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Somebody stop me!
Hey guys,
It's been a while since I've been on. My 71 4wd isn't stopping very well. I had to make an emergency stop the other day and I realized I couldn't even lock em up. Might I have a bad booster? Any ideas? Thanks in advance, Drew |
Re: Somebody stop me!
How must pressure do you have to apply in a normal stop?
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How much fade on the pedal?Right away,only when hit hard,after pressure applied for awhile?
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Re: Somebody stop me!
One very common upgrade is to swap to 3/4 ton master/booster.
What size tires are you running? |
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the best way to check a booster : with your truck off , apply pressure to the brake pedal , start the motor , if the pedal moves down , the booster is good.
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Re: Somebody stop me!
71-72 1/2 ton trucks and K5's brakes suck in my opinion. My GMC is the same way in panic situations, and for towing they are very underpowered and fade out easy. I have replaced everything in my braking system and have achieved nothing as far as better performing brakes. I will be getting a ¾ ton power brake booster for both my K1500 and my Blazer that is the way to go. If you noticed that GM addressed the problem with the 73 ½ ton’s and K5’s they went to a larger dual diaphragm power brake booster and wider brake shoes in the rear otherwise they are basically the same braking system but stop much better. The 67-70 ½ ton trucks used drum front brakes and the power brake booster was adequate for a 4 drum braking system but in 71 they changed to disc brakes and still used the old power brake booster and that is why they suck. When I drive my Dad’s 70 K20 I just about put myself through the windshield the first time I tap on the brakes, and that is what makes me realize how bad mine really are.
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Re: Somebody stop me!
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Scares me just reading it :eek: |
Re: Somebody stop me!
Luvy u havent mobbed yours around enuff to have any "emergency stop" situations, huh? ;)
or have you just gone out and gotten on the brakes as hard as possible to find out how yours stops? |
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Mine is 100% new parts, pads, rotors, drums, shoes, lines, m/c,
booster, ppv, fluid, everything and it doesn't stop very well :crazy: |
Re: Somebody stop me!
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Meybe yours only need a good bleeding? |
Re: Somebody stop me!
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Oooooops, I forgot, we gravity bled it, power bled it, bench bled the mc, and I still got squishy brakes, I think my 4wd needs the 3/4 ton upgrade |
Re: Somebody stop me!
I'm running 33's on a 4" lift. During normal driving situations it seems to be adequate. The pedal seems a little stiff. I've bled a couple of times thinking "this time I'll get it". So I don't think that's the problem. I just want to make sure that, before I upgrade, there isn't anything else I could do.
And speaking of upgrade; has anyone done a rear disc conversion kit with e-brake that they'd be willing to recommend? Thanks for the input. Drew |
Re: Somebody stop me!
mines exactly the same, i got new everything also. looking into doing a 3/4ton system now its scary driving on the freeway when everyone stop's and your left hoping your truck stops..
-Cameron |
Re: Somebody stop me!
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High Angle sells a drive shaft e-brake set up. http://highangledriveline.com/ http://highangledriveline.com/Copy_of_Picture_153.jpg |
Re: Somebody stop me!
Similar crappy braking with my blazer. Just swapped to a 3/4 ton booster--same problem. The only thing I haven't replaced is the calipers which will be next. Given that 70-80% of the braking comes from the front and I can lock up the right rear, I'm hoping this is the problem. What a PITA though!!
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im gonna try steel braided lines and a correct brake job, somthing tells me the PO just slapped pads on a glazed over rotor.
-Cameron |
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Now that you mention it, my one ton has those as well. |
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yea i figured it would be a good mod regardless if i stayed with 1/2 ton brakes or went to a 3/4 ton setup. never know, they just might fix the problem.
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ya must be nice. im not messing around. im getting the hydrobust setup from a 73 style one ton. that will solve my breaking problems. my dads 83 one ton stops better than most new trucks.
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Re: Somebody stop me!
Just curious.......does the 3/4 ton setup just bolt on to the Blazer? Sounds like a no brainer if it does.
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