Clutch fork travel

[ERA Chas]

I think Brent would have been aware of flywheel thickness with the 2 discs he spec'd.
If he sent it that way, I think it's the right part-he did preassemble before shipping parts.

[DanEC]

Originally Posted by ERA Chas

I think Brent would have been aware of flywheel thickness with the 2 discs he spec'd.
If he sent it that way, I think it's the right part-he did preassemble before shipping parts.

Chas - I'm not saying the flywheel choice was right or wrong - but flywheels come in a wide range of thicknesses. Pick a thicker flywheel and throw in a dual disk clutch and the accumulation of dimensions with a TKO6 600 transmission may raise up and bite you like I'm suspecting here. Probably never create an issue with a single disk clutch that represents most of the market. I don't imagine that Brent had the transmission in his shop to test fit. I'm still sort of surprised that Tremec doesn't caution about checking retainer clearance in their installation instructions since they have a big aftermarket.

[ERA Chas]

Originally Posted by DanEC

Chas - I'm not saying the flywheel choice was right or wrong - but flywheels come in a wide range of thicknesses. Pick a thicker flywheel and throw in a dual disk clutch and the accumulation of dimensions with a TKO6 600 transmission may raise up and bite you like I'm suspecting here.

Your point is good-I just think Brent would have accounted for that. Hopefully he'll weigh-in on this point.
And yes, no matter what the cause, Jeff has paid his dues thrice over with this problem. It's just not fun like this.
Hope the answer appears before he needs back surgery.

[lippy]

One more question (I really want to make sure I get this right):

When I put the trans in neutral and turn the rear wheels by hand, it is fairly smooth and easy.

Now that I've backed out the trans on its bolts 3/32", when I put the car in gear and depress the clutch, I can turn the rear wheels by hand. The clutch releases. But I do hear something rubbing a bit (sounds like the clutch), and there is a bit more resistance compared to turning the wheels in neutral. Of course, I'm spinning the internals of the trans when I do this, so this may be normal.

Does this sound right?

[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