how do you tell?
Senior User
Joined: Jan 2002
Posts: 262
Likes: 0
how do you tell?
If you can't find an axle code sticker or diff tag that indicates it is a limited slip you could:
1. Jack one side up and see if you can rotate the tire that is up in the air. If you can't turn it very much then it has a limited slip.
2. Put one rear tire on a surface that has a lot of traction and the other side on one that doesn't and spin the tires. I.E. put one side on pavement and the other on grass or gravel. If both spin you have a limited slip.
3. Pull the third member off that 9 inch and look at the differential itself. If it has clutch packs then its a limited slip. If all you see are spider and side gears in there, then it's an open diff.
-Cope
95 F-150 4x4
4.9L M5OD
Front Truetrac Rear Detroit
3.73 Precision Gears
Warn Premiums
4" Superlift Superunner
1. Jack one side up and see if you can rotate the tire that is up in the air. If you can't turn it very much then it has a limited slip.
2. Put one rear tire on a surface that has a lot of traction and the other side on one that doesn't and spin the tires. I.E. put one side on pavement and the other on grass or gravel. If both spin you have a limited slip.
3. Pull the third member off that 9 inch and look at the differential itself. If it has clutch packs then its a limited slip. If all you see are spider and side gears in there, then it's an open diff.
-Cope
95 F-150 4x4
4.9L M5OD
Front Truetrac Rear Detroit
3.73 Precision Gears
Warn Premiums
4" Superlift Superunner
Senior User
Joined: Mar 2001
Posts: 112
Likes: 0
From: South St. Paul, MN
how do you tell?
I dont know if i would recommend having one tire on pavement and the other in dirt even if it is a limited slip it will still spin only one tire unless the clutches are really strong. Thats how most of the state troopers blow the limited slip out in their cars (flooring it coming out of the ditch with one tire on pavement the other on grass or gravel).
1979 F150 Custom 2wd C4 302 painted ford blue, bored .040 over, flat top pistons with valve reliefs, Edelbrock Performer cam, carb, and intake, stock heads, MSD Ready-To-Run distributor, MSD Blaster 2 coil, Edelbrock valve covers and air cleaner with K&N filter, Dynomax headers, dual exhaust with Flowmaster 40 Series mufflers, 38 gallon fuel tank(how i can drive it further than around the block) 9" rear end with 2.75 gears and open diff.
"Your only as fast as me until the light turns green"
1979 F150 Custom 2wd C4 302 painted ford blue, bored .040 over, flat top pistons with valve reliefs, Edelbrock Performer cam, carb, and intake, stock heads, MSD Ready-To-Run distributor, MSD Blaster 2 coil, Edelbrock valve covers and air cleaner with K&N filter, Dynomax headers, dual exhaust with Flowmaster 40 Series mufflers, 38 gallon fuel tank(how i can drive it further than around the block) 9" rear end with 2.75 gears and open diff.
"Your only as fast as me until the light turns green"
