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Discussion Starter · #1 ·
Need to try and improve the braking power on an 88 Jeep Commanche. Already has braided steel lines but the pedal/master cylinder still seems to bottom out under hard braking.
Truck has 265/70-17's (approx 31") and will not lock the wheels even in the rain! Would like more overall braking power and would like to try some "high friction" pads. Anyone have any thoughts. How about the brake proportioning valve at the rear. Can this be diabled like on Toyota's?

Thanks,
Jason
 

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I would think that the pads are the least of your worries. If your braking is that bad look to other problems first. Improperly adjusted drums, stuck calipers, bad hydro-vac, bad master cyl, air in lines, etc...

Pads will not make a pedal stop bottoming out. What is occuring is that when you press hard either air is compressing or a seal is slowly leaking. You only notice it when the brakes are applied hard.

HTH
 

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Could be your rear brakes are so far out of adjustment or non-existent!! Pull your drums and adjust the shoes to drums, this will give you slightly better pedal travel. While your there might as well bleed them at the same time.
 

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Discussion Starter · #4 ·
Truck has new pads and shoes, been bleed etc by a shop here in San Jose (they mainly do high performance work on exotic cars--BMW's,
Ferrari sp? etc) so I'd think they know what they are doing. Brakes only 10% better but still lousy. I posted a month back here about "Commanche with weak brakes" and got a bunch of replys saying the same thing. One guy had two of these trucks and both of his had lousy brakes. Funny thing is the guy my
boss bought this truck from also had another Comanche but it has been totaled--reason being he rearended someone because of the weak brakes! Thanks for the tips--I'll double check the shops work if necessary. Still looking for pad tips. I know I have seen braking differences between different brands or grades of pads so I would like somemore opinions.

Thanks,
Jason <IMG SRC="smilies/smile.gif" border="0">
 

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XJ/MJs are prone to weak brakes. A lot of it has to do with they tend to not adjust well at all. My XJ would lock up all four tires with 31's on it and my MJ would screech the stockers on dry pavement.

I used to have to adjust the brakes manually on it ans I had a problem with the booster on the MJ. The brakes are marginal at best but with 31's and stock brakes you should get a screech on dry pavement still.
 
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