question mates i bought a 1976 4x4 390 engine extended cab took it to the beach one day went on the sand and got stuck the back passenger side tire was the only one rotating why? any advice or how to solve this problem plss let me know wanna take this puppy back on the trails

 

There isn't a locker in the rear. You need to buy and install one.

 

Yep, what you have is limited slip differential

 

You mean open differential is what he has.

 

any solutions?

 

What size is your truck or axle?

 

Detroit Locker Dana 60, 16 Spline 4.10 and down

Thinking you need this one but not sure. I saw your profile so I think you have a F250. Not sure which D60 you have though. You will need to know what splined axle you have.

 

A common misconception is that there is a difference between limited slip and posi. They're the same thing. The different manufacturers had many different names for the same thing. Limited slip, posi-traction, sure grip, etc. are all brand names for a "posi" rear. They all work the same way. The exception to the rule is "Locker". These differentials have a tooth and jaw design that actually lock the spider gears mechanically.

If it's not posi, it's an open differential.

My question is why didn't the front left tire spin as well? In 4WD, the right rear AND left front should spin. You may have an issue with the hubs or transfer. To clarify, you DID get out and lock the hubs in, correct? You DID have the transfer case in 4HI, correct?

Next time you get stuck, try dragging the brakes while you ease on the gas. This fools the differential into spinning both tires. If one wheel cannot spin freely, it forces power to the other wheel and will spin both. (until torque applied overcomes brake grab on the right rear) which is why some people think their rear is "limited slip" when it's really an open end differential.

 

^^exactly


Detroit lockers are fine for the trail but can be quirky on the road.....For mainly road use......get this......
Performance Products | Detroit Truetrac Differentials