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#39563 04/25/2002 3:18 PM | Joined: Mar 2002 Posts: 126 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2002 Posts: 126 | Just pulled a brake wheel cylinder off the front passenger side of my 42 3/4 pickup and purchased a 1 1/4 rebuild kit for it when I noticed that the cylinder was a 1 3/16 bore. According to the shop manual this 1 3/16 bore cylinder should be on the rear. Will this matter? What is the reason for the different size cylinders front and rear? Can I continue to use this smaller cylinder on the front? Thanks in advance.
Chris
Chris Simmonds
1942 Chevy 3/4 ton
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#39564 04/25/2002 6:02 PM | Joined: Jan 2002 Posts: 398 Member | | Member Joined: Jan 2002 Posts: 398 | Chris42pu-Yes, it does make a difference. The front brakes on most vehicles handle the majority of the braking load, usually 70-90%  . This is why the larger cylinders need to be on the front. Best of luck with your project. Wannabe 
"Don't expect anything and you'll never be disappointed"
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#39565 04/29/2002 12:53 AM | Joined: Feb 2002 Posts: 21 Member | | Member Joined: Feb 2002 Posts: 21 | Chris I agree with Wannabe. If you play around with the wrong cylinder in the wrong place you could get brake lock-up on the wheel with the odd cylinder. In an emergency braking sit. you could find yourself doing a smart 90 degree turn to where you don't want to go. OLD 42 :mad:  | | |
#39566 04/29/2002 1:23 AM | Joined: Mar 2002 Posts: 126 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2002 Posts: 126 | Well I discovered that whoever rebuilt the wheel cylinders in the past put the 3/16 on the front and the 1/4's on the rear. Thay did it backwards. I will put them in their proper places after I rebuild them again. Thanks for your help.
Chris Simmonds
1942 Chevy 3/4 ton
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#39567 05/06/2002 6:35 PM | Joined: Jan 2001 Posts: 30 Member | | Member Joined: Jan 2001 Posts: 30 | At one time I had the same on all four wheels. Didn't seem to make much of a difference and simplified matters. | | |
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