1/2 ton versus 3/4 ton booster - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Conroe trucker · 10-06-2009, 09:40 PM

Guys I need some pictures.

I have a 1/2 ton master cylinder and booster as a core, but my 67 truck is 3/4 ton cab.

Questions are:

Is there a size difference between a 3/4 ton and 1/2 ton brake booster?
Is there a difference in the master cylinder?
Is there a difference in the linkage?
I know the 3/4 ton booster brace is different, but not sure how it mounts.
Does it mount the same?

Some pics will probabley clear this up fpr me.

Thanks,
Mike

ERASER5 · 10-06-2009, 11:16 PM

Yes, Yes, Don't know, Yes.
3/4 booster can go on a 1/2, but a 1/2 ton should not be put on a 3/4 ton.
The 1/2 ton and 3/4 swap front bowl/ rear bowl.
I doubt that the linkage is different, but I am not positive.
The mounting bolts are the same on every 67-72 no matter the size.
Any help?

**special-K** · 10-07-2009, 07:27 AM

Pedal to booster rods vary by boosters and should be properly matched.

10-06-2009, 09:40 PM	#1
Conroe trucker SWBs: 67 2x4, 67 4x4, 70 4x4 Join Date: Nov 2007 Location: Conroe, TX Posts: 483	1/2 ton versus 3/4 ton booster Guys I need some pictures. I have a 1/2 ton master cylinder and booster as a core, but my 67 truck is 3/4 ton cab. Questions are: Is there a size difference between a 3/4 ton and 1/2 ton brake booster? Is there a difference in the master cylinder? Is there a difference in the linkage? I know the 3/4 ton booster brace is different, but not sure how it mounts. Does it mount the same? Some pics will probabley clear this up fpr me. Thanks, Mike __________________ FINISHED Project thread: 67 SWB 4x4 FINISHED Project thread: 67 SWB 6 cyl cruiser Project thread: Road Toad 70 SWB Step, 4x4, 292, 3OT 01 C5 convertable 08 Z06

10-06-2009, 11:16 PM	#2
ERASER5 Registered User Join Date: Jun 2006 Location: Indiana Posts: 4,859	Re: 1/2 ton versus 3/4 ton booster Yes, Yes, Don't know, Yes. 3/4 booster can go on a 1/2, but a 1/2 ton should not be put on a 3/4 ton. The 1/2 ton and 3/4 swap front bowl/ rear bowl. I doubt that the linkage is different, but I am not positive. The mounting bolts are the same on every 67-72 no matter the size. Any help? __________________ '70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60

10-07-2009, 07:27 AM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,859	Re: 1/2 ton versus 3/4 ton booster Pedal to booster rods vary by boosters and should be properly matched. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~



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