than stock. The 30-spline Alloys are pretty tough. I don't really see the need to go to 33 spline. I've had my 30spline alloy's for over a year now on with 35" MTR's with no problems.
Last edited by SteelBlueTJ; 09-17-2007 at 04:39 AM..
I would go with a set of new shafts from Alloy USA. Get the 30 spline and they will be alot stronger than stock, but still 30 spline- meaning you can use your any oem ones as spares still. The 30-spline Alloys are pretty tough. I've had them for over a year now on 35" MTR's with no problems.
Exactly what I was thinking. Still open to input though.
I've got the 35 spline alloy usa shafts (is that the mas grande?)...not much use on them yet, but the way I look at it, if you guys aren't breaking them with the alloy 30 spline, then the 35 spline is extra security.
If you go with an aftermarket hardened chromolly 30 spline like from Alloy USA or Superior axle, you can stick with 30 splines. I already twisted the splines off my stock 30 spline OE axle (Detroit Locker and 35" tires) but I haven't had any problem since upgrading to Alloy USA's beefed up 30 spline alloy axles.