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Old 12-12-2005, 06:25 AM
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Ford 9" posi/locker/trutrac ?

What advice could anyone give on the correct selection to my following-
The car - Willys coupe BBF 460[500BHP]/C6/9"/31" Hooziers driving on twisting roads.
Will 28 spline aftermarket axles be ok. [moser / strange].
Looking to run 4.11 gears [est 5,500rpm - 125mph].
But which diff? I have read that the Truetrac gives quiet cornering with locked drive when under power, are they as good as they sound [or not as the nodular [case] maybe].
Your expertise will be much appreciated to this UK island resident who is counting the days to Goodguys INDY in June 06. I`ll be there!! Yahoo!!

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Old 12-12-2005, 06:32 AM
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Quote:
Originally Posted by Ianmerry
What advice could anyone give on the correct selection to my following-
The car - Willys coupe BBF 460[500BHP]/C6/9"/31" Hooziers driving on twisting roads.
Will 28 spline aftermarket axles be ok. [moser / strange].
Looking to run 4.11 gears [est 5,500rpm - 125mph].
But which diff? I have read that the Truetrac gives quiet cornering with locked drive when under power, are they as good as they sound [or not as the nodular [case] maybe].
Your expertise will be much appreciated to this UK island resident who is counting the days to Goodguys INDY in June 06. I`ll be there!! Yahoo!!
I have the Trutrack in my truck. About 400 rwhp. Been in about 2 months and love it. No noise... as advertised. Others at performancetrucks.net also like it. Have heard no bad news about it.

Regards, Jim
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Old 12-14-2005, 01:34 AM
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A locker in an F truck is acceptable, but in a light(under 2700 lb) car only a teenager would tolerate it. I ran a detroit, then a Ford traction lock in my Holden ute(3400 lb). The Detroit was awfull on winding roads and the traction lock (genuine Ford) ate clutches - 1 side instead of 2, and I had to run a steel 'hat' as the stock Ford part would crack through the bolt holes.
If you are building a light toy I would suggest an open Ford centre with an ARB air locker. Cruise as a one wheeler then lock it at the track. Good luck, I too live on an island - bit bigger - I run 3.00 gears and a G60/15.
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Old 12-14-2005, 04:15 AM
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Thanks for your advise Jim & Ian, guess we`ll forget posi/locker and go with either Truetrac or airlocker [never gave this one a thought Ian] . The car will probably see around 2700-3000lb, advise on the 28 spline axles?
As I will have the axles made for the job and at present I have a 28 spline diff [ex 73 Lincoln] I was hoping to keep with the 28`s and purchase the diff at a later date.
Island 37 miles x 18 miles just a touch smaller Ian!! If you`ve ever heard of the TT races [motorcycle road racing], this is the place. I`m just sick of motorsickles everywhere when the sun comes out . Time for a Hot Rod to upset the ranks!!
Ian
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Old 12-14-2005, 01:01 PM
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I would talk to the axle manufacturer. Period.

As for diff, what is your intended useage?

True "lockers" are not good for driveability especially in the wet, but tolerated for street driven race cars. They are either locked or open..... no in between.

You will hate a "locker" on twisty roads... it makes the front end "push" straight ahead. When and IF it unlocks the car will dart and dodge all over the curve. You want to get something with smooth differential action. Trutrac is good, but I have never had one..... yet.

Last edited by xntrik; 12-14-2005 at 01:09 PM.
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Old 12-15-2005, 01:27 AM
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Yeah mate, heard about the TT. An Australian engineer - the late Phil Irving worked for Rudge, Velocette and Vincent. He designed the Rapide v - twin which became the Black Shadow. He also did some work on the OLDS (not Buick) alloy V8 and came up with the Repco Brabham F1 sohc engine, won world championships in 66 and 67 against Cosworth, Ferrari, Honda etc.
Yes the Isle of Mann is well known here and our Phillip island GP here attracts a lot of attention. Good luck with the rod, run over some bikes.
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