Are the 71-72 front disc brake caliper rubber hose fitting threads different sizes?

[Gregski]

doing a 71-72 disc brake upgrade and noticed when I bought two brand new 71-72 rubber brake lines for the calibers the passenger side threads are larger for where the metal lines screw in to them than on the driver side, I am wondering if that be intentional by General Motors?

[70STOVEBOLT]

No, someone has probably replaced the passenger side with a newer caliper with metric threads.

[Gregski]

Originally Posted by 70STOVEBOLT

No, someone has probably replaced the passenger side with a newer caliper with metric threads.

thanks for the reply I apologize for not being clearer, both calipers are brand new and I bought them both, this is not the part that screws into the caliper this is the other end of the rubber hose that attaches to the crossmember bracket and has the metal brake line screw into it

[mr.mud1]

yes,both hoses are different on the steel brake line end and 2 different size inverted nuts.here's the original hoses from my one owner 72 truck,and a set of new hoses.the new hoses were too short,couldn't use them but they had the correct ends.take care.Greg

[Gregski]

Originally Posted by mr.mud1

yes,both hoses are different on the steel brake line end and 2 different size inverted nuts.here's the original hoses from my one owner 72 truck,and a set of new hoses.the new hoses were too short,couldn't use them but they had the correct ends.take care.Greg

thank you thank you so much, that was such a perfect response just what I needed (I can stop pulling my hair out now)

[kwmech]

Sounds like he is doing a conversion from drum to disc. If that is the case, I had to have my right hand hose custom made for the large fitting on that side. That was easier than redoing the hard line from the left side.

[mr.mud1]

Originally Posted by kwmech

Sounds like he is doing a conversion from drum to disc. If that is the case, I had to have my right hand hose custom made for the large fitting on that side. That was easier than redoing the hard line from the left side.

yes sir,i'd guess that's what's going on.i was having fits with mine,i bought several sets of hoses,all too short??my original hoses weren't bad,just 50 years old and i wanted new ones,finally found a place in Michigan that had the correct hoses.all good.

[Gregski]

does anybody know why they did that? why is the passenger side larger? does it require a larger 1/4" metal brake line?