bogged wrote:Red Rover did it I think.
Wrong
Red Rover did a TB42 to a TD42 swap
I did the 2.8 to 4.2 swap
Let me list you the problems.
2.8 and 4.2 dont share the same mounts.
drivers side chassis mount is off by 2 inches so a plate will have to be made up on the engine to acommodate the new location for the engine mount to be placed properly.
the electrics on the 2.8 arnt the same as the 4.2 as the 2.8 i think has throttle sensor etc and i havent been able to find one on the 4.2's electrics chart. My GQ now has the 4.2 in it now and is goin to the auto electrics this saturday to get the wiring converted over.
the diff flanges are smaller on the 2.8 meaning if you want to run 4.2 gearbox you'll need to change the flanges over to a 4.2 flanges
the tailshafts are different also, you'll need the 4.2 shafts as well.
Gearbox crossmember bolts up straight up no problems.
clutch system on the 2.8 is on drivers side whereas the 4.2 has it on the passenger side, so you'll have to reroute the hydralic lines and hook it up to the slave cylinder on the passenger side of the gearbox.
I went thru all this coz i didnt want to sell my GQ as i was still paying it off and a lot of my time and labour went into this conversion as i had a 4.2 sittin there so i rebuilt it and put it in. I didnt take into account the extras involved in the conversion.
A/C cant be used. as its a different mount on the 2.8. i had to remove mine and source a 4.2 air conditioner compressor. pretty much all the accesories cannot be used. To complete the swap 100 percent you'll need to get a 4.2 with turbo and all the accessories that come with it.
10K... maybe if you do everything yourself
Also need to get a 4.2 radiator and fan shroud as they are different also.
In your positoin, just sell the 2.8 and buy a 4.2 outright.
Much easier IMO
TOM