4 speed swap parts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dragonball98312 · 04-18-2016, 12:15 AM

Hey there everyone. Ive been slowly gathering parts to convert my k5 over from an automatic. Havent had alot of luck finding the conversion parts needed locally. I did find a 73 c10 with a 3 on the tree. A few possible issues tho. Its a 6 cylinder and I have a v8. Also its got manual brakes and I have vacuum. Im pretty sure the v8 zbar is different? Anyone confirm that? Also does anyone know if the pedals from a manual brake truck can be swapped with a power brake truck? Thanks guys

Titomars · 04-18-2016, 02:22 AM

Quote:

Originally Posted by dragonball98312

Its a 6 cylinder and I have a v8. Also its got manual brakes and I have vacuum. Im pretty sure the v8 zbar is different? Anyone confirm that? Also does anyone know if the pedals from a manual brake truck can be swapped with a power brake truck? Thanks guys

The Z-bar is the same for all engines between 73 to 78. I did not look at later trucks but it should be the same to at least 81. pedals should swap too. But the parts manual shows a different part number for (JB1) manual brakes as opposed to the one for (JB3, JB5, JB6, JB7) various sized power brakes

dragonball98312 · 04-18-2016, 08:27 AM

Thank you. Im getting a good deal on all the parts so it's worth the risk if they end up being different

Titomars · 04-18-2016, 10:56 PM

Quote:

Originally Posted by dragonball98312

Thank you. Im getting a good deal on all the parts so it's worth the risk if they end up being different

Well here is a piece of info for you. When I was with GM I learned how GM engineering worked. They would change the part number for the smallest change. up to and including a change in material or manufacturing process. So even though the pedals carry 2 different part numbers they could interchange or worst case be alterable to fit. Personally I have never dealt with a square that had only JB1 brakes. I would bet the only difference is the push rod location is in a slightly different.

dragonball98312 · 04-19-2016, 01:29 PM

Perfect. Ill be pulling the parts this saturday. Cant wait to use my a833

**old Rusty C10** · 04-19-2016, 08:51 PM

there is a difference on the power brake and manual brake set up.. IIRC its something with the size of the holes one wont fit the other.. I ran into this problem trying to find the proper set up for my 74 stepside

barry1982 · 04-20-2016, 12:09 AM

A few years ago I converted my 82 1/2T 4 x4 700R4 to a "farmer 4-speed".
I got lucky and bought a roll over 81 4 x 4 with a 4-speed. Came in handy having ALL the parts right there. Was a BIG job. Installing the clutch/brake pedal setup was pain, and if I remember right, also had to use the transfer case shifter that came with the 4 speed truck. I also used the floor "hump plate" from the 4-speed truck.

04-18-2016, 12:15 AM	#1
dragonball98312 Registered User Join Date: Nov 2010 Location: Belfair, Wa Posts: 477	4 speed swap parts Hey there everyone. Ive been slowly gathering parts to convert my k5 over from an automatic. Havent had alot of luck finding the conversion parts needed locally. I did find a 73 c10 with a 3 on the tree. A few possible issues tho. Its a 6 cylinder and I have a v8. Also its got manual brakes and I have vacuum. Im pretty sure the v8 zbar is different? Anyone confirm that? Also does anyone know if the pedals from a manual brake truck can be swapped with a power brake truck? Thanks guys

04-18-2016, 08:27 AM	#3
dragonball98312 Registered User Join Date: Nov 2010 Location: Belfair, Wa Posts: 477	Re: 4 speed swap parts Thank you. Im getting a good deal on all the parts so it's worth the risk if they end up being different

04-19-2016, 01:29 PM	#5
dragonball98312 Registered User Join Date: Nov 2010 Location: Belfair, Wa Posts: 477	Re: 4 speed swap parts Perfect. Ill be pulling the parts this saturday. Cant wait to use my a833

04-19-2016, 08:51 PM	#6
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: 4 speed swap parts there is a difference on the power brake and manual brake set up.. IIRC its something with the size of the holes one wont fit the other.. I ran into this problem trying to find the proper set up for my 74 stepside __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

04-20-2016, 12:09 AM	#7
barry1982 Registered User Join Date: Oct 2015 Location: Waskatenau, Alberta Posts: 259	Re: 4 speed swap parts A few years ago I converted my 82 1/2T 4 x4 700R4 to a "farmer 4-speed". I got lucky and bought a roll over 81 4 x 4 with a 4-speed. Came in handy having ALL the parts right there. Was a BIG job. Installing the clutch/brake pedal setup was pain, and if I remember right, also had to use the transfer case shifter that came with the 4 speed truck. I also used the floor "hump plate" from the 4-speed truck.



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