Dual Diaphram Brake Booster

[HellCreek]

Can someone tell me what dual diaphram brake booster and master cylinder combination would be a direct, bolt-on replacement for the single diaphram booster/master cyl. in my 1989 Sport Truck with a 2.5L engine and standard 4 speed tranny?

 

Thanks,

Tom

[dasbulliwagen]

I'm not sure that there are any that are direct bolt on with no modifications. With minor mods a late model Cherokee system, or a WJ Grand Cherokee 99-04 boosters have been made to work. I even heard a while back that Crown Auto was working on a kit with the WJ booster to bolt into early Cherokees and MJ's, but I have heard nothing about it lately. The mods have been documented here and you should be able to find something with a search. Good Luck.

 

... Oh yeah.. JP magazine did the WJ swap in the october 08 issue. I Have that in the plans for myself as well.

[HOrnbrod]

Tom;

 

The four and six cylinder gas engines used the same booster/master. The only thing different is the vacuum hose. So the 95-96 dual diaphram booster/master combo from an XJ will work for you as it did for me. :cheers:

[HellCreek]

Thanks :thumbsup: That's all I need to know. :D

[cmelo]

I did the swap with a WJ booster and master cylinder.

 

Used these links:

http://www.naxja.org/forum/showthread.php?t=903934

http://www.naxja.org/forum/showthread.php?t=924285

 

Very straight forward

[HOrnbrod]

Thanks :thumbsup: That's all I need to know. :D

 

Forgot: Be sure to grab the 1/4" booster to firewall alum spacer plate from the donor vehicle - keeps the booster off the firewall seam and depending if you have the auto or manual shift will allow you to use your original pedal assembly. :cheers:

[cherokee]

The washer bottle needs to be moved forward a bit too. Or at least I had to move mine forward about a 1/4" when I did this swap.

[HOrnbrod]

Or install the 1997+ bottle inside the fender well like I did. :thumbsup: