So, I have a 71 -72 motor (FK makes it that year per V.B.)
Yet I pull off a 10 spline 7 1/4 disk, which matches the Fly wheel and
pressure plate.
I don't have any pictures of a MK4, was it the same body style as the 1500?
Pat 63 Spitfire ( with some newer parts)
Barry Schwartz wrote:
> >Undoubtedly, you ordered a clutch for the Mk1 and got the smaller one.
> >When it comes to the MkIV and 1500 clutches, it gets a bit dicier. The
> >reason is while the pressure plate is virtually the same, the disks are
> >different, owing to the different splines on the transmission's pilot
> >shaft. The Disk for all the three rail transmissions has the same
> >splines (10 of them). The single rail transmissions have finer splines
> >and therefore more of them. If you order a 3-piece clutch setup be sure
> >that you specify whether your transmission is a single rail (late
> >Spitfire) or a 3-rail (early one). You should get the one for the MkIV
> >if you have a 3-rail tranny connected to the MkIV engine.
> ******************************************
> Actually it's a slight bit diceier than that. Up thru 1972, the disk is a
> 6-1/2 x 10 spline. From 73-74 it's a 7-1/4 x 10 spline, and then (1975 on)
> it becomes a 7-1/4 x 20 spline (single rail). The pressure plate would be
> sized accordingly, so up thru 72 it's a 6-1/2 incher, and from 73 on it
> would be a7-1/4 inch. Anything with a single rail transmission should be a
> 7-1/4 x 20 spline, but a 3 rail could have a 6-1/2 or a 7-1/4 dia x 10
> spline setup depending upon what year flywheel (or engine) it has -
>
> Barry Schwartz (San Diego) bschwart@pacbell.net
>
> 72 PI, V6 Spitfire (daily driver)
> 70 GT6+ (when I don't drive the Spit)
> 70 Spitfire (long term project)
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