Posi Rear

[dadsbee]

The childish nonsense... lol Call it what ever you want, as long as it leaves TWO Black strips !

That said, the Wife's '67 Formula S x 383 - 4 gear came from the factory with a peg leg 3:23. Thank God, that coaster wheel helps it go straight!

 

[WileE]

The childish nonsense... lol Call it what ever you want, as long as it leaves TWO Black strips !

That said, the Wife's '67 Formula S x 383 - 4 gear came from the factory with a peg leg 3:23. Thank God, that coaster wheel helps it go straight!

Now, THAT's a moniker from way back

 

[eldubb440]

Twin-Spin would be a neat name

maybe for a Ford

 

[eldubb440]

The childish nonsense... lol Call it what ever you want, as long as it leaves TWO Black strips !

That said, the Wife's '67 Formula S x 383 - 4 gear came from the factory with a peg leg 3:23. Thank God, that coaster wheel helps it go straight!

.....and then you opine like a child

 

[33 IMP]

If your 69 GTX came with a 727 and the stock ratio, it could be either open or limited slip. (NOT posi! Some here will rake you over the coals for using a chevy term!)
If it had a performance ratio, sure grip automatically.
If it's a four speed, it came with a Dana, and in passenger cars ALL Dana 60s were suregrip.

 

[oldbee]

Lol, saw a Ferd Falcon straight 6, 3 on the tree burn “a” tire one time after football practice one time…. Yeah, he revved it up,we picked up the rear & dropped it.
It was glorious!!

 

[71Charger]

Posi what!?

 

[33 IMP]

Posi what!?

Posi track shun, son....lol.
I call my "limited slip".... spoo!

 

[73RRSunroof]

Both of my 69 Road Runners have 3.23 open differentials. Both are 4 speeds.

 

[33 IMP]

Both of my 69 Road Runners have 3.23 open differentials. Both are 4 speeds.

True, and correct. Stock on a 383 runner was an open 3.23, optional gear ratios and sg, at extra cost. 3.23 could be open or sg, 3.55-up were sg only. Dana 60 was not available in a 383 car.
But O.P. asked about a GTX. A 440 with a 4sp automatically (?) came with a Dana 60, and all passenger Dana's were suregrip.

 

[MiradaMegaCab]

PowerTrax Locker
click Click CLICK as it loads and unloads

 

[33 IMP]

View attachment 2015400
PowerTrax Locker
click Click CLICK as it loads and unloads

Louder or quieter than a real one, I wonder?
I've got a dapco locker in my 8 3/4 (clicking don't bother me a bit) and I contemplated a powertrax for my 9", but I went a different way.....(#28).

 

[RemCharger]

True, and correct. Stock on a 383 runner was an open 3.23, optional gear ratios and sg, at extra cost. 3.23 could be open or sg, 3.55-up were sg only. Dana 60 was not available in a 383 car.
But O.P. asked about a GTX. A 440 with a 4sp automatically (?) came with a Dana 60, and all passenger Dana's were suregrip.

I thought there was something about a 3.91 RR that blew up the diff, got a replacement D60 for warranty?

 

[33 IMP]

I thought there was something about a 3.91 RR that blew up the diff, got a replacement D60 for warranty?

Possible, I suppose. I've never heard of it. I'd sure encourage that solution if I had a busted-up 8 3/4 and a 4speed!