Updating 1 ton dually front discs question? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rod · 11-08-2004, 09:32 PM

Anyone updated there front discs on a duallie 71 or 72 1 ton to newer years rotors, calipers etc...what problems or things should one know? How about the older 67-70 one tons duallie to newer discs?
Do you need upper control arms or such? Rod

Rod · 11-10-2004, 10:41 PM

Ttt

longhorn71 · 11-10-2004, 10:46 PM

i think you need all the same parts just like the 1/2s.i think the 71-72 rotors are the same as the newer trucks 73-87

junkyardjohn · 11-11-2004, 12:55 AM

ROD..... I'VE GOT A WHOLE FRONT CROSSMEMBER ASSY. OUT OF A 1985 THAT I PLAN ON PUTTING UNDER MY 69 1 TON TOWTRUCK, WHEN I REPLACE THE 350 WITH A 396. HOPEFULLY THIS WINTER. THE 85 WAS A BIG BLOCK TRUCK, SO I GOT THE M/M TOWERS, STEERING GEAR BOX ALL AS AN ASSY. SHOULD MAKE FOR A GOOD UPGRADE.

JOHN

Tx Firefighter · 11-11-2004, 08:29 AM

Ttt

Duallie · 11-15-2004, 04:18 AM

I replaced the stock 12.5x1.25 rotors on my 72 Cab-n-Chassis with '77 12.5x1.5 rotors from a "CamperSpecial 10,000lb" crewcab. I reused the A-arms, replaced the balljoints, and bolted on the new spindles. No tierod alterations. The spindles are completely different, but still bolt on. I did end up running new stainless brake lines and braided hoses. The calipers are huge!
I used the hydroboost, too. During a major panic stop last year I was able to lock the front tires, and that's with a Camaro on the bed!
Does this answer your question?

Rod · 11-15-2004, 10:05 PM

Ok so its the calipers, discs and spindle I need to grab... would you know if they used the same bearings.....hmmm....well I guess not if the spindles needed to be changed.
I might be able to grab a 77 Grumman van set up myself.

11-08-2004, 09:32 PM	#1
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Updating 1 ton dually front discs question? Anyone updated there front discs on a duallie 71 or 72 1 ton to newer years rotors, calipers etc...what problems or things should one know? How about the older 67-70 one tons duallie to newer discs? Do you need upper control arms or such? Rod __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

11-10-2004, 10:41 PM	#2
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Ttt __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

11-11-2004, 12:55 AM	#4
junkyardjohn Registered User Join Date: Aug 2001 Location: SOMERSET KY. Posts: 6,425	ROD..... I'VE GOT A WHOLE FRONT CROSSMEMBER ASSY. OUT OF A 1985 THAT I PLAN ON PUTTING UNDER MY 69 1 TON TOWTRUCK, WHEN I REPLACE THE 350 WITH A 396. HOPEFULLY THIS WINTER. THE 85 WAS A BIG BLOCK TRUCK, SO I GOT THE M/M TOWERS, STEERING GEAR BOX ALL AS AN ASSY. SHOULD MAKE FOR A GOOD UPGRADE. JOHN __________________ junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES// LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST

11-11-2004, 08:29 AM	#5
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Ttt __________________ I'm on the Instagram- @Gearhead_Kevin

11-15-2004, 04:18 AM	#6
Duallie Registered User Join Date: Feb 2001 Location: Nikiski, Alaska Posts: 477	I replaced the stock 12.5x1.25 rotors on my 72 Cab-n-Chassis with '77 12.5x1.5 rotors from a "CamperSpecial 10,000lb" crewcab. I reused the A-arms, replaced the balljoints, and bolted on the new spindles. No tierod alterations. The spindles are completely different, but still bolt on. I did end up running new stainless brake lines and braided hoses. The calipers are huge! I used the hydroboost, too. During a major panic stop last year I was able to lock the front tires, and that's with a Camaro on the bed! Does this answer your question? __________________ Just as if I knew what I was doin'

11-10-2004, 10:46 PM	#3
longhorn71 Senior Member Join Date: Sep 2004 Location: CANADA Posts: 1,681	i think you need all the same parts just like the 1/2s.i think the 71-72 rotors are the same as the newer trucks 73-87

11-15-2004, 10:05 PM	#7
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Ok so its the calipers, discs and spindle I need to grab... would you know if they used the same bearings.....hmmm....well I guess not if the spindles needed to be changed. I might be able to grab a 77 Grumman van set up myself. __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

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