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727 front clutch clearance question? #2590918
12/12/18 04:41 PM
12/12/18 04:41 PM
Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar Offline OP
master
451Mopar  Offline OP
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Aurora, Colorado
Working on a 1966 727. Normal front clutch clearance is 0.120+. Added an extra steel and now clearance is 0.053". That seems on the tight side, but when looking up the pre-1971 specs seems to be OK?
Currently has the 0.060" snap ring. Tried a thick Snap ring, but the drum is not machined to fit a snap ring over about 0.080"

Anyhow, in these early year 727s is the tighter clearance OK, or should I remove the extra steel, and just use some of the thicker 0.086" steels?

Last edited by 451Mopar; 12/12/18 04:42 PM.
Re: 727 front clutch clearance question? [Re: 451Mopar] #2590926
12/12/18 04:54 PM
12/12/18 04:54 PM
Joined: Jul 2008
Posts: 30,250
Florida STAYcation
dIc dOc Deity ! Online penguin-006
The village idiot's idiot
dIc dOc Deity !  Online Penguin-006
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Florida STAYcation
LOTS of variables .... first one - how many springs in the drum ?

Re: 727 front clutch clearance question? [Re: 451Mopar] #2590965
12/12/18 06:06 PM
12/12/18 06:06 PM
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Posts: 9,791
MI, usa
dvw Offline
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.012"-.015" per friction. 4 friction, .048"-.060"
Doug

Re: 727 front clutch clearance question? [Re: 451Mopar] #2590972
12/12/18 06:18 PM
12/12/18 06:18 PM
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Fulton County, PA
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CMcAllister Offline
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Fulton County, PA
Stock rebuild that you want to have OE performance and driveability is different from a performance/race unit. Have to build it for the intended use.


If the results don't match the theory, change the theory.
Re: 727 front clutch clearance question? [Re: CMcAllister] #2591030
12/12/18 08:47 PM
12/12/18 08:47 PM
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Bend,OR USA
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Cab_Burge Offline
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Originally Posted By CMcAllister
Stock rebuild that you want to have OE performance and driveability is different from a performance/race unit. Have to build it for the intended use.
iagree shruggy


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 727 front clutch clearance question? [Re: 451Mopar] #2591039
12/12/18 09:09 PM
12/12/18 09:09 PM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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BradH Offline
Taking time off to work on my car
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FWIW, mine is .90+" now and has 12 springs. John Cope told me to use 15 springs w/ my new CRT RMVB and would like to see the clearance down around .080", IIRC.

Somebody else already mentioned it's really all about what the trans is set up to use & do, so all I can do is 2nd that.

Re: 727 front clutch clearance question? [Re: 451Mopar] #2591064
12/12/18 09:55 PM
12/12/18 09:55 PM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Offline
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The .012"-.015" clearance per friction will fall inside the factory specified range for every 727 from 62-71. After 71 they were set slightly looser.
Doug

Re: 727 front clutch clearance question? [Re: 451Mopar] #2591279
12/13/18 01:10 PM
12/13/18 01:10 PM
Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar Offline OP
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451Mopar  Offline OP
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Aurora, Colorado
Most of the transmissions I have done were '71-up that is why I'm asking.
The piston only has 10 spring pegs and 10 springs. Just a TF-2 shift kit and the Raybestos Green front clutches with kolene steels.
Not sure why the specs on the earlier transmissions are a bit tighter than the '71-up specs?







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