Ford Racing Gears - Ranger-Forums - The Ultimate Ford Ranger Resource


Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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Old 04-04-2011
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Ford Racing Gears

I currently have 4.56 gears in my truck right now and im wanting to swap them with 3.73 or 3.90 gears. Does anybody know of any sites where i can get frpp gears for a 7.5" rearend?
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Old 04-04-2011
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http://www.ringpinion.com/ProductDet...spx?ProdID=962

Have you given any thought to swapping a 8.8 in?
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Old 04-04-2011
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Why R U going there ?
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Old 04-04-2011
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Never heard of 3.90s

3.55s, 3.73s, 4.10s are you downgrade options.

Instead of regearing I would just do an axle swap to an 8.8
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Old 04-04-2011
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it all cost money. im only 17 and work at a gas station. If anyone has an 8.8 with a 3.73 let me know.
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Old 04-04-2011
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and im doing it so i can actually cruise in it.
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Old 04-04-2011
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What motor, engine combo ?

Sometimes, lower numerical gears will screw up other things, gas milage, drivability…

Also, you will lose some of the zip from the get-go, the 4.56 will feel like a well prepped 4.0 while the 3.73s will feel like a warmed over 2.3L.

Just things to think about.
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Old 04-04-2011
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id hit up some junk yards in your area. You can usually get an 8.8 with 3.73s for a decent price..
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Old 04-04-2011
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I got a 7.5" rear end with 3.73's sitting in my barn at home if your interested.

BTW, I'm at Purdue.
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Old 04-04-2011
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lol sorry, the truck has a 331 stroker with a TKO 600 5 speed. I would like to do an 8.8 swap with 3.73 or 3.90 gears already in it.
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Old 04-04-2011
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Quote:
Originally Posted by ole' stroker View Post
lol sorry, the truck has a 331 stroker with a TKO 600 5 speed. I would like to do an 8.8 swap with 3.73 or 3.90 gears already in it.
331 Stroker, NICE !
Ok on the 3.73, makes sense now.
Explorer Rears have posi, 31 spline axles and usually 3.73 gears but you can check that and as a bonus if you get a newer model I think 2001 or newer you get Disc Brakes; sounds like a winner.
You will need to move the spring perches to the top of the axle (Ranger on Top, Explorer on the bottom) or get a kit that just adds the new spring perches for Ranger mounting. Go figure, Ford made a lot of parts to swap over but made sssooo many that needed that little tweaking.

AND for the guy that mentioned 3.90 gears, that was the main gear set for Street Cars and performance back a few years.

good Luck, there are many, many Explorers/Mountaineers in the JY and in NH they are running around a buck, complete...
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Old 04-04-2011
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yea... i cant afford putting gas in this thing with the gears and its no fun crusing in it lol.
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Old 04-04-2011
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Quote:
Originally Posted by robert99ranger View Post
I got a 7.5" rear end with 3.73's sitting in my barn at home if your interested.

BTW, I'm at Purdue.
What differential is in it? is it 5 lug? how much are you wanting for it?
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Old 04-04-2011
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If you are running a V8 you NEED TO UPGRADE to an 8.8. The 7.5 inch is not reliable under that type of power. 96-01 Ford Explorers come with the 31-spline 8.8 with disc brakes. Pre-96 Expos has 10 inch drums. 4x4 models also have the Ford Trac-Lok Limited Slip. They usually come in 3.55 gears but 3.73s and rarely 4.10s can be found. With the Expo, as mentioned above, you will have to get the spring perches relocated to the top of the axle. If you can't weld or don't have someone who can weld you can go with the weaker 93+ Ranger 8.8 28-spline which will have 10 inch drums. It won't require welding since the perches are already on top and you only loss a little strength in the shafts. They are easier to find with 3.73s and 4.10s. They also coem with Trac-Loks on some of the 4x4s.
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Old 04-05-2011
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see it already have a nice differential in it but i just need to change the rind and pinion.
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