I have a 94 yj 4.0 stock motor. I want to change out the 27 spline with some 30 spline chromos off a TJ with a locker. One of my person jeep friends says I'll have too truss and sleeve my axle? Any help guys? TIA
JEEP: its not what you buy, its what you build.
In that case go for it. Keep in mind 'if' you do break anything, it may be more expensive to replace since the 30 spline set up is custom. Also, as far as sleeving the 30. The only one I recall doing it on this board is Joe Dillard. But that was b/c he cracked a tube, which IMHO is rare. Of course, with 38's, a truss would'nt hurt. Good luck.
'92 YJ, 4.0, 5sp, 8.8, 4-1, SYE, BDS 5" on 35 MTR's. 1ton TRE flip, 1"BL, 1" MM. <><
'05 LJR, 5.13's w/37 MTR's.
Originally Posted by 80 CHOPPER
Knowledge is a tool, without knowledge, you are just a tool.
Sleeving it would be the best thing...
NOT what I did, of course. Would make too much sense for me to do it the right way.
I took some left over steel(3/8 inch thick) and made this little ..."thing" that I welded over the tubes.
Does it help??? I have no clue except to say haven't bent them...yet.
Can see the little pieces I welded on the tubes here:
(That piece from the pumpkin to the disco on this side, shorter on the drivers side, but still a welded piece there.)
Here is another pic of a different project that shows a bit of how I welded and cut it to fit:
Ive twisted the splines on the stock shafts and the long side chromo which is also 27 spline. Also snapped a stub shaft. But So far I have not snapped the larger u joint.My breakage of the 27 spline stuff is very rare actually. Even though i would never drop the cash on a set of 30 spline shafts and locker for the Dana 30 I think that would make the setup pretty darn reliable with my 35s.
Still, 38s are too much for a Dana 30 in any configuration. Just my 2 pennies.
Your limited slip differential sucks.