Transmission Swap

[Bulletslinger]

Is it possible to swap out the transmission for a more fuel efficient one???

 

[TechGuru]

You'd be better off just changing your differential's ratio. What is it now? 3.73 or 3.55?

You might be able to drop it down to 3.27 or 3.08.

Axle Codes: http://www.explorerforum.com/ntrprize/Axle.htm

 

[Bulletslinger]

First time I've owned a ford, so I don't know the diff specifics

I do know that it's a stock 2002 Eddie Bauer 4.0. So if there is a usual diff ratio for that, it's probably that

 

[TechGuru]

First time I've owned a ford, so I don't know the diff specifics

I do know that it's a stock 2002 Eddie Bauer 4.0. So if there is a usual diff ratio for that, it's probably that

Look for the Axle code on your door sticker.

 

[blue_goose]

You'd be better off just changing your differential's ratio. What is it now? 3.73 or 3.55?

You might be able to drop it down to 3.27 or 3.08.

Axle Codes: http://www.explorerforum.com/ntrprize/Axle.htm

If you put something higher than a 3.55 you will do better on the flat, windless highway but the 4.0 doesn't have enough power and bogs down and downshifts a lot in any hills, can't handle a headwind and acceleration is terrible. I have a 3.55 with oversize tires which gives it a higher final drive ratio and its a slug, especially with a load or towing. The mileage ends up being worse because the engine is working harder.

 

[TechGuru]

I'm actually thinking about going from a 3.73 to a 4.10 when I rebuild my differential, only thing is if I change ratios I'll have to do the front too. I'm trying to prepare this thing to eventually tow a travel trailer.

 

[MyExplorer03v8Lim]

I'm actually thinking about going from a 3.73 to a 4.10 when I rebuild my differential, only thing is if I change ratios I'll have to do the front too. I'm trying to prepare this thing to eventually tow a travel trailer.

Can I ask a dumb question? What is the reason for changing your gear ratios? I know very little about any of this stuff. Is the 4.10 better suited to towing? Does that come at a cost? I'm considering investing in a trailer. Did you ever end up rebuilding your differentials? How'd it go?

 

[extra-medium]

http://science.howstuffworks.com/transport/engines-equipment/gear-ratio.htm