HwyStar
Registered User
I was hoping to be further along than this by now, but im happy to at least be working on the car.
I spent a lot of time cleaning under there with kerosene and a rag. The original diff was slinging oil everywhere for a long time.
Here is the difference between long and short tab clutches.
And, short tab will work. I used the clutch and spring kit for 03-04 cobra 109.00 shipped from summit.
The original iron case fully assembled was 74#.
The aluminum casefully assembled was 56#. Not as much difference as i thought it would be.
Another difference i found was the cross pin and pinion gears size. Usually i would buy a Auburn Pro and use it. But, jm going cheap so i threw this together out of parts i had. It looks like the fn10/mn12 cars use a wimpy cross pin and pinion gears set up. I found this out by accident when i tried to use pin and pinion gears from a f150. They wouldnt fit in the track lock body from my cougar. The original pin was badly gauled to the point that it blued one of the pinion gears. So, i just used a pin and gears out of an open diff from a mark viii i had on the shelf.
Oh, whats the deal with the axle shafts? I thought someone here told me the mark viii axles were tougher. The shafts for an SC have way more meat on them. The only thing i can see better about the mark viii shafts is on the out board joint there is a nice transition fromm the splines to the joint. I figure it would make the outboard joint stronger. But, the shaft is so much narrower.
I spent a lot of time cleaning under there with kerosene and a rag. The original diff was slinging oil everywhere for a long time.
Here is the difference between long and short tab clutches.
And, short tab will work. I used the clutch and spring kit for 03-04 cobra 109.00 shipped from summit.
The original iron case fully assembled was 74#.
The aluminum casefully assembled was 56#. Not as much difference as i thought it would be.
Another difference i found was the cross pin and pinion gears size. Usually i would buy a Auburn Pro and use it. But, jm going cheap so i threw this together out of parts i had. It looks like the fn10/mn12 cars use a wimpy cross pin and pinion gears set up. I found this out by accident when i tried to use pin and pinion gears from a f150. They wouldnt fit in the track lock body from my cougar. The original pin was badly gauled to the point that it blued one of the pinion gears. So, i just used a pin and gears out of an open diff from a mark viii i had on the shelf.
Oh, whats the deal with the axle shafts? I thought someone here told me the mark viii axles were tougher. The shafts for an SC have way more meat on them. The only thing i can see better about the mark viii shafts is on the out board joint there is a nice transition fromm the splines to the joint. I figure it would make the outboard joint stronger. But, the shaft is so much narrower.
