Are all 8.75 rearend positive traction

[joww3]

Hi, are all 8 3/4 rearend positive traction? Positive traction means both wheel have traction to move the car, right? and when the car is the a jack stand, what direction does the wheels turn when in neutral? thanks for the help.

Joe

[471_Magnum]

In order:
No.
Sorta.
Same direction w/ Sure-Grip. Opposite w/o Sure-Grip.

[andy74]

joww3,posi is a general motors term!
that being said,sure grip(mopar)will drive both wheels in a strait line,but there is a clutch pack that disengages for when you are cornering,or if one wheel became stuck.471 answered your other questions,i just thought you may want a better understanding of how it works!

[joww3]

  no more posit....tract...., all Sure Grip from now on. Mine is a 71 383 magnam, and it doesn't have a sure grip, it is a 8 3/4, and when on jack stand, wheel turns opposite direction. anyway to convert mine to a sure grip? do I have to buy a new comlete rearend? and thanks for clearing things up for me.

[andy74]

you can buy the sure grip,they arent cheap but they are out there!try mancin racing,or randys ring and pinion,or try looking at swap meets,e bay etc.

[Rolling_Thunder]

there are two types of sure grips used by the factory....    "cone" and "clutch"   if you buy a used one - DO NOT but cone style

[andy74]

there are two types of sure grips used by the factory....      "cone" and "clutch"     if you buy a used one - DO NOT but cone style

i forgot that part

[AKcharger]

Just weld the spider gears for an inexpensive sure grip...Yeeeeee Hawwww!

[471_Magnum]

Just weld the spider gears for an inexpensive sure grip...Yeeeeee Hawwww!

More like an inexpensive spool. Careful around the corners in the wet.

I agree with Rolling Thunder regarding used cones. Only way I'd mess with a cone would be if I pulled it out of a running car after testing it.

Unfortunately, installing a Sure-Grip isn't a project for a novice. So unless you know someone who can assemble one, you've either got to gamble on a used third member, or buck up and have one professionally built.

[Rolling_Thunder]

I wouldnt run a spool on the street...   even on the dry streets...    doesnt seem safe or logical to me...   plus wears your tired ALOT

[471_Magnum]

I wouldnt run a spool on the street... even on the dry streets... doesnt seem safe or logical to me... plus wears your tires ALOT

I agree. My comment was intended to be "tongue in cheek". Welding the spiders together is something the demo-derby guys do. They aren't worried safety or durability.

[joww3]

I saw a complete 9 3/4 rearend in the Mopar Muscle magazine, cost $1840. very expensive. or a Detroit TrueTrac for around $500, still a lot of money. I'll keep looking, maybe I'll find something more reasonable.