1939 trans to 8BA Pressure Plate ?

[37fatfender]

What pressure plate should I use when installing an 8BA to a 39 trans? I am using the 8BA flywheel. I realize I may have to have it drilled for the smaller pressure plate. Does anyone know the NAPA part # ?

 

[thunderbirdesq]

You can use the 9" or 10" early pressure plate and the 8BA flywheel WILL have to be redrilled. I just went through the same thing. NAPA 10" PP is part # NCL CA7346

 

[Walt Dupont--Me.]

If you have the 8BA flywheel with the 9-1/2 pressure plate bolt patten, you can use the early 9in. clutch disc. Walt

 

[Bruce Lancaster]

But you can't use the 9 1/2 pressure plate because fingers are for the small late model throwout...
Here's what I have learned over the years: Late flywheels came in 11" truck, 9 1/2 (common) and 10" heavy duty passenger (rare), and Borg & beck for '49--early 1951 Merc and '51-53 Merc.

Pressure plates: The 11" truck and the early version of the B&B Merc are fully compatible, disc and plate and throwout, with early Ford transmissions. The 11" is toodamnheavy for hotrods. Late 1951-53 Merc plate and disc are incompatible with early Ford but can be swapped keeping same flywheel. There are modern replacements for the somewhat scarce B&B plate.
Late Ford passenger 9 1/2 and 10" parts have wrong fingers for early throwout, disc has wrong spline. 10" can be swapped out for '48 Ford parts but is rare. Clutch rebuilders can rebuild the 9 1/2 plate with early fingers and put early center into disc apparently.
So...those are the issues and problems with crossing 49th street. The commonest parts are no good for the early swap...
NAPA part numbers for early clutch parts would be good to know...few NAPA's have anyone really good at digging in the catalogs any more.

 

[Bruce Lancaster]

10" NAPA!
Clutch Disc - Remfd
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[Bruce Lancaster]

Reman is now considered best by many due to wonky Chines pressure plates coming through

 

[Bruce Lancaster]

And 9"!
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[37fatfender]

I have the CA7346 pressure plate,,,,,,so what throw out bearing do I use? Again..39trans to 8BA.

 

[Bruce Lancaster]

You just need normal Ford 78 bearing, fits all the early flatheads and later trucks and Mercs. Joblot. Probably modern parts stores can get too, if they can read their catalogs. See lubrication warnings in clutch section of Rumbleseat's online book.

 

[Chris Marshall]

The 11" truck parts are plentiful here in the midwest (all the old farm trucks), but major overkill for most car & street use. These have 9 springs in the pressure plate. In my T roadster that has an 8BA with 39 ****** I took a NOS 11" pp and removed 3 of the springs. Works great and saves a ton of wear and tear on the knee!!

 

[jack39nyc]

I have a 39 tudr delx with a 59ab what size clutch do i use? I have a knock in the bell housing when I engage the clutch. Former owner replaced clutch,presser plate and bearing because of this knock. It still there. any body ever had this problem?
Thanks Ford Barn, Jack