4.0 to 4.0HO

[Waytec]

Hello everyone First post here I will do a proper intro shortly.

I am hoping that I did not put the cart before the horse.

I picked up a 4.0 HO out of a 94 XJ today to transplant into a 90 MJ. Can anyone point me to a thread or topic of someone that has already done a swap. I am hoping have the solutions to all the issues before I start pulling bolts out.

Thank You

Aaron

[jpdocdave]

howdy, so you're saying you want to make your renix 4.0 an ho 4.0, engine management and all correct? you got some work ahead of you, but there's plenty here that have done it.

[Waytec]

Ya I have the hole engine, wiring harness and computer with it as well. At the same time I will be changing it over to a open coolant system.

[Wildman]

Welcome Waytec :wavey:

 

If you have not found your way over to the DIY project write ups, you'll find alot of info over there, like -

 

viewtopic.php?f=9&t=7659

[Waytec]

Thank You will start searching over there. I am a long ways into he tech section but not finding anything I need.

[Red 1989 MJ]

Welcome to CC. :cheers:

[JeepcoMJ]

to do a true H.O. swap, you need

 

engine, flywheel/flexplate, the corresponding torque converter for the flex plate, ALL engine sensors, ALL electrical components, ALL wiring from the dash all the way forward, and the trans. harness and trans speed sensor.

[dunl]

to do a true H.O. swap, you need

 

engine, flywheel/flexplate, the corresponding torque converter for the flex plate, ALL engine sensors, ALL electrical components, ALL wiring from the dash all the way forward, and the trans. harness and trans speed sensor.

 

He's also swapping from an auto into a manual.

 

Good to see you here Waytec. :cheers:

[JeepcoMJ]

to do a true H.O. swap, you need

 

engine, flywheel/flexplate, the corresponding torque converter for the flex plate, ALL engine sensors, ALL electrical components, ALL wiring from the dash all the way forward, and the trans. harness and trans speed sensor.

 

He's also swapping from an auto into a manual.

 

Good to see you here Waytec. :cheers:

 

yeah, I was just pointing out the differences in torque converters, too. the converters are basically the same, but they bolt to the flexplate in different locations.

 

 

if you're going 5 speed, and converting to H.O., make sure you have a 5 speed engine harness and similar year dash harnes (any trans option), with a 5 speed ECU.