The Ford Barn

inex01 · 02-13-2017, 11:10 AM

Here is the problem we have a good 32 also a good 34 transmissions, they are exactly the same and we have a 10" pressure plate that hits the bell housing on the trans and we can not bolt it in, I understand that the 39 transmission has a deeper bellhousing but if possible we want to use one of the ones we have, so would anyone know of what pressure plate we can use?

deuce lover · 02-13-2017, 11:15 AM

A 9" is what was used originally.10" is way to much IMO.

rotorwrench · 02-13-2017, 11:17 AM

The 9-inch clutch assembly would likely fit OK. A 10-inch not so good. I've heard folks say that a relief can be ground in the trans case but I've never attempted that.

inex01 · 02-13-2017, 11:17 AM

Quote:

Originally Posted by deuce lover

A 9" is what was used originally.10" is way to much IMO.

OK, but the flywheel is drilled for a 10" or is there a 9" that you are aware of that will fit the 10" bolt pattern ?

Henry/Kokomo · 02-13-2017, 11:21 AM

You may well have to have the flywheel re-drilled.

flatheadmurre · 02-13-2017, 11:26 AM

Sponsored Links (Register now to hide all advertisements)

Go 9" or grind the gearbox...
It hits down at the clutchshaft and up at the inspectionhole.

AnthonyG · 02-13-2017, 11:30 AM

Are you sure your seated into your pilot bearing all the way. Also check the ultimate authority Vanpelt, they will be very helpful in discussing it with you.
http://www.vanpeltsales.com/index.htm

flatheadmurre · 02-13-2017, 11:33 AM

Been there done that some early gearbox castings don´t like 10" pressureplates !
I can dig out 2 different castings and mark up where you need to grind it if it would help ?

AnthonyG · 02-13-2017, 11:34 AM

Also on the old reconditioned flywheels, I had one that was drilled for a 10" and a 9" PP. The 9" pattern was perfectly concentric, the 10 bolt pattern which I was trying to use as you are, was .090" out of concentric causing it to interfere with the trans bell housing section. I figured someone had drilled the original 9" to a 10" and screwed it up.

cas3 · 02-13-2017, 11:36 AM

your 39 motor should have had the 9" flywheel on it already. the one with the big blob of weight around it. have that cut off and balanced and away you go!

rotorwrench · 02-13-2017, 01:52 PM

Most folks due cut the lip down on the older flywheels if that's what you have but I don't know if a 10 will fit without cutting off the lip.

Bruce Lancaster · 02-13-2017, 02:19 PM

When Ford went to "Long" pattern clutches in 1935 they altered the trans case...if you look closely, the '32 bell area tapers in smoothly from the flange, while a '35-48 goes straight back from flange for about 1" and then tapers. I think they also slightly lowered the cross shaft and added a longer fork to compensate. This was because some cars got the 11" clutch then later the 10.*
I have been told but have never verified that using the 10" in '32-4 cases requires only minor grinding in areas like the bushing supports for clutch cross shaft. I'd put some crayon or grease on suspicious areas and rotate to study exactly where the interference is.

* For additional confusion, I have seen '35-6's with apparently original serialed trans cases using the '34 style case. This generally did not matter in those years since probably 90% of cars used the 9".

inex01 · 02-13-2017, 03:34 PM

This engine had a modern flywheel on it because its last home was in a Hot Rod, we are in the process of doing an "Old School" Hot Rod using a 31 Model A, We have a friend who may have a 39 Transmission and if not will just go with a 9" clutch & pressure plate. I have the link to our website that is the page of our build you may be interested in looking at, Boy are we having a good time doing this build, it is not professional just like back in the day, yea the welds look terrible but they are strong, just a bunch of old Geezers! Hey everyone thanks so very much

http://www.cruisein.us/old-school-hot-rod-model-a-build

Mart · 02-13-2017, 03:34 PM

The trans in my 33 showed signs of fouling the 10" clutch. It must have made a helluva racket.

inex01 · 02-13-2017, 03:39 PM

Quote:

Originally Posted by Mart

The trans in my 33 showed signs of fouling the 10" clutch. It must have made a helluva racket.

No never even got it installed, we found the problem during assembly and immediately stopped all work till we found the solution, I am very comfortable with stock Model A's but obviously do not have a clue of what works and not works on these great old Flatheads, but is a enjoyable learning aadventure and you guys are a BIG HELP! very appreciated

flatheadmurre · 02-13-2017, 03:42 PM

If you look at a 78 case you have a radius cut into the shaft support and the inspection hole doesn´t have a thicker edge going into the housing.
Theese 3 places has to be ground to fit a 10"
It´s not much that hits...i have a casing that was assembled and fired up before the guys doing it realised it was an interferance fit

02-13-2017, 11:10 AM	#1
inex01 Senior Member Join Date: Dec 2010 Location: Rockville, Maryland Posts: 350	Need Help Have a 32 Tans bolting to a 39 Flatty Here is the problem we have a good 32 also a good 34 transmissions, they are exactly the same and we have a 10" pressure plate that hits the bell housing on the trans and we can not bolt it in, I understand that the 39 transmission has a deeper bellhousing but if possible we want to use one of the ones we have, so would anyone know of what pressure plate we can use? __________________ Chuck McDonald, Member of AACA, Model A Club, NRA

02-13-2017, 11:15 AM	#2
deuce lover Senior Member Join Date: May 2010 Location: Southern France Posts: 5,301	Re: Need Help Have a 32 Tans bolting to a 39 Flatty A 9" is what was used originally.10" is way to much IMO.

02-13-2017, 11:17 AM	#3
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,422	Re: Need Help Have a 32 Tans bolting to a 39 Flatty The 9-inch clutch assembly would likely fit OK. A 10-inch not so good. I've heard folks say that a relief can be ground in the trans case but I've never attempted that.

02-13-2017, 11:21 AM	#5
Henry/Kokomo Senior Member Join Date: May 2010 Location: Kokomo, Indiana Posts: 1,731	Re: Need Help Have a 32 Tans bolting to a 39 Flatty You may well have to have the flywheel re-drilled. __________________ Henry

02-13-2017, 11:26 AM	#6
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: Need Help Have a 32 Tans bolting to a 39 Flatty Sponsored Links (Register now to hide all advertisements) Go 9" or grind the gearbox... It hits down at the clutchshaft and up at the inspectionhole.

02-13-2017, 11:30 AM	#7
AnthonyG Senior Member Join Date: May 2013 Location: Pa. Posts: 2,163	Re: Need Help Have a 32 Tans bolting to a 39 Flatty Are you sure your seated into your pilot bearing all the way. Also check the ultimate authority Vanpelt, they will be very helpful in discussing it with you. http://www.vanpeltsales.com/index.htm __________________ Nomad

02-13-2017, 11:33 AM	#8
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: Need Help Have a 32 Tans bolting to a 39 Flatty Been there done that some early gearbox castings don´t like 10" pressureplates ! I can dig out 2 different castings and mark up where you need to grind it if it would help ?

02-13-2017, 11:34 AM	#9
AnthonyG Senior Member Join Date: May 2013 Location: Pa. Posts: 2,163	Re: Need Help Have a 32 Tans bolting to a 39 Flatty Also on the old reconditioned flywheels, I had one that was drilled for a 10" and a 9" PP. The 9" pattern was perfectly concentric, the 10 bolt pattern which I was trying to use as you are, was .090" out of concentric causing it to interfere with the trans bell housing section. I figured someone had drilled the original 9" to a 10" and screwed it up. __________________ Nomad

02-13-2017, 11:36 AM	#10
cas3 Senior Member Join Date: Jan 2011 Location: sw minnesota Posts: 4,567	Re: Need Help Have a 32 Tans bolting to a 39 Flatty your 39 motor should have had the 9" flywheel on it already. the one with the big blob of weight around it. have that cut off and balanced and away you go!

02-13-2017, 01:52 PM	#11
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,422	Re: Need Help Have a 32 Tans bolting to a 39 Flatty Most folks due cut the lip down on the older flywheels if that's what you have but I don't know if a 10 will fit without cutting off the lip.

02-13-2017, 02:19 PM	#12
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: Need Help Have a 32 Tans bolting to a 39 Flatty When Ford went to "Long" pattern clutches in 1935 they altered the trans case...if you look closely, the '32 bell area tapers in smoothly from the flange, while a '35-48 goes straight back from flange for about 1" and then tapers. I think they also slightly lowered the cross shaft and added a longer fork to compensate. This was because some cars got the 11" clutch then later the 10.* I have been told but have never verified that using the 10" in '32-4 cases requires only minor grinding in areas like the bushing supports for clutch cross shaft. I'd put some crayon or grease on suspicious areas and rotate to study exactly where the interference is. * For additional confusion, I have seen '35-6's with apparently original serialed trans cases using the '34 style case. This generally did not matter in those years since probably 90% of cars used the 9".

02-13-2017, 03:34 PM	#13
inex01 Senior Member Join Date: Dec 2010 Location: Rockville, Maryland Posts: 350	Re: Need Help Have a 32 Tans bolting to a 39 Flatty This engine had a modern flywheel on it because its last home was in a Hot Rod, we are in the process of doing an "Old School" Hot Rod using a 31 Model A, We have a friend who may have a 39 Transmission and if not will just go with a 9" clutch & pressure plate. I have the link to our website that is the page of our build you may be interested in looking at, Boy are we having a good time doing this build, it is not professional just like back in the day, yea the welds look terrible but they are strong, just a bunch of old Geezers! Hey everyone thanks so very much http://www.cruisein.us/old-school-hot-rod-model-a-build __________________ Chuck McDonald, Member of AACA, Model A Club, NRA

02-13-2017, 03:34 PM	#14
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,744	Re: Need Help Have a 32 Tans bolting to a 39 Flatty The trans in my 33 showed signs of fouling the 10" clutch. It must have made a helluva racket.

02-13-2017, 03:42 PM	#16
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: Need Help Have a 32 Tans bolting to a 39 Flatty If you look at a 78 case you have a radius cut into the shaft support and the inspection hole doesn´t have a thicker edge going into the housing. Theese 3 places has to be ground to fit a 10" It´s not much that hits...i have a casing that was assembled and fired up before the guys doing it realised it was an interferance fit