Question on Gears and Spline Counts

[WahooSteeler]

Piecing together the parts to re-gear in the not too distant future. Got my eye on a carrier/R&P combo that the seller says is from a YJ D30HP, which should work (the carrier is for 3.73s+, which I need). First question, I'm assuming that unit was 27 spline axles like in my 88? What is the standard pinion spline count? Second question, I have a factory D44 rear which is 30 spline axles, correct? What is the standard pinion spline count? Last question, the seller's description says "Jeep Wrangler YJ ..... 87-95 95b". What is the "95b" designation refer to?? 

[derf]

Pretty much all Dana 30 axles are 27 spline.  There is a "super 30" kit that upgrades it to 30 spline axle shafts but he'd probably call that out in the description if that were the case.

 

As far as the R&P, I would shy away from trying to install used gear sets.  They never go in quite right.  And just about all shops won't install used gears.  The few that do won't warranty anything about their work.  Since every axle housing is just a little bit off, you can't just reuse the existing shims that may come with the gears.  The carrier sounds like what you need but I'd spend the few bucks on getting a brand new set of gears.  Given the overall cost of a gear swap, the extra for good parts that can be warrantied is worth it.

 

The rear Dana 44 has 30 spline shafts from the factory.  The AMC20 would have 29 spline shafts, and the Dana 35 would have 27 spline shafts.  The Dana 44 and 35 both have upgrades available to bigger shafts, but only in the aftermarket.

 

I don't know what 95b means.  May be a typo.

[DesertRat1991]

3 hours ago, WahooSteeler said:

Piecing together the parts to re-gear in the not too distant future. Got my eye on a carrier/R&P combo that the seller says is from a YJ D30HP, which should work (the carrier is for 3.73s+, which I need). First question, I'm assuming that unit was 27 spline axles like in my 88? What is the standard pinion spline count? Second question, I have a factory D44 rear which is 30 spline axles, correct? What is the standard pinion spline count? Last question, the seller's description says "Jeep Wrangler YJ ..... 87-95 95b". What is the "95b" designation refer to?? 

 

The Dana 30 and Dana 44 both use a 26 spline end yoke.

[WahooSteeler]

Derf, thanks for the info. Was also trying to confirm the spline count on the pinion gear for both the D30 & D44 if you happen to know that info. I believe the D44 pinion is 26 spline, not sure on the D30 pinion. 

 

New gears would be nice, but the budget and amount of usage my truck gets does not warrant that amount of investment, it's not a DD. The regear is more of a want than a need. I have 3.54s on 31" tires and it does fine. I did plan on getting new shims, bearings and seals.

 

I messaged the seller about the "95b" and he said that is just an internal designation for what it came out of, in this case a 95 YJ. 

[WahooSteeler]

10 minutes ago, DesertRat1991 said:

 

The Dana 30 and Dana 44 both use a 26 spline end yoke.

 

Thanks for the confirmation

[derf]

The 30 and 44 both use the same yoke.  I just rebuilt a 30/44 combo to swap into my XJ.  Bought two identical yokes with ubolts, one for each axle.

[kryptronic]

1 hour ago, WahooSteeler said:

I messaged the seller about the "95b" and he said that is just an internal designation for what it came out of, in this case a 95 YJ. 

 

In 95 the YJ got larger u-joints on the front axle shafts.  95B designates an updated D30.  That's the only change made to the D30 in the YJ run from 87-95.  All YJ D30s were vaccuum disconnect style.

[WahooSteeler]

2 hours ago, kryptronic said:

 

In 95 the YJ got larger u-joints on the front axle shafts.  95B designates an updated D30.  That's the only change made to the D30 in the YJ run from 87-95.  All YJ D30s were vaccuum disconnect style.

 

That's good info!