what is posi trac?

Answer 1

its another name for Limited Slip Differential (LSD for short).
basically what it does... when you mash the gas pedal with a regular "open" differential, you only make 1 tire mark, with the LSD you get both sides spinning.

Answer 2

Posi Trac

Answer 3

Posi Track

Answer 4

Seriously? Limited slip and positrac are related, but NOT the same. A 1971 Tempest has a posi rear, while the same car with a different moniker, the 1971 Malibu has a limited slip. Which is why you will find a mallie sitting in a ditch watching the tempest run past it even though the tempest only has a 6 cylinder and the mallie has an 8! C'mon, youngsters, at least ask your daddy before making stuff up. With a posi rear end BOTH wheels turn ALL THE TIME. You pop the clutch and you get TWO black marks going up the road. Limited slip will only give you ONE line. When on muddy roads, limited slip will have one tire spinning away, wishing it could get a grip while the other, useless tire, barely moves and you're stuck. Positrac, on the other hand will pull you out, no problem. They quit making posi rear ends in about 1980 due to limited slip being cheaper and easier to move over to 4wd (closed vs. open systems and then awd). Yes, RC, you got it right...the rest of you...please ask daddy before answering if you don't know the right answer.

Answer 5

There have been both correct and incorrect answers in this. Posi-track is not a locker, it is a limited slip differential. It is also A GM brand name. Posi- trac acts as an open differential until there is sufficient difference between the two sides, then clutches are engaged that limit the difference. It normally remains open during cornering but kicks in during hard straight line acceleration.

Answer 6

In short, posi traction is short form for Positive Traction. It is also called Limited Slip Differential, but posi trac is a GM term. Posi is a differential that applies power to both wheels (mostly in high performance cars) and senses when one wheel starts spinning, so it reduces power to that wheel using a clutch mechanism (it's automatic). A common situation is when your turning, the power is reduced to the inside wheel so that you can turn, otherwise the car would be very difficult to turn. Differentials that apply the same power to both wheels at all times are call Lockers, and used mainly in drag racing cars.

All non performance and sub compact cars use open wheel, which means power only goes to one wheel at all times.

Answer 7

Good answers so far.
If you're thinking of going that direction be advised that "posi" has
it's negative sides as well as positive.
If you are familiar driving with this option it can get real tricky at
highway speeds on icy roads.Down-right dangerous if you"re a
rookie.
Reason being,that at higher speeds, the switch from one drive
wheel to the other will cause the car to "fish-tail","get loose" or
whatever you want to call it.An interesting ride no matter how
you look at it.
Personally,I really like the feature because of the improved trac-
tion,...and it's an excellent indicator that your vehicle has gotten
on a slippery surface such as "black ice." Whoaa,slow down.
You will appreciate more even wear on the driving tires as well.

Answer 8

Posi-trac is General Motor's term for their limited slip differentials. Ford calls theirs Trac-Lok and Chrysler is Sure-grip.
The function of all three is the same. They use a system of clutches in the third member to apply the same amount of power to both rear wheels, but will still slip enough to allow the differential to work.
As long is power is applied through the drive shaft, both wheels pull the same regardless of the surface. If one wheel is not touching the ground, as in jacked up, the other wheel will allow it to drive off the jack. If the power is applied by one wheel going faster than the other as when turning, the internal clutches slip allowing the differential to work.

Answer 9

This Site Might Help You.

RE:
what is posi trac?

Answer 10

posi trac is a limited...key word, LIMITED...so it still slips...they do not "LOCK" together..those are called "lockers"...limited slips allow both wheels to turn with the use of clutches...these clutches slip and wear out eventually..so going around corners, these clutches slip, but still give power to both wheels...if you were to have one tire on ice, and the other wedged between two rocks....you would actually think that you had an open differential, because only the one tire would turn, although, at least the other would "try".

Answer 11

A Positrac as I know it is much like a skid tire or track loader that the blade/loader/mower attachment or any number of add on tools can be exchanged to do a different operation. The arms that operate the tool can be switched from one end to the other. This enables the machine to be driven like a dozer with the engine in the front or with the engine in the rear so you can look down over the arms and watch the arms manuver an attachment such as a mower that can be raised high enough to be lowered over small trees to cut them to ground level.

There are many attachments including Sabre blades to bury undergroung cable. Variety of bucket models and scraper blades.

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