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Disc swap calliper question?

highrlr

highrlr

1/2 ton status
Joined
Nov 29, 2004
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Location
Bismarck, ND
I need a little help, and possibly a part number if anyone has one. They have two part numbers at napa for the chevy 3/4 ton front calipers, I need to know which one to use for my 14bff disc swap. Also, do I use the same caliper mounting bolts that would be used on the front of a 3/4 ton? My truck is 700miles away since I am away at school right now and im trying to get the parts compiled so I can run home for a weekend and finish it up and then make a mad dash back to Wyoming to do some wheeling. Should be interesting! Any help would be greatly appreciated!
 
just make sure the caliper is for a 73-87 3/4 ton or 1/2 ton. the two part numbers are probably for a 10 bolt and D44.
 
Masiony said:
just make sure the caliper is for a 73-87 3/4 ton or 1/2 ton. the two part numbers are probably for a 10 bolt and D44.
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yep. just make sure you run either both 1/2 tons or both 3/4 tons...they both will bolt up, but the 3/4 ton calipers have larger pistons.
 
There is no difference between 1/2 and 3/4 ton calipers, and i have no idea why Napa has 2 part numbers. I work in a machine shop that has a parts store up front and i've had the guys check and they only show one part number for a caliper or our rigs. Do yourself a favor though and buy a caliper that fits your year rig that way you have the same line going into it IE: either 10mm metric or 7/16" american banjo bolts.
 
4X4HIGH said:
There is no difference between 1/2 and 3/4 ton calipers, and i have no idea why Napa has 2 part numbers. I work in a machine shop that has a parts store up front and i've had the guys check and they only show one part number for a caliper or our rigs. Do yourself a favor though and buy a caliper that fits your year rig that way you have the same line going into it IE: either 10mm metric or 7/16" american banjo bolts.
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44's have 7/16 banjo's while 10 bolts have 10mm. this is probably the reason for the two part numbers.
 
Actually, that makes sense. :doah:

I think however that even some D44's had the 10mm banjo bolt if i'm not mistaken. But two part numbers to cover that small difference does makes sense but not for a 1/2 ton versus a 3/4 ton because in that sense they are the same.
 
4X4HIGH said:
Actually, that makes sense. :doah:

I think however that even some D44's had the 10mm banjo bolt if i'm not mistaken. But two part numbers to cover that small difference does makes sense but not for a 1/2 ton versus a 3/4 ton because in that sense they are the same.
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i also was under the assumtion that all 60's had 10mm banjo's till my buddies 78' had 7/16 ones.
 
GM switched over to the 10mm banjo bolt when they switched to the 10bolt axle.
 
4X4HIGH said:
There is no difference between 1/2 and 3/4 ton calipers,
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I purchased both a month or so ago and the pistons were different sizes. About 1/4" outside to outside.


I would go with the 1/2 ton stuff. OR. You can get the Caddy calipers for like 60.00 from Oriellys. The piston in them is even smaller(better IMO).
 
Since no one has given you an exact answer yet, maybe this will help. When I did mine, here are the part numbers that I used from O'Reilly. There is a $15 core charge on the calipers if you don't have any old ones laying around to take in for exchange.

A1 Front Left Rebuilt Caliper 1 A1 18-4046 $16.29
A1 Front Right Rebuilt Caliper 1 A1 18-4045 $16.29
Standard Brake Front Disc Rotor 2 SB 81-60427 $24.99 $49.98
Caliper Bolts (Guide Bolt) 2 BB HDW5004 $5.49 $10.98
Disc Pad Set 1 BB MKD52 $17.99
$111.53
Misc
Inner Wheel seal 1 NAT 2081 $6.99
Wheel Studs 4 DOR 610-189 $3.19 $12.76
O'Reilly Total $131.28

Speedway Motors QTY PN
Proportioning Vave Wilwood 1 8352608419 $38.95
3/16 x 20" steel brake line(1) 2 910 31800-20 $2.50 $5.00
Brake Line Mount Tabs (pkg 4) 1 910 31310 $9.95
3/8-24 IFF to AN -4 Male (Pair) 1 6174029 $9.95
SS Braided Line 12" (AN 4) 2 910 31842-4 $9.95 $19.90
90 deg 7/16-20 to AN-4 2 6172062 $7.95 $15.90
Speedway Total $99.65

Total $230.93


My SS Braided brake line could have been a little bit shorter, but it worked.
 
cbbr said:
What year caddy caliper did you use? I need to get a set and I want an e-brake.
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1977 caddy eldorado. You will have to fab up a lever for the e-brake and get some kind of spring. They are long ago discontinued from Chevy. You will also need some Chevette brake hoses and a couple hardlines.
 
4X4HIGH said:
There is no difference between 1/2 and 3/4 ton calipers, and i have no idea why Napa has 2 part numbers. I work in a machine shop that has a parts store up front and i've had the guys check and they only show one part number for a caliper or our rigs. Do yourself a favor though and buy a caliper that fits your year rig that way you have the same line going into it IE: either 10mm metric or 7/16" american banjo bolts.
Click to expand...

yeah i found the same thing when i was looking for calipers, but after having a set of both at my house ive measured the pistons and they are different.

unless i suppose they were for some reason they are from different years and chevy changed their piston diameters among both the 1/2 ton and 3/4 stuff.
 
cbbr said:
Thanks for the run down. One more question, looks like you are running with no e-brake - front calipers - correct?
Click to expand...

Yeah, I'm using a driveline brake for my parking brake. Not ideal, but it's worked for me.
 
Sweet, thanks for all the answers everyone! I will get the parts on order, but now I have to decide between the caddies or the 3/4 ton calipers. I would like to have an e-brake again eventually so I will probably go with the caddies. I can still run the caddies without the e-brake hooked up correct? Oh, and is an adjustable proportioning valve needed, or can I run without one? Thanks alot again for the help, this is hard since my truck is over 600 miles away from me right now, and I will have minimal time to finish it when I get back home, so I need to have all the correct parts there, waiting for me.
 
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