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EFV-8 Club Forum / General Ford Discussion / clutch pedal throw

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Discussion Topic: clutch pedal throw

MICHV8

08-10-2024 @ 4:32 PM

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I’m having a problem with my 1932 clutch pedal throw and wonder if it is the combination of the new 29A-7550 clutch disc and the existing 59 AB pressure plate. The 32 came with a 59AB and the existing pressure plate. The transmission was an original 1932 transmission that kept slipping out of second gear. I don’t know much about the 59AB pressure plate, but when I pulled the engine, I noticed that the pressure plate seemed to have adjustable fingers. The pedal throw with the original clutch disc and the 32 transmission was fine… the clutch pedal released to about the same height as the brake pedal (original mechanical brakes) and released the clutch a few inches above the floorboard. I replaced the original 32 trans with a 78-7006 case and updated gear set. I used the original 1932 clutch shaft in the 78-7006 case just to avoid any linkage issues. However, now I am unable to adjust the clutch linkage to obtain the same clutch pedal height while still operating the clutch…the clutch pedal hits the floor before releasing the clutch or is way too high. I’ve adjusted the clutch fork linkage back and forth, but either the clutch pedal is way too high or the pedal bottoms out before dis-engaging the clutch disc. I know this is long winded, but I am looking for any hints…thanks!

40 Coupe

08-11-2024 @ 5:19 AM

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Are you using the tall 32 clutch arm on the side of the transmission, see photo below? Are the 32 pedal bumpers in place.? Is the 32 clutch pedal return spring in place? Use the 32 clutch adjustment link between the pedal and the clutch arm on the side of the transmission.

MICHV8

08-11-2024 @ 9:21 AM

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yes...original clutch shaft and arm
following is a better re-write of the problem...

When I purchased the 32 5W it had a 59AB and the original 1932 transmission which would not stay in second gear. I replaced the 32 transmission with a 78-7006 case and an updated gearset. I also installed a new 29-7550 clutch disc with the existing pressure plate. The transmission worked fine on a bench test so I jacked the rear tires about 2 inches off the floor on jack stands for in car testing. I can start the car in all individual gears and the trans seems fine, but I can’t shift gears. The original 7532 clevis location on the 7521 clutch adjusting rod does not work. It allows the pedal to retract way too far past the brake pedal and bottoms out on the floor before releasing the clutch . I had decided to use the original 1932 B-7510 release shaft and 7515 release fork to avoid these linkage issues, but obviously something is wrong. I have tried moving the clevis both ways on the adjusting rod, but to no avail. After much viewing and thinking, it seems I might need to shorten the adjusting rod, but don’t understand why the original setup does not work as intended. Any ideas? Thanks for your time.

3w2

08-11-2024 @ 5:17 PM

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Did you measure the relationship between the clutch pressure plate and your new clutch disc before installing the transmission? It sounds like perhaps you did not. It is easily done before installing the transmission and thirdgenauto.com offers a simple gauge for the job.

All the experimenting with different release arms and pedal to arm rods will not correct an improper clutch engagement/disengagement problem. (I learned that the hard way.)

MICHV8

08-12-2024 @ 5:36 AM

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Nope! Who'd have thunk it? And I assume there is no way with the clutch inspection window bearing fruit so I'm going to try to find a longer fork clevis before facing the inevitable task of pulling the 59AB again which was a very difficult install due to the front cross member. This time the crank pulley is coming off!
Thanks for the info!

40cpe

08-12-2024 @ 10:58 AM

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A shorter clutch arm will allow for more movement of the throw out bearing with the same pedal movement. It will also increase the force necessary to push the pedal. This MIGHT allow you to gain some free play in the pedal. I suspect your clutch disk is too thick.

MICHV8

08-12-2024 @ 11:47 AM

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Thanks folks. The oil pan is a two piece...will that allow me to remove the pressure plate?
I'll answer my own question...I'll need to pull the engine as the 1932 trans has to come out the front, so I won't be able to move the trans backward to remove the pressure plate. And I'm guessing that I can't adjust the pressure plate with it bolted on the flywheel?

This message was edited by MICHV8 on 8-12-24 @ 4:04 PM

3w2

08-12-2024 @ 5:08 PM

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In a '32 chassis, there's only one way to access the clutch and that's to pull the engine and transmission.

MICHV8

08-13-2024 @ 5:38 AM

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DR...
I'm removing the crankshaft pulley from the 59 AB and the water pumps have been off from the first engine removal (which was difficult due to the pulley).
Even with the pulley removed, it looks to be a very tight fit and I'm assuming that I will need to tilt the engine with the trans rear bearing retainer bolts removed in order to slide the trans input shaft into the pilot bearing...yes?
Thanks

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