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Old 09-14-2014, 08:49 PM
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Default 40 Brake Booster hisss

Well, the 40 is Alive! From front discs/power steering to 5.7l TBI to new interior and paint...it came out pretty awesome, if I do say so myself. I am one front driveshaft away from being complete.
But, now I have a hiss from the brake booster when I apply the brakes. I'm sure it's got more vac than the old F engine had and I have discs on the front now.
Any suggestions on a cure? Rebuild kits are few and far between as are new boosters. Maybe I need to reduce the vac from the engine? Maybe another model booster is a replacement?
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Old 09-14-2014, 11:48 PM
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Dam nice looking!!
Both of them trucks..

Not much help on the hiss..
Got the same thing..afaik rebuild or replace is only options.

There's a good thread on mud where vae victus went nuts looking for suitable and equivalent aftermarket replacement booster for 40s and found one

He found iirc an almost identical aftermarket one that worked

Edit: heres that thread I was talking about
http://forum.ih8mud.com/threads/1976...t-list.731418/

From your picture that aint a 76 to 80 like the link above references... but with disc swap on front maybe its what you want anyway..not sure
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Old 09-15-2014, 07:20 AM
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Would just buy a booster for another vehicle. Research fj60, Minitruck, gro metro boosters. I put an fj60 on mine and am happy
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Old 09-15-2014, 03:08 PM
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I replaced mine with a booster from a 60 as well. Just be sure to take the back-flow valve with the new booster if grabbing one from a yard.
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Old 09-15-2014, 04:03 PM
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I put a booster from an 80 on mine. Direct swap, no mods.... (Mount it upside down)
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Old 09-15-2014, 10:38 PM
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Ok, I will look for a 60 or 80 booster. Thanks guys!
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Old 09-15-2014, 11:42 PM
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I went to "power brake of Denver" got a rebuilt booster for my 40. Swapped it out with no problems. It's a small operation but he knows his stuff. IMO you can skip parts yards and get something that's been rebuilt.
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Old 09-16-2014, 01:49 PM
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I'm running a mini truck booster on mine. Pretty easy swap. I may even have an extra sitting in the garage.
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Old 09-16-2014, 02:45 PM
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This thread needs more pics.
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Old 09-16-2014, 04:13 PM
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Quote:
Originally Posted by subzali View Post
This thread needs more pics.
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aka Mike D.----->Bio Page KDøGWY
“He who goes unarmed in paradise had better be sure that that is where he is.”—James Thurber
"Its better to be thought a fool rather than to speak up and remove all doubt." - Lincoln
pride is ego, the word I had lost was dignity. The quality or state of being worthy of esteem or respect.
Ptarmigan build thread - 95FZJ80
www.root45.com
www.risingsun4x4club.org

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