What rear end?
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 207
Likes: 1
What rear end?
I bought a 1988 F-150 4x4. It originally had a limited slip rear end but the guy I bought it from said the rear end had been changed. Both rear wheels spin full-time. Does anybody know what rear end this could be?
Last edited by kellar; Mar 18, 2004 at 06:42 PM.
Postmaster
Joined: Jul 2003
Posts: 2,711
Likes: 2
From: Pittsburgh
full time as in they chatter going around corners or full time as in if you jack it up and spin the tires they both go the same way? If it's the previous it either has a spool or a locker. if the latter, by they don't chatter, then you have an LS. If it has a locker it'll unlock if you get off of the gas and stop chattering in a turn. If it's a spool they'll catter around a turn no matter what.
Justin
Justin
Postmaster
Joined: Jul 2003
Posts: 2,711
Likes: 2
From: Pittsburgh
If it's jacked up and the wheels spin in opposite directions then you have just a regular open differential.
If you need to ask about chattering around corners, then it doesn't do it.
When going around a corner at low speeds does the truck buck and rattle and sound like it's dragging a tire? (it won't since you have an open diff)
Justin
If you need to ask about chattering around corners, then it doesn't do it.
When going around a corner at low speeds does the truck buck and rattle and sound like it's dragging a tire? (it won't since you have an open diff)
Justin
Last edited by hoxiii; Mar 19, 2004 at 01:29 PM.
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 207
Likes: 1
When I told my dad that it is an open differential he argued with me and said that it is straight posi. We jacked my truck up and spun the back tire. When it is in park they spin opposite directions but when in neutral they spin the same way. The rearend pushes the truck straight when going around corners. I have never heard of straight posi. Do you know what it is?
Posting Guru
Joined: Dec 1999
Posts: 1,903
Likes: 2
From: Copley, OH
What you have is NOT a posi. "Positraction" is a GM trademark; please don't use that sort of language to describe a Ford. What you have sounds like it's a very worn limited slip differential which Ford calls a "Trac-Lok." If the clutches were in good shape you would not be able to turn the wheels by hand with the tranny in park. They still have enough bite to lock the axles together when the tranny is in neutral.
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 207
Likes: 1
I got my great uncle who is a mechanic at Ford to look at my truck tonight. He also said that it is straight posi. He even used the term posi and said that there is nothing else to call it. It is not traction-lok because both wheels always spin.
Last edited by kellar; Mar 19, 2004 at 08:59 PM.
Trending Topics
Posting Guru
Joined: Dec 1999
Posts: 1,903
Likes: 2
From: Copley, OH
A Ford Trac-Lok is NOT a locker. It is a limited slip differential, similar in design to a GM Positraction. Your uncle may call it whatever he chooses, but the fact remains that "Positraction" is a GM trademark and should NEVER be used to describe a Ford.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
