Spec 2+ vs Spec 3+ Clutch - Ford Mustang Forum
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post #1 of 2 (permalink) Old 08-23-2010 Thread Starter
Gene K's Avatar
Joined: Aug 2010
Location: Decatur
Posts: 9
Spec 2+ vs Spec 3+ Clutch

Im told these are now the same clutch other than the friction material. I remember guys used to have lots of trouble with high rpm shifts on the Spec 2+ as the clutch didnt fully release where as the Spec 3+ seemed to be fine,

Does anyone know if the issues for the Spec 2+ are a thing of the past or still with us?

Im having a lot of trouble with the factory clutch in a 2011 5.0 (pedal mod already done) sticking to the floor at less than 6850 rpm and have been offered an opportunity to be a development car. They are pushing hard to do the Spec 2+ instead of the Spec 3+ and Im really skeptical.

I believe their will be very little difference other than the hub spline between the 2005-2010 and 2011 Clutches.

Gene K

'14 GT A6, TVS 2300, VMP Tune, GT500 AB
Apex EC7, Michelin PSS, Steeda Comp Springs, Strano Bars, Koni Sports.
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post #2 of 2 (permalink) Old 08-24-2010
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dysan's Avatar
Joined: Jan 2005
Location: Williamstown
Posts: 398
I believe the high speed clutch issue on the 2011's has something to do with the cluth pedal assembly as well. A few of the big speed shops have swapped out the clutch pedal assembly with the one from the gt500 and it's helped. Lethal performance did a write up about it on the s197forum.

As for the spec clutches, the 2+ issues that i've read were failing slave cylinders. I've got the 3+in my 2005 with about 9k miles on it and probably 70 track passes and it's working great.

300 stroker @ 11:1 compression, FRPP Stage 2 heads, 127300 cams, 4r70W, Kooks 1 3/4" lt's with 3" H mid-pipe, FRPP stinger mufflers, B&M ratchet shifter, UPR LCA's, JPC race UCA. E-Force TVS. Engine built by Everett's specialty repair, tuned by Manuel @ tudyno.com 9.98 @ 136.55 1.39 60'
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