The Stovebolt Site Forums The Shop Area Driveline clutch throw-out bearing - different sizes??

Are there two different sizes (length) of clutch throw-out bearings used on the 1947-1955 1st series trucks? Wondering if I missed something. Thanks

1950 Chevy 3100 truck

Curtis Lee, Your question will get better answers in the Driveline forum, so it’s been moved there for further help and conversation.

There were a couple of different lengths depending on which pressure plate & clutch plate combination your truck used. You can tell which one you need by measuring your original to bearing.

These are the most common versions. If the pressure plate has FLAT FINGERS then it would use the taller of the two pictured. The shorter version is designed for pressure plates with fingers that tilt away from the flywheel.

Which one / typ is the best solution? I´ve got the short throw out bearing version...arround 2600km and it becomes noisy so I have to change it. I´am still on the project this week and orderd the " long throw-out bearing with the flat fingered pressure plate.
(292cui I6 engine with SM420)

Hello Sven,
Neither is better than the other. It all depends on how much space is between your pressure plate and your clutch fork. Some pressure plates are designed differently and because of that they will be thinner. Those will usually need the longer throw-out bearing. I hope this helps.

Thank you Jon for your statement.

I will see this the next days. Receive the new cluctch kit yesterday. I ordered this part because it was named " Heavy Duty" (Rockauto Part MU54731B/ Perfection Clutch). If anyone is interested I can take some pictures of both completed versions

What I´am interested is from which year they used clutch fork with / without leaf spring clip.

Just to complete the versions of throw out bearings:

>> there are fixed and self-aligning parts

Sven, I can not remember which of the forks used no clips. Sorry. Mine is a 1952 and it used a clip.

Just to complete the topic because I worked on it last week, here is the combination of throw out bearings with clutch pressure plates.

For me the flat pressure plate with higher throw out bearing will be the best solution because of a better clutch pedal feeling during driving the truck.

Thanks for letting us know, Sven.

A lot depends on what engine you have. The flat fingers with the long TO brg is not good for high RPM. It was usually listed for 6 cyl. engines. The extended fingers came out with the V-8 engines.

George