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08-05-2023, 09:00 PM
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#1 |
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Registered User
Join Date: Feb 2022
Location: Ca
Posts: 444
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Front flex lines
I bought a pair of front flex brake lines from Rock Auto about 18 months ago. They were Chinese crap and fit too tight in my opinion. Should have trusted my gut. Today one failed and stranded me. Lucky no damage. Does anyone have a good source for 72 3/4 ton disc flex lines. I am tempted to run over to ProLine. They make custom but prefer to have a more oem look even though they are not very visible
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08-05-2023, 09:47 PM
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#2 | |
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Registered User
Join Date: Dec 2020
Location: Joggins Nova Scotia
Posts: 1,598
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Re: Front flex lines
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08-05-2023, 10:19 PM
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#3 |
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Senior Member
 
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,867
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Re: Front flex lines
I'm happy with the brake lines I bought from Inline Tube. They fit pretty easily and seem to be made well.
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I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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08-05-2023, 10:52 PM
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#4 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,576
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Re: Front flex lines
Got mine years ago at NAPA, all good but they are a bit longer than stock which was great because of my 2.5" front springs. I'll see if I can find the receipt and get a part number.
EDIT: Found it! NAPA part # UP 36761.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay Last edited by Stocker; 08-05-2023 at 11:05 PM. |
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08-05-2023, 11:20 PM
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#5 |
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Senior Member
Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,629
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Re: Front flex lines
Check out GMC Pauls. I feel they make an effort to avoid selling junk. I've apparently been an advertiser of theirs because I've mentioned them in other posts. I feel they have done the homework for us and know what's good. My disclaimer is I haven't specifically bought 72 3/4ton brake lines from them, but the stuff I have bought is very good. I prefer to buy locally but when I can't put my hands on it right there in a store and see if it feels or looks like junk, I go look on GMC Pauls website for it. If I don't find it there, it probably means they're not carrying that part at all because pretty much all manufacturers for that particular part are junk and buyer beware, and I usually end up getting a used original one whatever that part is from you guys here in the parts section.
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08-06-2023, 06:34 PM
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#6 |
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Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,480
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Re: Front flex lines
I take the broken stuff or what I've got to my local radiator shop. They have a machine to make and pressure check just about anything you want.
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08-06-2023, 10:15 PM
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#7 |
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Senior Member
Join Date: Nov 2003
Location: NEAR MARYSVILLE,KANSAS 66508
Posts: 469
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Re: Front flex lines
Brake Hoses Unlimited in Allegan Michigan 1-616-836-7885
This guy knows his stuff and good to work with. Made up a set for my 1972 1 ton that I couldn't find anywhere. Total cost shipped was $60 Highly recommend him Ron
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1972 C30 Cheyenne Super 1971 C10 (Parts truck) |
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08-06-2023, 10:59 PM
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#8 |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,279
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Re: Front flex lines
I put disc brakes on the front of my truck without routing new hard lines. I used '73 flex lines and routed them for safe braking. There are many ways to skin this cat.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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08-07-2023, 10:22 PM
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#9 | |
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Registered User
Join Date: Feb 2022
Location: Ca
Posts: 444
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Re: Front flex lines
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08-08-2023, 05:54 AM
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#10 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,862
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Re: Front flex lines
You're talking about brake hose, right? That's the correct term. I but mine from NAPA right in town. Brake lines are the hard metal hard lines bent to fit
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"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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08-14-2023, 12:28 PM
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#11 |
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Registered User
Join Date: Jul 2017
Location: Utah
Posts: 35
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Re: Front flex lines
I had the same issue finding ones for my '72 C20 and got these: https://www.speedwaymotors.com/DOT-B...-20,36151.html
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08-14-2023, 02:13 PM
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#12 |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,279
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Re: Front flex lines
As for why I used the '73 lines, it's because I was too lazy to install steel lines that went to the front of the front crossmember- I kept the old drum brake lines, and the '71-'72 hoses wouldn't reach, of course.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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08-16-2023, 10:00 PM
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#13 |
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Registered User
Join Date: Feb 2022
Location: Ca
Posts: 444
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Re: Front flex lines
So an update. The Flex lines I dis'ed Rock Auto for selling me that I feel is ever so slightly short and putting what I feel is excessive stress on the fittings did not fail. I ordered a set from Paul's GMC, they are Brother's. And by the way exactly the same as Rock Auto. I did not bother to replace.
Bottom line. Not confidence inspiriting. The actual issue ended up being the PV2 Proportion Valve (It's really a Combination Valve) purchased about a year ago from InLine Tube. The front of the assembly failed squirting break fluid towards the left front wheel giving the impression of a failed line given the fluid was all over that area. |
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