Jeeppilot
NAXJA Forum User
- Location
- Great Lakes Region
Hey guys, Just looking for some opinions... I've been searching and reading a lot and can't make up my mind on this one... here's my situation...
I'm doing a rebuild on my 99 XJ - it's at around 7.5'' and currently on 35's with 4.56's. stock axles - 8.25 rear, d30 front with upgraded axle shafts and a truetrac.
My rear drive shaft angle needs reduced so I want to put a high pinion in the back, probably a curry 9'' but still undecided. 8.25 has been fine other than that damn low pinion...
So, I want to go up to 37's, I'm gonna go with BFG AT's... I think I could get away with my current 4.56's for a while but would prefer to go lower... If I'm going lower I think 5.13 is the right setup, however that puts me in the position of swapping out the front axle also and I just don't think I can swing the cost right now.
I could go with 4.88's since they are now available for the D30... I'm just not sure they are gonna be enough, I guess it would be about the same as my 35's with 4.56's. also a factor is that I'm going from a mud tire on 15'' steel wheels to an AT on a 17'' aluminum wheels. and I have to wonder, how long is that 30 gonna live with 37's? It's upgraded, but still... perhaps a truss would help it survive for a couple years until I can put a more stout front in... I think I could get away with it for a while if I'm easy on the skinny pedal. I don't think that my new AT/Alum tire wheel combo will induce much more stress than the previous mud/steel combo did, despite the size increase.
I'm trying to rebuild my XJ on a more expedition/roadworthy theme, so I don't wanna go too low on gears anyway... The trails I run don't tend to have a lot of difficult rock sections, mostly woods trails with mud holes, hill climbs, water crossings and snow wheeling.
I'm all ears for opinions and advice - Thanks in advance guys
I'm doing a rebuild on my 99 XJ - it's at around 7.5'' and currently on 35's with 4.56's. stock axles - 8.25 rear, d30 front with upgraded axle shafts and a truetrac.
My rear drive shaft angle needs reduced so I want to put a high pinion in the back, probably a curry 9'' but still undecided. 8.25 has been fine other than that damn low pinion...
So, I want to go up to 37's, I'm gonna go with BFG AT's... I think I could get away with my current 4.56's for a while but would prefer to go lower... If I'm going lower I think 5.13 is the right setup, however that puts me in the position of swapping out the front axle also and I just don't think I can swing the cost right now.
I could go with 4.88's since they are now available for the D30... I'm just not sure they are gonna be enough, I guess it would be about the same as my 35's with 4.56's. also a factor is that I'm going from a mud tire on 15'' steel wheels to an AT on a 17'' aluminum wheels. and I have to wonder, how long is that 30 gonna live with 37's? It's upgraded, but still... perhaps a truss would help it survive for a couple years until I can put a more stout front in... I think I could get away with it for a while if I'm easy on the skinny pedal. I don't think that my new AT/Alum tire wheel combo will induce much more stress than the previous mud/steel combo did, despite the size increase.
I'm trying to rebuild my XJ on a more expedition/roadworthy theme, so I don't wanna go too low on gears anyway... The trails I run don't tend to have a lot of difficult rock sections, mostly woods trails with mud holes, hill climbs, water crossings and snow wheeling.
I'm all ears for opinions and advice - Thanks in advance guys