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  #1  
Unread July 20th, 2018, 07:12 AM
Corbin Corbin is online now
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Open diff to Posi-Trac

I am wanting to swap out the 3rd member for a Posi-Trac setup for the 8 inch rear end. Are there any other changes that are required if I simply put in a Posi-Trac 3rd member?
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  #2  
Unread July 21st, 2018, 07:08 AM
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As long as it's a 28 Spline carrier you shouldn't need to change anything. You will need to run a friction modifier in your oil.
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1965 Hardtop, 289, Top loader, Torino power disk brakes, Tilt steering, 2 speed int wipers

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  #3  
Unread July 21st, 2018, 10:13 AM
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Corbin,

If you are still shopping for one... I bought one off eBay after having installed one (a 9" version) in a 69 Mustang for a friend who purchased his from the same place. It was lower in cost from all the others I saw; plus you got to choose the ratio, and it shipped with the required friction modifier.

Of course I'm not where I can look up the seller info, but will look it up, if interested.
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Roger Moore

63 "Flarechero"
powered by: '65 289-V8 | T5 | 8" TracLoc rear


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  #4  
Unread July 23rd, 2018, 12:42 PM
Corbin Corbin is online now
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Thank you Mike, I appreciate it.


Roger - Yes I am still looking for one. I wouldn't mind seeing what you have available. Please take your time, there is no rush. My plan for this week is to nail down a local engine builder for the stroker. I have it narrowed down to two shops and am going to visit one in Olympia today to see their layout and get a few questions answered.
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Corbin Johnson

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302, C4
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  #5  
Unread July 23rd, 2018, 06:23 PM
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I bought my 9" parts from Quick Perormance , I had an issue with excess runout on the ring gear when I put it all together. They stood behind there parts and sent me another set of gears. Some good info on there sight as well
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1965 Hardtop, 289, Top loader, Torino power disk brakes, Tilt steering, 2 speed int wipers

Mike Spears
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  #6  
Unread July 25th, 2018, 08:48 PM
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Luva65wagon Luva65wagon is offline
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I got mine from this seller if I recall correctly:
https://m.ebay.com/itm/8-INCH-FORD-T...from=R40&rt=nc

If that link doesn't work for some reason, the seller to search for on ebay is: tj1141

Can't remember exactly what I paid at this moment (need to be at home on my computer), but I think it's gone up a little since I got mine.
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  #7  
Unread July 26th, 2018, 11:45 AM
Corbin Corbin is online now
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Thank you Roger.

It blows me away how much money these posi units are going for. Guess I've been out of the game too long.

I did find a local seller that has one with a 3.00 gear for about half of the price of those on Ebay. All said and done, it may just be easier to buy a new one and bolt it up rather than buying a used setup, doing a gear swap and then install.
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