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rear differential F 150

A

Anonymous-0

Well-known Member
The rear differential in my 2000 F-150 is torn up. It is 10 3/4" with 3.73 My question is "When I'm looking for a replacement from a wrecker or used parts dealer, how specific to my truck does it have to be?" This is going to cost a few bucks.
 
(quoted from post at 22:00:20 06/11/09) The rear differential in my 2000 F-150 is torn up. It is 10 3/4" with 3.73 My question is "When I'm looking for a replacement from a wrecker or used parts dealer, how specific to my truck does it have to be?" This is going to cost a few bucks.
Click to expand...

Exact gear ratio match or speedometer and trans shift points will be off.
Possible 3/4 ton but will require new rims and possibly tires.

Joe
 
I think a F150 differential is a 8.8 or 9 inch.10 3/4 might be a F250 but I didnt look it up.You can probably go to a salvage yard and get the same 3.73 8.8 or 9 inch that you have for not a whole lot of money.
 
Should be an 8.8" that's what is in my '98 F150. Speedometer gears can be adjusted. The Ford garage parts room has a book of them. And it shows what driver and driven for any axle and tire size.

A few bucks for a driven gear and ten minutes to change it on the sensor, or since late 1998, the computer can be reset by the Ford garage and you don't need a sensor gear change.

Gerald J.
 
Go to www.car-part.com, there are a bunch of choices. You can search salvage yards by your zip code. Maybe you have a 10 1/4 rear axle 7700GVW? You will need the tag number off the rear axle. Its usually a paper tag wrapped around one of the tubes. If you call a salvage yard they will more than likely need that tag number.
Reman 10.25 with locker retails for about $1250. Non locker is $950.
I would suggest getting a reman or have yours rebuilt. This is a common problem and who knows if the used assy will have the same troubles. Just my opinion.
 
Don't screw around with a salvage yard rear end. Just rebuild it. And if it's not posi, this is a great time to make the switch.

Here's where I get all my rear end parts. They're local for me, so I don't know how their online service is, but they're great to deal with in person.
Drive Train Specialists
 
(quoted from post at 17:00:26 06/11/09) I do have 7700 GVW, will look for tag no. tomorrow. That's kind of what I wanted to know.
Click to expand...

Then it should be a 10.25. It should be on the tag on the diff for sure.

Basic rule of thumb is you need the one with seven lugs for the tires, there ain't too many of them floating around to pick from so that will help limit the options. When you call, be sure to mention it is a 7700, that makes a big difference, otherwise you will end up with a 9.75 out of a regular 5.4 truck.

4.2/4.6 trucks got the 8.8
5.4 trucks got the 9.75
7700 trucks got the 10.25
 
You have a 9 3/4 rear axle. the 10 1/4 & 10 1/2 axles went in the F250 & F350.

I would also just rebuild the rearend rather than searching for one. A couple days haveing it rebuilt is far better than searching for a week or so.
 
Just to clarify, the truck is a 2000 F 150, 4x4, 7700 GVW with 5.4 l engine. The tag on the rear end appears to say 11F. The truck does have 180,000 km which DID have me leaning toward alvage yard rear end. But now that I realize the selection is pretty limited I'm starting to see the wisdom in just getting it rebuilt.
 
(quoted from post at 18:58:10 06/11/09) You have a 9 3/4 rear axle. the 10 1/4 & 10 1/2 axles went in the F250 & F350.
Click to expand...

It actually started out as a F-250LD in the late 90's, pretty much a beefed up F-150 with a heavier frame, rear axle and 7 lug wheels. Sometime around 2000 they changed it to the F-150 7700 since it had the F-150 body and had nothing in common with the F-250 Super Duty.

Watch for them, when you find one with 7 lug wheels you will notice it isn't a 9.75 in the back.
 
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