Clutch fork travel

[blykins]

Dyno day today, been a long day.

Ok, let's see....

This is an all McLeod setup, flywheel, clutch, and fork. Their flywheels are thicker than the RAM flywheels I've used, the bolts don't stick through the back of the crank flange like they do with the RAM. With that being said, this is a combo I've used multiple times over, with both FEs and 385s. I've never ran into this issue before. Didn't have the trans here, Jeff received it several months ago.

Jeff, it's going to be different when the trans is in gear and the clutch is engaged. Lots more stuff turning, like the discs, synchros are locked to the gears in the trans, etc.

[DanEC]

If I remember right - his build used an aluminum block also. Could be a few hundreds of an inch difference in crank flange to rear block machined surface distance than original Ford. A few hundreds more flywheel thickness. Quicktime bellhousing overall depth could be slightly different than stock Ford. Lots of tolerances that could go a little this way or that way - or all in one direction.

I don't remember ever spinning a transmission from the rear wheels. Makes sense it would feel a little different in gear. I think in neutral the countershaft and gears are primarily turning only. In gear it's picking up the input shaft and the clutch disks may be lightly touching on the clutch plates as they spin because they haven't been fully seated in. I know that putting a new bearing retainer on a Muncie there is a lot of drag on the input shaft before installing. After it's been run a little bit the input shaft is back to wobbling around as loose as a goose because of the front ball race bearing. But, really need to check the back disk plate for any damage.

[patrickt]

Lippy, I ran across this Mcleod dual disk on a TKO thread over on the FF forum. Kind of interesting.
Duel Disc clutch question - FFCars.com : Factory Five Racing Discussion Forum

[blykins]

The street twin is an entirely different clutch kit than the RST that we are using here. I've never had to trim with this application before which is what's weird, but I've come to accept out of the ordinary stuff with aftermarket parts.

[lippy]

I pulled the trans and measured all of the clearances. It does look like there is interference between the bearing retainer and clutch splines. I'll take the retainer to the machine shop Monday and take 9/32" off, which leaves 0.100" for clutch wear plus a slight margin for safety. Hopefully it does the trick.