brake booster question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Bernie** · 02-03-2004, 04:15 PM

I know that Delco and Bendix master cylinders and boosters are different on 1/2 ton trucks, but is this true on 3/4 trucks ? In particular I have a Delco booster with rod and a master cylinder made by Bendix. They seem to fit together ok, but I'm wondering if I'll have problems with the rod length. Any opinions would be appreciated. If it makes any difference, it's on a K20 with axles off a 78.

Hooter · 02-03-2004, 08:57 PM

hmm well as far as i know the boosters are the same, just depends on what type if master cylinder you have in front of it, I dont think GM would have made two different boosters for different master cylinders. The only difference in boosters I have seen is for different GVWR's

Longhorn Man · 02-04-2004, 01:03 AM

The pushrod is adjustable anyways.

**Bernie** · 02-04-2004, 02:02 AM

Thanks for the replies. I thought it was only the pushrod that connected to the pedal that was able to be adjusted ??

Longhorn Man · 02-04-2004, 02:04 AM

ON the booster equipped trucks (at least the two 1970 ones I have had) has an adjustable pushrod in the booster. If you remove the master cylinder and pull out the rod, it is a 2 piece rod that is threaded together.

**Bernie** · 02-04-2004, 01:56 PM

Thanks, I'll look tonight.

krue · 02-04-2004, 02:36 PM

Mine is adjustable (70 GMC).

02-03-2004, 04:15 PM	#1
Bernie Senior Member Join Date: Jan 2001 Location: Northern Illinois Posts: 516	brake booster question I know that Delco and Bendix master cylinders and boosters are different on 1/2 ton trucks, but is this true on 3/4 trucks ? In particular I have a Delco booster with rod and a master cylinder made by Bendix. They seem to fit together ok, but I'm wondering if I'll have problems with the rod length. Any opinions would be appreciated. If it makes any difference, it's on a K20 with axles off a 78. __________________ Bernie

02-03-2004, 08:57 PM	#2
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	hmm well as far as i know the boosters are the same, just depends on what type if master cylinder you have in front of it, I dont think GM would have made two different boosters for different master cylinders. The only difference in boosters I have seen is for different GVWR's __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

02-04-2004, 02:02 AM	#4
Bernie Senior Member Join Date: Jan 2001 Location: Northern Illinois Posts: 516	Thanks for the replies. I thought it was only the pushrod that connected to the pedal that was able to be adjusted ?? __________________ Bernie

02-04-2004, 01:56 PM	#6
Bernie Senior Member Join Date: Jan 2001 Location: Northern Illinois Posts: 516	Thanks, I'll look tonight. __________________ Bernie

02-04-2004, 02:36 PM	#7
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	Mine is adjustable (70 GMC). __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

02-04-2004, 01:03 AM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	The pushrod is adjustable anyways.

02-04-2004, 02:04 AM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	ON the booster equipped trucks (at least the two 1970 ones I have had) has an adjustable pushrod in the booster. If you remove the master cylinder and pull out the rod, it is a 2 piece rod that is threaded together.



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