D30 swap question

[keith haw]

I've got a 242 in my 87 so no disco front axle. Been thinking about swaping in a YJ 4 banger d30. That would give me 4:10's and disco....Any downsides to this? Did any of the XJ's come with a disco and 4:10 gears, 4 banger maybe?

Thanks
Keith

[woody]

Yep Up through the early 90s 4cyl (not sure when the XJ went all non-disco) should have 4.10

The only snag is that the 242 Jeeps have no provision to activate the disco motor when 4x4 is selected, but one could be rigged up easy enough or do a posi-lock.

[keith haw]

Thanks Woody.. Figured I'd do a manual disco setup for a poor (read that cheap) man's ARB.. Good to know that XJ's had them that will save alot of bracket welding.. I've been told all disco axles were low pinion, is that true?

Keith

[woody]

No not true at all...my 89 MJ has a HP 30 (that used to be ) disco, same goes for all the rest of em in 231 or 207 XJs before 92(yearguess?)

I dont think it was until 99 or so to where the XJ LP30s started showing up.

[GSequoia]

Actually I've always heard that the LP's came in 2001 because they wanted to share with the TJ's axle...

[1986xj]

The V6 XJ's with the factory tow package came with 4.10's as well.
Mike B.