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Old 11-25-2019, 03:07 PM   #1
Gigem
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Help! What's the deal with this brake booster on my 72 GMC?

Ordered a new brake booster for my 72 GMC 1/2 ton. See pictures attached. Bolt pattern on the old one looks to be 4", and the new one is 3 3/8". I don't see any options for different boosters to buy. Any idea why my old one has a different pattern? Thanks!
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Old 11-25-2019, 04:01 PM   #2
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Re: Help! What's the deal with this brake booster on my 72 GMC?

bracket
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Old 11-25-2019, 04:03 PM   #3
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Re: Help! What's the deal with this brake booster on my 72 GMC?

I'm hoping that for some reason I have the wrong brackets. No idea what this booster is from if that's the case. Just ordered this from Jegs.

https://www.jegs.com/i/JEGS/555/631022/10002/-1
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Old 11-25-2019, 04:03 PM   #4
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Re: Help! What's the deal with this brake booster on my 72 GMC?

Your new one is a China repop that requires the repop bracket also
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Old 11-25-2019, 04:22 PM   #5
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Re: Help! What's the deal with this brake booster on my 72 GMC?

Quote:
Originally Posted by mgchevyparts View Post
Your new one is a China repop that requires the repop bracket also
Crazy. Surprised I don't see any threads complaining about this. Or maybe nobody buys these crappy boosters from LMC like I did...

Hopefully the bracket I got from Jegs will fix the problem.
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Old 11-25-2019, 04:55 PM   #6
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Re: Help! What's the deal with this brake booster on my 72 GMC?

You better cancel those brackets. They're for a 67-72 Chevelle
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Old 11-25-2019, 04:56 PM   #7
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Re: Help! What's the deal with this brake booster on my 72 GMC?

Quote:
Originally Posted by Gigem View Post
Crazy. Surprised I don't see any threads complaining about this. Or maybe nobody buys these crappy boosters from LMC like I did...

Hopefully the bracket I got from Jegs will fix the problem.
Most people buy the booster with the truck bracket as a set.
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Old 11-25-2019, 04:59 PM   #8
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Re: Help! What's the deal with this brake booster on my 72 GMC?

This one on Ebay: https://www.ebay.com/itm/1967-1972-C...IAAOSwOTNZ1V-4
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Old 11-25-2019, 05:25 PM   #9
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Re: Help! What's the deal with this brake booster on my 72 GMC?

Quote:
Originally Posted by mgchevyparts View Post
Thanks!
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Old 11-25-2019, 06:20 PM   #10
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Re: Help! What's the deal with this brake booster on my 72 GMC?

Get ahold of Frank (pickmup) in Washington State. He builds power brake boosters that are better than factory.
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Old 11-25-2019, 09:08 PM   #11
Mike C
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Re: Help! What's the deal with this brake booster on my 72 GMC?

I found that out the hard way as well. I could not find a rebuilt booster so I bought the whole kit and tried to use new booster on oem brackets and they were different sized. I used all the conversion setup except the pushrod because the original one looked WAY more heavy duty.
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Old 11-26-2019, 06:44 PM   #12
Gigem
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Re: Help! What's the deal with this brake booster on my 72 GMC?

Screw it. Ordered a reman unit from O'Reilly. Should be here tomorrow. Won't look as good as a new one, but should bolt on. Hope I can return the Chinese one to LMC without too much trouble....
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