what posis fit in marks?

[ryanharrington]

my 97 apparently has an open diff.

 

[driller]

Any 8.8" Ford with 28 splines.

 

[Roadie]

The ones that come from the factory in the Cobra Mustangs with IRS are slightly different than the ones in the solid axle cars. There is some disagreement about whether the solid axle unit is okay to use in the IRS. However, many people on this board use the solid axle design without any problems.

 

[M Darrah]

Is it possible to find a complete rear-end nowadays or do you have to buy the kits? I heard you can no longer get them from Ford.

 

[ryanharrington]

gears are the same between the irs and none right?

 

[driller]

[div class="dcquote"][strong]Quote[/strong]
gears are the same between the irs and none right?
[/div]

Correct, the gears are the same. The installation kits are different.

 

[ryanharrington]

good times. maybe ill just get a factory posi any thoughts on them?

 

[driller]

The 'factory posi' is known as Traction Lock in Ford lingo, and is a simple spring loaded clutch pack type differential. I know several with quite a bit more HP than I that have the same setup with no problems.

 

[ryanharrington]

anyione have any reccomendations im gonna order this week

 

[logres]

[div class="dcquote"][strong]Quote[/strong]
anyione have any reccomendations im gonna order this week
[/div]

The traction Lok is good for street use and stock-mild drag racing.

Get an Eaton or Auburn if you are going to do track or autocross, or if you want better performance in snow.

 

[sleeper]

lincoln locker all the way!

 

[ryanharrington]

auburn is sittin in the garage. need me some gears now. just cant decide

 

[Jibit]

[div class="dcquote"][strong]Quote[/strong]
Is it possible to find a complete rear-end nowadays or do you have to buy the kits? I heard you can no longer get them from Ford.
[/div]

You're right Mark, Ford used to sell the cobra pumpkin, a direct fit but they no longer do. I'd bet you could find plenty of wrecked cobra's to get a used one though.

David O'Donnell
'97 Mark VIII LSC "Maxine II" (RIP Maxine I, 5-16-03)
'91 Mark VII BB "Monica"
'67 Thunderbird "Molly"