justin H said:
thank's for the info, i think i have an 8.25 in the rear already it's the front i'm worried about.
anyhow lastnight by the grace of the wheeling god's or luck of the irish either one, I came up on a pair of 60's f/r.
so if all go's right i will be useing those wich came out of a newer ford f-350.
thank's much guy's
ok. to the best of my knowledge, the MJ didnt come with a 29 spline 8.25. (kinda hard when the MJ stopped in 92 and the 29 spline started 96+). i think even the 27 spline is a streach.
does your rig have ABS? if so you do NOT have a 8.25 plain and simple. ABS was offered with the Dana 35 only.
if you in fact do have an 8.25 stock , then it will be of the 27 spline variety which is only marginaly better than a D35 some would say.
here is a chart that shows the shapes of some popular diffs. pay attention to the subtle differences in the 8.25 and the 35. peticularly the 8.25 will have a flat lip on the bottom extending down below the edge of the cover. the 35 is oval on the bottom and has no flat lip. the edge will terminate shortly after the cover.
i think right now a axle swap and especialy full widths may be a little out of your league for the time being. shoot, i know it is for me.
if you do deside to go fullwidth, i would suggest not going at it alone. many here have done the mod and can/have given pointers and write ups. a simple search will aid you in learning a ton about the topics of axles, gears, steering, and full width. its enough to give one info overload. also since the spring mounts are the wrong width on the 60's for the xj, one should be very confident in their welding abilities to attempt a full width mod.
hth
stewie