new4x4r Posted July 8, 2013 Share Posted July 8, 2013 Hey dudes, Anyone ever used a Chevy MC to get better braking in the rear? Link to comment Share on other sites More sharing options...
MY1PATH Posted July 9, 2013 Share Posted July 9, 2013 I think somone on N4W did. Its been a looooong time since I saw that thread tho. Link to comment Share on other sites More sharing options...
new4x4r Posted July 9, 2013 Author Share Posted July 9, 2013 The reason I ask, I did hte swap yesterday and have no pressure in any of my lines when I depress the pedal. Not sure ifI'm missing something or what Link to comment Share on other sites More sharing options...
MY1PATH Posted July 9, 2013 Share Posted July 9, 2013 Did you try bleeding again? There might still be some air in there. Link to comment Share on other sites More sharing options...
new4x4r Posted July 9, 2013 Author Share Posted July 9, 2013 I didn't bench bleed the MC I think thats my problem. I'll let ya know when I get home from work Link to comment Share on other sites More sharing options...
new4x4r Posted July 9, 2013 Author Share Posted July 9, 2013 I didn't bench bleed the MC I think thats my problem. I'll let ya know when I get home from work Link to comment Share on other sites More sharing options...
new4x4r Posted July 11, 2013 Author Share Posted July 11, 2013 Bled the MC to no avail. Tried to bleed the lines... Still nothing. Bypassed the abs block dealy and BAM more brakes then I know what to do with! 1 Link to comment Share on other sites More sharing options...
Kingman Posted July 11, 2013 Share Posted July 11, 2013 What year and model master cylinder did you use? Link to comment Share on other sites More sharing options...
new4x4r Posted July 11, 2013 Author Share Posted July 11, 2013 1979 blazer Link to comment Share on other sites More sharing options...
Kingman Posted July 11, 2013 Share Posted July 11, 2013 Do you have the link to the write up or did you wing it? Thought about doing it a while back but didn't have a need to. Now that my MC is bad and I see the GM ones are way cheaper it seems like a good time. Link to comment Share on other sites More sharing options...
new4x4r Posted July 11, 2013 Author Share Posted July 11, 2013 No. I just googled the MC people use for the upgrade and gave it hell. I'm not sure what I've done is 100% yet. If it is I'll do a wee write up. Link to comment Share on other sites More sharing options...
Kingman Posted July 11, 2013 Share Posted July 11, 2013 I assume at least new hard lines with standard fittings and some work to the brake booster and linkage? Link to comment Share on other sites More sharing options...
new4x4r Posted July 11, 2013 Author Share Posted July 11, 2013 Well so far I cut the little bullet nub off the brake booster shaft adjustment screw. Shimmed the MC out a bit, machined the holes a bit to get them to fit the studs, removed material off the mounting ears themselves, BLED THE MC, found adapters to go from 1/2"-10mm, bypassed the abs block and bled the entire system Link to comment Share on other sites More sharing options...
MY1PATH Posted July 11, 2013 Share Posted July 11, 2013 You have to bleed the ABS before you bleed the rear wheels. Link to comment Share on other sites More sharing options...
new4x4r Posted July 11, 2013 Author Share Posted July 11, 2013 The abs is completely bypassed now. It hasn't worked since the second day I owned the vehicle. Keeping it simple Link to comment Share on other sites More sharing options...
new4x4r Posted July 15, 2013 Author Share Posted July 15, 2013 Ok so I finished it all up!!! and its A-f*cking-mazing!!!! I've never has this much braking power. I'll do a write up when I get back from K-beck Link to comment Share on other sites More sharing options...
MY1PATH Posted July 15, 2013 Share Posted July 15, 2013 Was this with rear disc?Was the chevy MC for rear disc? Link to comment Share on other sites More sharing options...
new4x4r Posted July 16, 2013 Author Share Posted July 16, 2013 Yeah I put an isuzu rodeo Dana 44 with the big mother disc brakes on it. I don't know if the 79-?? had disc brakes. It was just the one I found the most of when looking at the upgrade Link to comment Share on other sites More sharing options...
Kingman Posted July 16, 2013 Share Posted July 16, 2013 Most of the new GM trucks don't even have disk brakes in the rear. Link to comment Share on other sites More sharing options...
new4x4r Posted July 16, 2013 Author Share Posted July 16, 2013 sweet... Link to comment Share on other sites More sharing options...
APACHECHIEF13 Posted March 28, 2014 Share Posted March 28, 2014 good wright up lots of info people need to know Link to comment Share on other sites More sharing options...
V8path Posted June 18, 2015 Share Posted June 18, 2015 (edited) Well so far I cut the little bullet nub off the brake booster shaft adjustment screw. Shimmed the MC out a bit, machined the holes a bit to get them to fit the studs, removed material off the mounting ears themselves, BLED THE MC, found adapters to go from 1/2"-10mm, bypassed the abs block and bled the entire system Am thinking about doing this to my 88 Pathfinder. Any idea if the brake boosters between the 98 (that's your model year?) and an 88 are the same/interchangeable, or whether swapping in the Blazer (or other Chevy) booster is the way to go. Was thinking about the hydro boost off a Astro Van's is another option as well... Any feedback would be appreciated. Edited June 18, 2015 by V8path Link to comment Share on other sites More sharing options...
Kingman Posted June 18, 2015 Share Posted June 18, 2015 GM hydro boost sucks... that's all I have for input. 1 Link to comment Share on other sites More sharing options...
V8path Posted June 26, 2015 Share Posted June 26, 2015 GM hydro boost sucks... that's all I have for input. Sounds like you've had a very very bad experience? I was hoping for some details on other's experiences to see if this something worth doing. Think I've a leak in my booster, and with 35" tires and more than double the HP my 88 came with, I thinks it time for an upgrade. Anyone else have input? Link to comment Share on other sites More sharing options...
MY1PATH Posted June 26, 2015 Share Posted June 26, 2015 MC's are Marked! for Pathy and z32 etc... Some are valved for rear drum and others are valved for rear disc. Size code below. BM33 = 13/16 BM38 = 7/8 BM44 = 15/16 BM50 = 1" BM57 = 1 1/16 Both my trucks say BM50 but my 89 was originally a BM44. 1 Link to comment Share on other sites More sharing options...
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