explorer rearend gear ratio change - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 11-29-2011
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explorer rearend gear ratio change

I have an 02 edge 4.0 I plan on dropping a 5.0 (99 exp) I have the complete (rolled ) exp. The exp r/e is an 3.73 L/S. What all would I have to do to change it to 4.10 l/s. Is it anything the same as a 9" where you just change the pod? The exp. r/e is not in the truck yet.
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Old 11-29-2011
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All you need is the ring & pinion from an 8.8 with 4.10s, and to have it installed and set up.

What's in your truck right now? Do you have 4.10s? Is your rear a 7.5 or 8.8?
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Old 11-29-2011
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IF he has 2 wheel drive in the Edge, his gas gauge will like him better staying with the 3.73 , since he'll have a 5.0 engine to push it.
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Old 11-29-2011
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If you know how to setup gears, all you need is the ring and pinion and asscociated tools of the trade. The explorer 8.8 is not a drop out 3rd member like the 9".

If you don,t I suggest you take it to a shop or spend alot of time researching and reading about how to do it. If you have any kind of mechanical inclination, and enough patience, gear setup isn't all that hard (but you have to have all the right tools to do so).

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Old 11-29-2011
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3.73 versus 4.10

. Any body got any guess what kinda rpm I would be running at say 70 mph with the 3.73 versus 4.10? I just drive the truck locally so I'm just looking for fun more than gas mileage, (The 4.0 5-spd in it now only gets 12-14 mpg) Thanks for the info

Last edited by jerrym; 12-04-2011 at 10:57 PM.
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Old 12-02-2011
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Quote:
Originally Posted by jerrym View Post
I have a regular 8.8-3.55 one-leg. Any body got any guess what kinda rpm I would be running at say 70 mph with the 3.73 versus 4.10? I just drive the truck locally so I'm just looking for fun more than gas mileage, (The 4.0 5-spd in it now only gets 12-14 mpg) I'm retired so this is kinda like a fun project! Thanks for the info
In order to give you your RPM estimate, we would need your tire size.
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Old 12-02-2011
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31x10.50 15
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Old 12-02-2011
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With a 31" tire, here are your RPMs for your truck:

w/3.73 in fifth gear: ~2250
w/4.10 in fifth gear: ~2450

edit: IMO, on the 4.0, the 4.10s are the way to go, but with the 5.0, I'd stick with the 3.73s
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Old 12-04-2011
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Id go with 4.10s. My stepdad use to have a 99 explorer 5.0l and it came with 3.73 gears, and little 235/75/15 tires. 4.10 gears and 31" tires would be closer to stock.
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