Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 11-16-2012, 04:44 PM   #1
John R
Senior Member
 
Join Date: May 2010
Location: near Washington, DC
Posts: 436
Default Brakes: 39-42 vs 46-48

By design, the 46-48 brakes, with their fixed lower anchors and floating shoes, eliminate the need for periodic adjustment of the lower shoe anchors as in the 39-42 type. The no-adjustment feature appears to be an advantage - keeping the brake in proper adjustment for a longer period (?) or maybe just a convenience factor for lazy people like me. I would like to hear from Fordbarners that have used both types and hear their opinions as to what the tradeoffs are. Thanks.
__________________
Those who do not move do not die, but are they not already dead?
John R is offline   Reply With Quote
Old 11-16-2012, 05:00 PM   #2
mrtexas
Senior Member
 
mrtexas's Avatar
 
Join Date: May 2010
Location: Sugar Land, TX
Posts: 4,148
Default Re: Brakes: 39-42 vs 46-48

46-48 are far better IMHO than 40/42s. Even better are the bendix backing plates sold by several vendors.
mrtexas is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 11-16-2012, 05:22 PM   #3
Vic Piano
Senior Member
 
Vic Piano's Avatar
 
Join Date: May 2010
Location: Odessa, FL
Posts: 7,523
Default Re: Brakes: 39-42 vs 46-48

I have a '39 CS and also a '47 Convertible, and I much prefer the later'42-'48 brakes as they are easier to set up and adjust.
__________________
Imagination is more important than knowledge.
Vic Piano is offline   Reply With Quote
Old 11-16-2012, 05:29 PM   #4
Bassman/NZ
Senior Member
 
Bassman/NZ's Avatar
 
Join Date: May 2010
Location: Napier, New Zealand
Posts: 2,001
Default Re: Brakes: 39-42 vs 46-48

Agreed. I have 39s on the front and 47s on the rear. The 39s are a pain.
Bassman/NZ is offline   Reply With Quote
Old 11-16-2012, 05:29 PM   #5
Ken/Alabama
Senior Member
 
Ken/Alabama's Avatar
 
Join Date: May 2010
Location: Alabama
Posts: 2,193
Default Re: Brakes: 39-42 vs 46-48

The later is definatly quicker and easier but if the early ones are done correctly I think you can achieve better contact between the shoe and drum. Of coarse the real way to do it is to have the shoes arched or ground to fit the drum for optimum contact area but no one can do this anymore ,at least not around here.
Ken/Alabama is offline   Reply With Quote
Old 11-16-2012, 06:07 PM   #6
KiWinUS
Senior Member
 
KiWinUS's Avatar
 
Join Date: May 2010
Location: Charlotte NC KiWi-L100 available here
Posts: 1,763
Default Re: Brakes: 39-42 vs 46-48

Quote:
Originally Posted by Ken/Alabama View Post
The later is definatly quicker and easier but if the early ones are done correctly I think you can achieve better contact between the shoe and drum. Of coarse the real way to do it is to have the shoes arched or ground to fit the drum for optimum contact area but no one can do this anymore ,at least not around here.
Absolutely correct Ken !!!!!
Cheers
Tony
KiWinUS is offline   Reply With Quote
Old 11-16-2012, 06:24 PM   #7
John R
Senior Member
 
Join Date: May 2010
Location: near Washington, DC
Posts: 436
Default Re: Brakes: 39-42 vs 46-48

Quote:
Originally Posted by Ken/Alabama View Post
..... Of coarse the real way to do it is to have the shoes arched or ground to fit the drum for optimum contact area but no one can do this anymore ,at least not around here.
Arcing the shoes is good for either type of anchor. But, like you say, its hard to find people or equipment to do this nowadays.
__________________
Those who do not move do not die, but are they not already dead?
John R is offline   Reply With Quote
Old 11-16-2012, 06:38 PM   #8
jbc
Senior Member
 
jbc's Avatar
 
Join Date: May 2011
Location: ocala fl
Posts: 160
Default Re: Brakes: 39-42 vs 46-48

There a brake shop here in Ocala Fl that still match grinds the shoes to the drums, and the price is reasonable. If anyone is interested, I'll get there infomation.
John
jbc is offline   Reply With Quote
Old 11-17-2012, 09:44 AM   #9
Adam/Mill Valley CA
Senior Member
 
Adam/Mill Valley CA's Avatar
 
Join Date: May 2010
Location: Mill Valley,CA
Posts: 165
Default Re: Brakes: 39-42 vs 46-48

I've read of a method for arcing the shoes where you put a sheet of sandpaper between the new shoe and the drum, and arc it by moving the shoe back and forth by hand until the contact is completely even-haven't tried it myself, though

Adam
__________________
1936 pickup, stock, black
1965 Mustang coupe 289/4bbl, black/red
1971 Ala Romeo GTV 1750 coupe, dark red/tan
1970 911E 2.2 litre dark blue/black
1968 BMW R50/2 US, black (m'cycle)
1967 Triumph TR6R , sea foam/cream (m'cycle)
1992 BMW R100RS blue/silver (m'cycle)
1974 Honda CB750 red (m'cycle)
2000 Kawasaki W650 blue/silver (m'cycle)
Adam/Mill Valley CA is offline   Reply With Quote
Old 11-17-2012, 11:40 AM   #10
Zeke...PA
Senior Member
 
Zeke...PA's Avatar
 
Join Date: May 2010
Location: Delta, PA
Posts: 525
Default Re: Brakes: 39-42 vs 46-48

Using adhesive backed 2 3/4" sanding paper works great. I used on my A also. Zeke
Attached Images
File Type: jpg fitting shoes 001.JPG (125.1 KB, 42 views)
File Type: jpg fitting shoes 002.JPG (124.5 KB, 37 views)
__________________
Only problem with retirement is never a day off
Zeke...PA is offline   Reply With Quote
Old 11-17-2012, 11:44 AM   #11
Charlie Stephens
Senior Member
 
Join Date: May 2010
Location: Southern California
Posts: 6,037
Default Re: Brakes: 39-42 vs 46-48

Quote:
Originally Posted by John R View Post
Arcing the shoes is good for either type of anchor. But, like you say, its hard to find people or equipment to do this nowadays.
You might try contacting the retailer that sold you the shoes and see if they can send them back to the company that relined the shoes to be arced. Of course you will need to supply the accurate drum diameter. Usually companies in the business have invested in the equipment so they can do it legally.

Charlie Stephens
Charlie Stephens is offline   Reply With Quote
Old 11-17-2012, 03:09 PM   #12
Ken/Alabama
Senior Member
 
Ken/Alabama's Avatar
 
Join Date: May 2010
Location: Alabama
Posts: 2,193
Default Re: Brakes: 39-42 vs 46-48

Quote:
Originally Posted by Zeke...PA View Post
Using adhesive backed 2 3/4" sanding paper works great. I used on my A also. Zeke
That's what I do also. Little time consuming but worth the effort.
Ken/Alabama is offline   Reply With Quote
Old 11-17-2012, 06:40 PM   #13
John R
Senior Member
 
Join Date: May 2010
Location: near Washington, DC
Posts: 436
Default Re: Brakes: 39-42 vs 46-48

This thread got a little off-topic. Any more comments on 39-42 vs. 46-48 brakes? Thanks for your advice/comments!
__________________
Those who do not move do not die, but are they not already dead?
John R is offline   Reply With Quote
Old 11-17-2012, 08:29 PM   #14
34flathead
Senior Member
 
34flathead's Avatar
 
Join Date: May 2010
Location: norcal
Posts: 173
Default Re: Brakes: 39-42 vs 46-48

i replaced the rear '39-'42 to '46-'48, much happier, the front will be done soon,
and any big rig shop that rebuilds clutchs and brakes should be able to reline your shoes (they line the hole shoe) cut the drums and arc the shoes to each drum.
rich
34flathead is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 08:14 PM.