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In searching for a new clutch kit for my 51 project I found it almost impossible to identify the correct kit. The problem being they all list the disc size but when trying to verify the pressure plate size there is no universal measurement. When checking by application several list the PP as 10" while mine measures 9-1/4". My concern is that even though my 54 engine had the larger PP it still had the 9-1/8" disc. There are no measurements in my parts book for the pressure plates. I did measure the one that came out of the 51 w/the 216 and also the flywheel bolt circle. Does anyone have a kit number for a clutch with the 9-1/8" disc and a 9-1/4" PP . Trying to prevent having to return a wrong one.
Steve D
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ChatMaster - 25,000
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The clutch pressure plate assembly for a 1951 car with a standard 9 inch disc was Chevrolet part # 838955, changed to 3836003 in 1953. Fits 1938-1953 cars and 1/2 ton trucks.
I believe I have a new one in the garage and no longer have a car with a clutch.
Will PM you tomorrow.
The 1954 has a strap type pressure plate and has a greater torque capacity for the more powerful engine. Also the 1954 flywheel is different so as to accept the new pessure plate.
Last edited by Chev Nut; 02/28/16 06:41 PM.
Gene Schneider
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Both the clutches I removed have diaphragm type pressure plates. I do have two NORS relined disc so I only need the pressure plate. Can I use the flywheel from the 54 and then the later pressure plate?
Last edited by m006840; 02/28/16 07:38 PM.
Steve D
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The 1954 pressure plate was also a diaphragm type but .... will send pictures later.
Gene Schneider
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I just checked the flywheels and the ring gears and mounting are the same so as far as I can tell it should work fine. Using a higher torque capacity clutch would be good. Possibly a 10" disc?
Steve D
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I just checked the flywheels and the ring gears and mounting are the same so as far as I can tell it should work fine. Using a higher torque capacity clutch would be good. Possibly a 10" disc? I have 2 216 flywheels. One has 6 holes for pressure plate, the other has 9 holes for the pressure plate. Thought the 9 hole was for the H.D. pressure plate. In the parts manual (November of 1957), I see one flywheel for the 1954.
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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The nine hole is what is listed as for heavy duty in my 55 book. I do not have a later book. There are however four different flywheels that use the same casting as the 54 (3705410).
Steve D
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The 9 bolt is for an 11" heavy duty car and big truck clutch.
I see no reason why a 1954 pressure plate AN flywheel could no be used in a 1953 and prior.
The 1954 flywheel is like a one year only and the timing marks may be in a slightly different location.
Gene Schneider
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Timing should be OK as the flywheel is from the 54 engine. I am still digging to try and verify the part number as the casting number does not match my parts book. It looks like 3704882 and that is not even in my book. It does have six PP mounting holes and the markings are the same as my book shows for the 839754 for 42-53.
Steve D
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One thing to watch for too is your starter. Will it mesh up with the 54 flywheel? I kept the 52 235 flywheel, bellhousing and clutch when I switched to a 54 motor so I could use my starter.
Last edited by styleline51; 03/01/16 07:00 AM.
Rick
"Never time to do it right the first time, but always time to do it over."
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The flywheel and ring gears match, same diameter and # of teeth.
Steve D
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