Motor swap 4.2 to 4.0 conversion

[Sully]

Here's the deal, I am sick and tired of my 258. It's slow, gutless, and old. I am thinking about a motor swap rather than a rebuild. I was thinking about a stroker but I am going to pass for now. I want to possibly swap my 4.2 carter carbed POS for a fuel injected 4.0 out of a newer TJ or cherokee. My transmission was just rebuilt so I want to run that with the new 4.0, the transmission is a T-5. My questions are; will the 4.0 bolt up to my T-5 and what other parts will I need to make this conversion work? Any input would be much appreciated.. Thanks


Kyle

 

[yjdave]

NO..........Need to get a different transmission. Get the transmission-T/C-all the wiring harness from a YJ w/ ecu.. The XJ is too hard to make work. We're almost done with another one in a 88. I did mine about 8yrs ago but had a buddy to the wiring. (Get the best one you can afford with everything)

 

[Sully]

Wait so I wont be able to use my dana 300 tcase? CJ's a passenger side diff drop and YJ's/TJ's are driver side. If I get a YJ tcase I will have to get a new front axle with driver drop. Will my dana 300 bolt up to the ax5 or ax15 whatever the 5spd in the YJ is?

 

[redrooster]

Why won't the 4.0 bolt up to the T5 bellhousing?

 

[Bounty__Hunter]

It should. Run the T5 and D300, everything else should bolt in as well.

 

[yjdave]

My bad, thought the t-5 was ax-5 in the 4 banger. The t-5 was bolted to a 6 right? So the 4.0 has the same pattern.

 

[Snitty]

Yeah both blocks had the same bolt pattern for a bellhousing