.150 clutch pack clearance

[standup303]

I have .150 clearance on my high speed drum with the wavy snap ring in (.050). I have a 4 disc setup so going for .048 (.012 each disc). Even if I go with a .106 flat ring I’ll be at .094 clearance.

How can I make this up now? I read I can use one of my old steels between the pressure plate and snap ring to close clearance…seems kind of jimmy rigged. Any advice on this one? Thanks in advance.

 

[413]

.048 is too tight, throw that wavy ring in the trash, they are the thing to use.
Using an old steel is to do, it won't hurt anything.

 

[AJ/FormS]

Here are the 1969 specs, For the 727;
Front clutch/standard;
3disc is; .036 to .085; per disc equals .012>.028/average is .013
4disc is; .024 to .125; per disc equals .006>.031/average is .019
Front/hi-perf;
4disc is; .066 to .123; per disc equals .016>.031/average is .024
5disc is; .022 to .079; per disc equals .0044>.0158/average .010
Rear clutch/Forward all:
is 025>045/number of discs not specified; average is; .035

for street;
I leave the wavy's in.
>The one in the Hi-drum softens the reverse hit. I hate when the trans bangs into reverse.
and at WOT, most of us don't get into third until 75 mph or higher, so who cares.
>The one in the Forward clutch softens the engagement from N/P into gear. I hate when the trans bangs into gear like a racecar.
Once it's in gear, the trans don't know it's there.
>I've tried it both ways on a kitted 904. First without, then with. I left them in there.
I built my 904 with ~.012 per disc, seemed ok. I've run more; trans didn't seem to care.

Jus saying.

 

[1WildRT]

When you run the tight end of the spec it tends to cause shift overlap, personally I'd look at adding another clutch and another steel... Might need a thinner pressure plate to do it but more clutches never hurts....

I agree with 413 that adding a used steel is an accepted way to tighten the clearance

And I agree with AJ for a street application the wavy snap rings soften the hit....

 

[Bewy]

If you want to reduce clutch free play.....
Get two friction plates. Scrape/remove the friction material from one side of EACH plate. Piggy back them in the clutch pack.

 

[oldkimmer]

U should have at minimum .015 per clutch if this is a stock build. Any kind of performance should v be e .020 per clutch. I have had to add an extra steel against the piston to take up some clearance. U can also mill the piston down .040 to add another clutch and steel. I’ve even milled the pressure plate for clearance. Kim

 

[standup303]

Thanks for the replies. Think I got it. Should have the 727 100% back together tomorrow.