Limited Slip Rearend

Joe6pack_old · March 22, 2007 at 5:35 PM

I am curious as to how many of you with original cars have the limited slip trac loc rearend. My car has this option. I am curious as to how rare it is. If I recall correctly, it wasn't offered in high powered cars until 1966. Perhaps some of our experts can refresh my memory as to why it wasn't offered until '66.

BiffF15 · March 22, 2007 at 7:29 PM

My 66 has the 3:50 gears and limited slip (traction lock).

bobmannel · March 28, 2007 at 8:16 PM

Is your car an automatic? Ford parts books listed only a 3.50:1 rear with Equa-lock. The 3.50 was generally used with an automatic, although optional with the 4-speed. I don't think Ford trusted the Equa-lock limited-slip behind a high revving high performance engine -- probably anticipated too much warranty work. Torque sensitive locking rears would come out in 1968.

Joe6pack_old · March 29, 2007 at 5:01 AM

No, its a 4-speed.

66gtk · March 29, 2007 at 9:34 AM

My 3:50 OPEN rear is matted to a 4-speed. No equalock for my car!

SixT5HiPo · March 29, 2007 at 11:46 AM

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I don't think Ford trusted the Equa-lock limited-slip behind a high revving high performance engine -- probably anticipated too much warranty work. Torque sensitive locking rears would come out in 1968.

I agree...at that time (1965) Ford was concerned with warranty issues regarding the Equa-Lock. I was once told that the available lubricants were part of the problem at that time. Improved lubricants and additives came along, and by 1966, there was a shift in thinking at Ford, allowing the 9" Equa-Lock to be ordered with the HiPo.

RPM_old · April 20, 2008 at 6:34 PM

So the thinking is that the 65 Mustang got only a Limited Slip posi and you couldn't option a Detroit Locker?

SixT5HiPo · April 20, 2008 at 9:41 PM

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>

So the thinking is that the 65 Mustang got only a Limited Slip posi and you couldn't option a Detroit Locker?

Let's see if this can be sorted out correctly. In 1965, the Mustangs with a standard V-8 could be ordered with an Equa-Lock in the 8" rear axle. The HiPo 289 was specifically NOT available with the Equa-Lock in the 9"...The 1965 Shelby GT-350's were offered with the Detroit Locker.

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