The Stovebolt Site Forums The Shop Area Engine Shop 1938 brake pedal and mount area

As with a lot of vehicles someone chopped out the under floor pedal system and did some unsafe creative mods. under the dash Does anyone have a measurement for the correct location or can tell me what or where to look for in case there are some remnants of the old hook up?

The floor pedals were originally attached to the clutch housing, the parking brake bolted to the tranny.I have a 37 pu and a 46 big truck. The pedal assembly looks the same more or less on both. The bigger trucks use a clevis and bell crank from the pedal to the master cylinder.My 37 has the parts modified from a big truck so I cannot say for sure what the smaller trucks use.A guy here had good photos of mounting the pedals to a bracket on the frame if you are using a different clutch housing .Having fun yet?

'37-'46 1/2-ton pedal assembly bolted to the tranny and bellhousing. Pushrod pushes directly on the master cyl. Similar, but different bracket from the 3-spd. to the 4-spd. Since the 3-spd. is a smaller tranny, the mounting bosses on the pedal bracket extend in farther. 3/4-ton and bigger trucks have a different pedal assembly that was hung off the frame rail and used a bell crank to push on the master cyl. pushrod.

Barry the pedals on my 46 2 ton are directly bolted to the bellhousing. No frame bracket.The master is mounted on a frame bracket with a bellcrank and rod to the pedal. The pedals in 37 pu were taken right off a 37 1-1/2 ton truck. It has what looks like the exact same arrangement as the 46 truck.I installed the 37 1-1/2 ton set up in the pick up as is worked well with the different master cylinder I used Are we saying the same thing ?

Get Jim Proffit to email you a pic of his pedals. Even though he changed the trans, the pedals are bolted to the bellhousing and trans in the right place. If that is not enough I can try to find old pic of what my 46 looked like before change.

Tony- I know what you are describing; I think Barry may be referring to the m/c which is on the frame bracket on the larger trucks, but your pedals should be in same location as 1/2 ton even though the brake rod doesn't go directly into the m/c like on 1/2 ton.

Barry

Unless you have a GMC they come with the bigger trans in the 1/2 ton version
Never seen a GMC with the little one

Yep, sorry, I wasn't very clear with that answer. I'll try and explain it better. The 1/2-tons use a frame that gets wider as it goes towards the back. The 3/4 and bigger trucks use rails that run parallel to each other (roughly 36" apart)to make mounting different bodies easier. The 1/2-ton pedal mounting bracket is different from the bigger trucks. 1/2-tons use a cast bracket that bolts to the bellhousing with 3 bolts and the tranny with 2 more bolts. The master bolts right to this bracket. The clutch and brake pedals both pivot off this bracket, but from seperate shafts. The 2 tranny bolt bosses on the 3 spd. bracket extend in farther than on the 4-spd. bracket since the 4-spd. is a larger tranny. The 3/4 and larger trucks have a common shaft for both pedals, and don't use the 1/2-ton bracket. There is one hole in the end of the shaft and a small bracket with 2 more holes to bolt into the bellhousing. These pedals are different from 1/2-ton pedals. Both pedals are bent different from the 1/2-tonners and the brake pedal has ears for the m/c pull-rod that runs to the master bell crank. Clutch pedal still has a hook on the bottom on both. The big truck master bolts to a bracket mounted to the frame.(remember these frame rails are straight, so all the linkage runs parallel to the rails) The 1/2-ton master hangs from the same bracket the pedals are on and doesn't use the bellcrank and linkage, just a pushrod.

Unless you have a GMC

Thanks for all of the information. Since I didn't get the original motor or transmission with Panel I will have to resort to plan B. I know I can buy an after market under the floor system that takes into account the narrowing rails.