2.5 to 4.0 questions....


Crash

10+ Year Member

Joined
Feb 3, 2008
Messages
9
Points
3,001
Vehicle Year
1998
Transmission
Manual
Hi all,

I've been going through the posts here for engine swaps - there's a bit of 2.3 > 4.o, but very little on the 2.5 to 4.0.

I have a 98 2.5 that has spun a bearing and one of the valves is starting to go. The 5 speed transmission is in dire need of a release bearing, but otherwise works great. I have a 1994 4.0 donor explorer that is just about finished - transmission is shot, 4wd system is gone, body is ratched, etc etc.

I was looking to swap out the motors -

Has anyone done one of these before?
Can the 2.5 5 speed bolt directly to the 4.0 or do I need a bell housing adapter? If an adapter is needed I would probably just take the transmission out of the explorer and rebuild it - if thats the case, what do I need to muck about with in terms of driveshafts, etc [4wd > 2wd].

Any fabbing needed for motor mounts?

Wiring?

Additionally, what else should I try and Cannibalize from the Explorer? I was thinking rear springs, front coils, and 16" tires for sure - should I be looking at the rear axle?

All of this may have been answered elsewhere - if so I apologize for my ignorance...I appreciate any insight you guys might have.

Cheers,
Crash
 
Since you have the donor truck, take the rear and front axles. Engine and all wires. You cant use your old transmission. I would rebuild the explorer or find another that will go behind the 4.0.
 

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