posi trac

ponyexpress289 · 05-07-2002, 10:26 PM

well i have told yall i am getting juice for my 289 and my dad said since i dont have posi i need to well how much is it? where can i get it ? are there different kinds??
and also can it install quick and easy on my rearend?

thx alot

MetalHead · 05-08-2002, 12:44 AM

are you dead set on a posi, or are you open to other differentials? there is a locker differential made by powertrax, its relatively cheap as far as diff's go and it can be installed in your garage in just a couple of hours with no special tools. here is the link:

http://powertrax.com/locker.htm

you can get it on summitracing.com for about $300 just a suggestion

ponyexpress289 · 05-08-2002, 01:47 PM

jeese thats alot i was hoping double digits
but i dont want a new rearend just something i can stick inthere to have posi

but thx

Rev · 05-08-2002, 08:17 PM

I think you can install that Power-Trax carrier into your Ford 8" or 9" for around $500 or so doing the work yourself. Check with Summit for prices and tech advice.

Rev

Ron1 · 05-09-2002, 09:17 PM

An auburn limited slip is $300.00, a Detroit locker is about $400.00 or the cheapest of course is a spool $150.00, but that would make street driving almost impossible. If you do get "the juice" you should also make some very simple mods to the rear end housing to strenghten it, because damage will happen.

Ron

ponyexpress289 · 05-09-2002, 10:40 PM

y would it be almost impossible to drive?
its a good price though
could i leave it non posi with juice?

Ron1 · 05-09-2002, 11:06 PM

A spool ties the axles together so they turn at the same speed. An Auburn or Detroit Locker allow each wheel to turn at it's own speed when turning. With a spool it sorta drags the outside tire along when turning and you will wear the tires out real fast. Spools are really meant for drag racing applications.

You could run N2O with an open (non posi) rear end, but you will have absolutely zero traction.

Ron

ponyexpress289 · 05-09-2002, 11:12 PM

with a spool one tire spins and the other is not but draggin as if the brakes where applied to that 1 tire???
or do they both spin at same time and rotate the same ( is that how they will wear faster , if this is it i dont mind i can always get new tires )

Ron1 · 05-10-2002, 12:35 AM

When turning one tire rotates at one speed, the outside tire at another. With a spool they both turn at the same rate, so one or the other will drag. By the way, is this an 8 or 9 inch? Depending on which one, you might check E-Bay...I saw a bunch of 9 inch Ford Detriot lockers...some fairly reasonably

priced.

Ron

Rev · 05-10-2002, 12:39 PM

Don't the Detroit Lockers make that clicking or ratcheting sound when cornering? I've heard it can drive a person crazy on the street.

Rev

ponyexpress289 · 05-10-2002, 01:39 PM

you prob. think im dumb but i still dont understand the dragging
please explain in detail
thx

Rev · 05-10-2002, 02:36 PM

Since both tires rotate at the same rate with a spool (locked differential), and since each tire must roll over a differnt length of pavement, then some slippage of tire to pavement has to happen.

It might be dragging of the outside tire on the curve, or it could be spinning of the inside tire of the curve (more likely), but one or the other tire has to slip on the pavement if you go around a corner with a spool (locked rear axle).

Hope this makes sense.

Rev

Ron1 · 05-10-2002, 04:35 PM

That's what I was trying to say....thanks Rev.

Ron

Rev · 05-10-2002, 04:46 PM

Ron, you already said it correctly. I was only trying to rephrase it so as to give it another slant. You were the one that made it clear to begin with.

Rev

ponyexpress289 · 05-12-2002, 12:21 AM

well that still really doesnt help anywayz thx alot though

Rev · 05-12-2002, 05:02 PM

Well, I'm sorry that the explanations didn't help. We gave it our best shots. If there's something specific that needs clarification, I'll bet there are some that will attempt further explanation.

Rev

Ron1 · 05-12-2002, 05:46 PM

One more try....draw two curves on a piece of paper. One inside the other, like the tires on a car taking a right turn. The outside tire will have to rotate more often then the inside tire in order to keep up. If the axles are locked together, the one that has to rotate more often will drag along because it it rotating at the same speed as the inside tire. In a Detroit Locker or an Auburn there is a ratchet device that will keep that from happening.

ponyexpress289 · 05-13-2002, 01:35 PM

thx alot

05-07-2002, 10:26 PM	#1
ponyexpress289 Registered Member Join Date: Apr 2002 Location: rowlett Posts: 136	posi trac well i have told yall i am getting juice for my 289 and my dad said since i dont have posi i need to well how much is it? where can i get it ? are there different kinds?? and also can it install quick and easy on my rearend? thx alot

05-08-2002, 12:44 AM	#2
MetalHead Registered Member Join Date: Feb 2002 Location: Monterey, CA Posts: 76	are you dead set on a posi, or are you open to other differentials? there is a locker differential made by powertrax, its relatively cheap as far as diff's go and it can be installed in your garage in just a couple of hours with no special tools. here is the link: http://powertrax.com/locker.htm you can get it on summitracing.com for about $300 just a suggestion __________________ 67 Coupe 289, 2 1/4'' pipes w/ Flowmasters Edelbrock 600 cfm 4bbl carb, Edelbrock Airgap intake Hooker headers, MSD Ignition system Next: new tranny, T5 or Toploader

05-08-2002, 01:47 PM	#3
ponyexpress289 Registered Member Join Date: Apr 2002 Location: rowlett Posts: 136	cost jeese thats alot i was hoping double digits but i dont want a new rearend just something i can stick inthere to have posi but thx

05-08-2002, 08:17 PM	#4
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	I think you can install that Power-Trax carrier into your Ford 8" or 9" for around $500 or so doing the work yourself. Check with Summit for prices and tech advice. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

05-09-2002, 10:40 PM	#6
ponyexpress289 Registered Member Join Date: Apr 2002 Location: rowlett Posts: 136	spool y would it be almost impossible to drive? its a good price though could i leave it non posi with juice?

05-09-2002, 09:17 PM	#5
Ron1 Registered Member Join Date: Sep 1999 Location: Vancouver, WA USA Posts: 439	An auburn limited slip is $300.00, a Detroit locker is about $400.00 or the cheapest of course is a spool $150.00, but that would make street driving almost impossible. If you do get "the juice" you should also make some very simple mods to the rear end housing to strenghten it, because damage will happen. Ron

05-09-2002, 11:06 PM	#7
Ron1 Registered Member Join Date: Sep 1999 Location: Vancouver, WA USA Posts: 439	A spool ties the axles together so they turn at the same speed. An Auburn or Detroit Locker allow each wheel to turn at it's own speed when turning. With a spool it sorta drags the outside tire along when turning and you will wear the tires out real fast. Spools are really meant for drag racing applications. You could run N2O with an open (non posi) rear end, but you will have absolutely zero traction. Ron

05-09-2002, 11:12 PM	#8
ponyexpress289 Registered Member Join Date: Apr 2002 Location: rowlett Posts: 136	sooooooo with a spool one tire spins and the other is not but draggin as if the brakes where applied to that 1 tire??? or do they both spin at same time and rotate the same ( is that how they will wear faster , if this is it i dont mind i can always get new tires )

05-10-2002, 12:35 AM	#9
Ron1 Registered Member Join Date: Sep 1999 Location: Vancouver, WA USA Posts: 439	When turning one tire rotates at one speed, the outside tire at another. With a spool they both turn at the same rate, so one or the other will drag. By the way, is this an 8 or 9 inch? Depending on which one, you might check E-Bay...I saw a bunch of 9 inch Ford Detriot lockers...some fairly reasonably priced. Ron

05-10-2002, 12:39 PM	#10
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Don't the Detroit Lockers make that clicking or ratcheting sound when cornering? I've heard it can drive a person crazy on the street. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

05-10-2002, 01:39 PM	#11
ponyexpress289 Registered Member Join Date: Apr 2002 Location: rowlett Posts: 136	sorry you prob. think im dumb but i still dont understand the dragging please explain in detail thx

05-10-2002, 02:36 PM	#12
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Since both tires rotate at the same rate with a spool (locked differential), and since each tire must roll over a differnt length of pavement, then some slippage of tire to pavement has to happen. It might be dragging of the outside tire on the curve, or it could be spinning of the inside tire of the curve (more likely), but one or the other tire has to slip on the pavement if you go around a corner with a spool (locked rear axle). Hope this makes sense. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

05-10-2002, 04:35 PM	#13
Ron1 Registered Member Join Date: Sep 1999 Location: Vancouver, WA USA Posts: 439	That's what I was trying to say....thanks Rev. Ron

05-10-2002, 04:46 PM	#14
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Ron, you already said it correctly. I was only trying to rephrase it so as to give it another slant. You were the one that made it clear to begin with. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

05-12-2002, 12:21 AM	#15
ponyexpress289 Registered Member Join Date: Apr 2002 Location: rowlett Posts: 136	o ok well that still really doesnt help anywayz thx alot though

05-12-2002, 05:02 PM	#16
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Well, I'm sorry that the explanations didn't help. We gave it our best shots. If there's something specific that needs clarification, I'll bet there are some that will attempt further explanation. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

05-12-2002, 05:46 PM	#17
Ron1 Registered Member Join Date: Sep 1999 Location: Vancouver, WA USA Posts: 439	One more try....draw two curves on a piece of paper. One inside the other, like the tires on a car taking a right turn. The outside tire will have to rotate more often then the inside tire in order to keep up. If the axles are locked together, the one that has to rotate more often will drag along because it it rotating at the same speed as the inside tire. In a Detroit Locker or an Auburn there is a ratchet device that will keep that from happening.

05-13-2002, 01:35 PM	#18
ponyexpress289 Registered Member Join Date: Apr 2002 Location: rowlett Posts: 136	ok thx alot

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