yj brake booster swap? - JeepForum.com

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post #1 of 29 Old 02-03-2010, 03:53 PM Thread Starter
gotCLAY
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yj brake booster swap?

Dose it matter if it is a 4cyl or 6cyl for the brake booster and master cylinder swap?


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post #2 of 29 Old 02-03-2010, 03:59 PM
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Wouldn't think so..

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post #3 of 29 Old 02-04-2010, 12:42 PM
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You want the 1995 dual-diaphragm setup. Make sure you get the firewall bracket - that is the only part you can't go buy new at the store. I don't know if the motor makes a difference.

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post #4 of 29 Old 02-04-2010, 01:14 PM
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Motor should not matter as it isn't tied to the motor.... (besides vaccum lines) Someone correct me if I'm wrong..

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post #5 of 29 Old 02-04-2010, 02:01 PM
jumbojeepman
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Quote:
Originally Posted by PavementPounder View Post
You want the 1995 dual-diaphragm setup. Make sure you get the firewall bracket - that is the only part you can't go buy new at the store. I don't know if the motor makes a difference.
]

Does the firewall bracket have to be from a 1995, or can you use any YJ bracket with a 1995 brake booster?
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post #6 of 29 Old 02-04-2010, 02:55 PM
scottymac62
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Quote:
Originally Posted by jumbojeepman View Post
]

Does the firewall bracket have to be from a 1995, or can you use any YJ bracket with a 1995 brake booster?

Any year YJ firewall bracket will bolt up to a 95 booster. And that will bolt up to your CJ with no problem.

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post #7 of 29 Old 02-11-2010, 12:30 PM
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Will YJ booster interfere with support rod?

Will the brake booster hit the support rod that comes from the front bib/grill area to the firewall?
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post #8 of 29 Old 02-11-2010, 01:20 PM
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No, they are pretty compact boosters, not the big ones you might be used to seeing. Davey's Jeeps had one for sale a little while back with a good pic, but last time I looked it was gone. Do a search for 95 booster and you're bound to find a pic in one of the threads. You do have to worry about the air cleaner though, there was one for non-power breaks and the pacer style for power brake equipped jeeps that shifted the air cleaner more towards the center of the engine bay.
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post #9 of 29 Old 02-17-2010, 05:14 PM Thread Starter
gotCLAY
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So Im not 100% on this but at three auto parts store the 4cyl and the 6cyl for a 95 have two different part numbers so I would think that there must be something different.

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post #10 of 29 Old 02-17-2010, 05:32 PM
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I have a 77 CJ5 w/ manual brakes and 4wheel disc brakes. It stops fine but I can't lock them up if I had to- I have 35's. I just bought a 90' YJ MC/booster from a salvage yard and bolted it up yesterday. I know it is a single diaphragm but I'm sure power vs manual will be much better, single or dual. Don't get me wrong, I would have gone dual but couldn't find a 95 at the salvage yards.

It was a straight bolt-on, the 4 bolts were already in the firewall-they serve to support the plate on the inside of the firewall that holds the brake and clutch pedal assembly. It does not get in the way with the support rod or the clutch master cylinder (Novak conversion).

The rod fit perfect on the stud on the brake pedal, no need to use a bushing and, it is only about a 1/4" shorter than the original manual MC brake clevis/rod. I'm hoping I don't need to pull it out and cut,thread to adjust it out.

I run a wilwood (from Summit-about $38.00) adjustable proportioning valve in line for the rear brakes, the fronts go straight to the MC - I completely removed the stock proportioning valve long ago and have been using the wilwood valve-works great. I had the same set-up on my 72 FJ40 w/4 wheel disc and I wouldn't do it any other way.
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post #11 of 29 Old 02-17-2010, 06:45 PM
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I just want to add, that while the dual diaphragm booster does work better, I have the single diaphragm booster and can lock up 35s if I had to, and I have. The single booster is a large improvement over stock if that all you can find.

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post #12 of 29 Old 02-17-2010, 07:06 PM
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I have a 1995 YJ Dual Diaphragm booster/ MC setup for sale, if anyone's interested...





I haven't listed this anywhere, but it seemed to be appropiate for this thread. If it doesn't belong here, mods, please feel free to move it.

Rich

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post #13 of 29 Old 02-17-2010, 07:23 PM
ElZorro
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Quote:
Originally Posted by rixcj View Post
I have a 1995 YJ Dual Diaphragm booster/ MC setup for sale, if anyone's interested...





I haven't listed this anywhere, but it seemed to be appropiate for this thread. If it doesn't belong here, mods, please feel free to move it.

Rich
Interested, PM Sent.
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post #14 of 29 Old 02-17-2010, 08:56 PM
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Quote:
Originally Posted by gotCLAY View Post
So Im not 100% on this but at three auto parts store the 4cyl and the 6cyl for a 95 have two different part numbers so I would think that there must be something different.
Napaonline.com shows 2 part numbers for 1995, but they also show pictures. There is a single and a dual. The single is probably the 4-cyl application.

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post #15 of 29 Old 02-17-2010, 08:58 PM
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YJ Brake Booster Upgrade

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