The Stovebolt Site Forums The Shop Area Driveline 1936-46 Chevy 1/2 T Brake, MC, and pedal shaft bracket

I am looking for a couple of images of GM 477083 (the brake, main cylinder, and pedal shaft bracket) that fits 1936-46 Chevy 1/2 ton trucks with the 4 speed transmission. I have a 216 engine.

Thanks Glen

Glen here's a picture from Utah John's '46 1/2 ton DITY Gallery showing the overall setup.

If you need more detailed pictures, I'm sure John would be able to help you out if you can provide him more specifics on the level of detail you are looking for.

I tried to fabricate a bracket to hold the return springs, but later found out I needed to install the engine side pan that holds the Z bracket for the brake return spring and wire extension. My setup now looks like this which I believe is stock. Same spring is used for the brake and clutch. Are there other pictures you need?

I think these pictures are good. My main concern was distance of my bracket to bolting to tranny. I got it from old car guys in Oregon and he says it was from a 4 speed and will work. It’s actually from the 3 speed tranny but is tweaked a little but looks like it will work. Just looking for confirmation as it all works as is and I hate to swap tranny and find out it doesn’t work!

Here's another pic.

Glen - Have you already removed the 3 speed and installed the 4 speed? Best guess after trying to compare side by side pics (near as I can get them to align) from you and John's provided pictures is it might bolt up.

The only way to get a more accurate answer is to try to mount it to the bell housing with the 4 speed installed and see how the mounting bolt holes line up.

Dan, I was looking at your picture and saw a bolt was missing on my bracket. Had to go in the garage and double check and it is there. 😉

Just “eye ball” measuring various comparable points in each photo Utah posted above, it appears one bracket is a bit larger? It seems most noticeable in comparing the area just to the left of the red arrow shown in his photo, with the corresponding area on the other bracket?
Maybe actually measuring comparable points and comparing notes. would help?

The 1946 Chevron Master Parts Catalog, page 222, Group 4.648 does list separate parts for 3 and 4 speed brackets. The brackets for each fit model years from ‘36 through’46, GC and DP models.

I replaced my four speed with a three speed on my 46 half-ton. I reused the four speed bracket but had to use approximately 3/4" spacers. With that in mind, I think the three speed bracket on a four speed would place the whole mechanism about 3/4" too far to the left. As you can see, I also made a bracket to replace the stock master cylinder. I am a little embarrassed that my workmanship isn't quite up to the level I'm seeing on this thread !

I'm seeing nothing to be embarrassed about in your pics. Good idea on the spacers.

Thanks guys,

John, you probably have your master cylinder on but if possible maybe you could measure from center of tranny case to center of master cylinder. Thanks

Bogart, mine has nubs ground off to fit a 4 speed but sounds like it is the same bracket any way. Only difference is the washers or the nubs.

Dan, I still have the 3 speed on my truck, but I am removing the floor board in the next few weeks but then I can measure my center of 3 speed tranny to center of the MC before I remove. Plus I can put my nonworking master cylinder on the “ new bracket “ and on the 4 speed and do that measurement also. Then if I need I can add a spacer but I’m thinking it is going to be good.

Lee, thanks for idea of getting measurements.

Thanks

May I ask why are you going with the 4 speed?

Yes🤠,

My 3 speed has a leaky case and I wonted the 4 speed just because. I happened to come across one so I going to try and swap it. I know it is not synchronized. If unhappy with it I can always swap it back if I find a good case for my 3 speed. No reasonable answer other than I want it.

That's the perfect answer!

I hooked the tape measure on that little fill plug fitting. Looks like it's about 7 1/4 inches.

Holding my bracket on with old master cylinder in place looks like I’m at 7 1/8. So maybe a spacer. I’ll measure my current system when I get floor out and double check that. I say it’s a go to remove the tranny.

Thanks all, Glen