91xj

i got a 99 high pinion d30 with 3.07s in it right now. im wondering if i can get gears from the jy out of a 4 banger with 4.10s. will the older styles work with the new high pinion axle? is there any difference between the two that would make the gears not work?

taylorworld

are you talking about taking out the ring and pinion gears from the jy and putting them in your axles? it would probably be best just to get the whole axle from the jy and swapping them out. but yes the older gears will fit in your case as long as it high pinion to high pinion axle.

That Jeep Guy XJMJ

no you should be fine... i'm doing the same swap in a week or two or whenever i get time... i picked up a D30 front axle out of a 90 wranlger with 4.10's ($100) and an 8.25 out of a 93 XJ with 4.10's ($75)....

putting them in my 98 XJ axles.. the front is a direct carrier swap.. no real adjustments needed.... all the D30 cases were made from the factory almost dead nut exact same.. nuttin really changed through the years... my 8.25 axle is a different story.. diff spline counts and case differences so they actually need to be re-installed profesionally

91xj

what? its a direct carrier swap? man, thats what i was planning on doing, but the guys on here told me it wont work to just swap the carriers. are you sure that is correct? Im not saying your wrong, i was just hoping its that easy.

SeriousOffroad

No, you'll need a 3.73 and up carrier.

91xj

what do you mean by 3.73 and up?

1990cherokee

http://rustysoffroad.com/mm5/merchan...egory_Code=RIN

Thats what he means, need a low ratio one. its what i have to buy in order to do 4:56's

91xj

so, wouldnt a low ratio carrier already be in a d30 with 4.10s that the 4 cylinders have?

1990cherokee

They should, i have never looked at a stock 4 banger axle, but if it is 4.10's then yes cause a stock carrier cant go past 3.90

offroadnut36

sorry for hi-jacking but, how do you tell the difference between low and high ratio carriers?

That Jeep Guy XJMJ

from what i've been told as long as you get the full carrier out of the axle.. then you can just install the 4.10 carrier right into your front axle (thats the thing that the ring and pinion bolt to)

now if your only buying the ring and pinion set without a carrier then yes you will need to buy a new carrier to put them in cuz they won't match into your 3.07 carrier
does that clear it up some?

91xj

yep. after i did the axle swap i didnt had four wheel drive for about three months. i put my old carrier and pinion in today to match the rear 3.55s for now. it works great. the gears mesh perfectly and everything seems in order. thanks for the help jeep guy.

ZachsXJ

Can anyone confirm for sure that you can just do a carrier swap and have a proper wear pattern on a front D30?

91xj

well i used a cattle paint marker. one of those paint stick things and i marked the ring gear, spun it around a few times, and checked it out. the wear pattern was exact to the marks the gears had when it was in the other axle. the paint was exactly where the wear marks were.

91xj

i confirm it. at least with these gears and my axle. i was surprised.