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Unread 06-27-2012, 11:02 AM   #1
Alex77cj7
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1977 CJ7 
 
Join Date: Jun 2012
Location: Lafayette, Louisiana
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Manual brake to power brake conversion questions

I'm wanting to install power brakes on my 77 cj7 but I am not sure what all I'd need to buy and change to install it. Would i be able to just buy the brake booster at a parts store and just install that with my stock line an master cylinder or would I have to change all that too? I'm also thinking about swapping my front drums to discs from a jeep of the same year. Would I be able to just go to a parts store and buy calipers and discs and install that? I'm really confused and need help so any little bit would be greatly appreciated!

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Unread 06-27-2012, 11:26 AM   #2
Dadamsnv
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I also have a 77 CJ, but mine's a 5. So far the best manual to power brake conversion I have seen and will be doing in the next few weeks uses a yj master cylinder and booster in place of the CJ master. Apparantly the best year for a donor is 95 for some upgrade reason. Luckily there is a good one in town for me, the guy wants $100 for the full assembly, but i think I can get $80. The only modding necessary to make it fit is you have either lengthen or shorten the booster input linkage a bit.

Use the search bar at the top of the site, that's how I found out about all this. good luck!
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Unread 06-27-2012, 11:40 AM   #3
jpd1899
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1978 CJ7 
 
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To go with power brakes you may also need a new proportion valve to re-adjust the flow to the brakes. Depending on your donor parts, they may require new lines to/from the valve to cylinder.

A front disc brake conversion, requires a lot more than just calipers pads and cylinder. I don't have much time on my lunchbreak to find you a few articles to point you in the right direction. but here is one
http://www.jeepforum.com/forum/f8/di...-i-use-943611/

In short you need to replace everything from the nuckles out to make it work.

There is alot of info on the forum about this specific topic. If you are having a hard time finding it through the forum search, try using google and included jeepforum (one word) in the search
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Unread 06-27-2012, 12:27 PM   #4
Alex77cj7
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Thanks for the help! At least you were able to get me going in the right direction! But if I go to a parts store and get the booster and master cylinder for a 77 with power brakes would it just bolt up?
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Unread 06-27-2012, 12:34 PM   #5
Alex77cj7
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I'd rather start with brand new parts.
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Unread 06-27-2012, 04:33 PM   #6
oteps
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There is a bracket between the M/C and the firewall. Your old m/c just bolts right to the firewall. I used a 89 xj booster and m/c but I had to make a braket and a new rod. I dont know anything about the disc brake swap.
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Unread 06-27-2012, 04:41 PM   #7
Alex77cj7
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Would I be able to use stock brake lines?
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Unread 06-27-2012, 04:41 PM   #8
RobsCrawlin7
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i have a booster and mc that I just took out of mine when i put in hydroboost brakes, they worked great until i threw some 37's on it lol

if you are interested ill sell it to ya cheap.

if not then i cant say enough with VANCO brakes, they are absolutely amazing.
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'01 TJ 4.7/NV3550, 2" lift, 35's, locked.
'79 CJ7 stock, 304
'98 XJ sold
'79 CJ7 sold
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'89 MJ sold

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