International Full Size Jeep Association
Home Forums Reader's Rigs Tech Library Trail Stories FSJ-List
International Full Size Jeep Association  

Go Back   International Full Size Jeep Association > Tire Kickin' > General FSJ Discussion

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 10-19-2021, 07:03 PM
J20DAN J20DAN is offline
232 I6
 
Join Date: May 12, 2002
Location: Elkton, MD
Posts: 165
Power brake pedal '73 and '72 and earlier

In looking in the parts manual, the power brake pedal for Auto trans gives one number for "all" and then it also list a number for '73? The engine listing is a bit different but it overlaps. Does anyone have an idea if these pedals are basically the same from '73 and earlier?

The reason ask is I have a source for a '73 and it will be used in a '66.

Thanks
__________________
1979 J20, Firecraker Red
Reply With Quote
  #2  
Old 10-19-2021, 07:18 PM
babywag's Avatar
babywag babywag is offline
out of order
 
Join Date: Jun 08, 2005
Location: Land of froot loops and cukcoo-nuts, CA
Posts: 9,977
My 73 was a unicorn.
One year only...different than earlier/later.
Booster too.

I swapped in 79 parts.

Can't speak for '66. But if you're gonna go through the effort go with later model parts!! Easier to find.

My '67 is getting GM brake parts(booster/master/pedal)
__________________
Tony
88 GW, 67 J3000, 07 Magnum SRT8
Reply With Quote
  #3  
Old 10-19-2021, 07:21 PM
J20DAN J20DAN is offline
232 I6
 
Join Date: May 12, 2002
Location: Elkton, MD
Posts: 165
I am not sure the later power brake pedals will fit or interchange with 72 and earlier is the issue and I have no idea how'73 is different than anything else.
__________________
1979 J20, Firecraker Red
Reply With Quote
  #4  
Old 10-19-2021, 10:05 PM
babywag's Avatar
babywag babywag is offline
out of order
 
Join Date: Jun 08, 2005
Location: Land of froot loops and cukcoo-nuts, CA
Posts: 9,977
later stuff won't interchange.
basically you'd be modifying/installing different parts.
__________________
Tony
88 GW, 67 J3000, 07 Magnum SRT8
Reply With Quote
  #5  
Old 10-20-2021, 09:14 AM
Heep-J4000's Avatar
Heep-J4000 Heep-J4000 is offline
258 I6
 
Join Date: Feb 09, 2014
Location: Schoorl ,the Nederlands
Posts: 442
If you have the big bracket with the pedals complete there is a big change that that it fits.

I compared the bracket from my 73 j4000 with a 80 j10 and the bracket is the same only different pedals because the 73 is manual and the 80 was automatic transmission.

What I saw was that it is even possible to convert to different pedals because there is one big bolt that holds the pedals with a couple bushings for spacing.
__________________
Jeep "because mother nature hates flat roads to"

http://www.ifsja.org/forums/vb/showthread.php?t=180974

99' Dodge ram 2500 4x4 crew cab 5.9 Cummins ,backup work truck for now
73' Jeep J4000 (named Heep or Desert Dragon) amc 360 V8 converted to LPG with T15/D20 (was my daily work truck for thirteen years and is going to have major overhaul
80' Jeep cj5 350 V8 Chevy/ms420/D300 (a slow ongoing never finished project)

Trucks/car's from the past:
85' Volkswagen caddy mk1 1.6 diesel.
83 Toyota land cruiser BJ42 3.4 diesel.
Reply With Quote
  #6  
Old 10-20-2021, 11:51 AM
babywag's Avatar
babywag babywag is offline
out of order
 
Join Date: Jun 08, 2005
Location: Land of froot loops and cukcoo-nuts, CA
Posts: 9,977
the firewall mount holes are different early vs. later.
the pedal support won't just swap.
Even on my 73 it required some help to swap in 79 parts.
Don't recall if I had to drill 1 or 2 new holes?

Also the pedal bend is different on later ones due to larger diameter steering column.

They can be made to work but it is not a bolt in.
__________________
Tony
88 GW, 67 J3000, 07 Magnum SRT8
Reply With Quote
  #7  
Old 10-20-2021, 06:09 PM
backroadin''s Avatar
backroadin' backroadin' is offline
350 Buick
 
Join Date: Aug 11, 2004
Location: Vermont
Posts: 1,026
If you have access to the whole rig (the 73) then get everything.... the bracket, the pedals, booster, anything related to the brake pedal and booster system. Get the brake light switch too. Chances are the bracket that the pedals hang from will bolt up under any dash, and if you have that, you can make it all work.

I swapped in a 77 pedal assembly/brake system into my 73 so I could have power brakes. I can't remember if I used the 73 bracket or not but I'm pretty sure I had to use the 77 pedal. I had to drill new holes for the booster. If you got all the parts between the two rigs, I think you'll be fine.

Side note, both my rig and the donor were standards, so that simplified things. I wonder if being a jeep, that the bracket is the same regardless. Seems unlike AMC to have two different brackets for std and auto, but maybe. I have no experience with auto FSJ's.

As far as 73's go, some had the earlier parts and I'm guessing the later 73's had the later parts. There's alot in mine that is the same as the later years.
__________________
"Roads? Where we're going we don't need roads." -- Dr Emmett Brown

"When this baby reaches 88 miles per hour, you're gonna to see some serious sht!"

73 Wagoneer - 4.6L Stroker (yeah baby!!) t176/d300, 3.73's, 33" muds, 4"spring lift, 2" body. Offy dualport w/ Quadrajet, pertronix, flowmaster.
Reply With Quote
  #8  
Old 10-22-2021, 01:05 PM
Heep-J4000's Avatar
Heep-J4000 Heep-J4000 is offline
258 I6
 
Join Date: Feb 09, 2014
Location: Schoorl ,the Nederlands
Posts: 442
When I got my 73' j4000 it didn't have power brakes and power steering.

Made a bracket to bolt a booster and master brake cylinder of a older type Bedford Van i found in that timeframe when I was looking for conversion parts.
For the power steering conversion i got a steering gear with steering shaft and column from a xj jeep Cherokee at a local pick and pull.

So for building or updating a jeep,
a lot of part can be used , but it depends on the person working on it!
__________________
Jeep "because mother nature hates flat roads to"

http://www.ifsja.org/forums/vb/showthread.php?t=180974

99' Dodge ram 2500 4x4 crew cab 5.9 Cummins ,backup work truck for now
73' Jeep J4000 (named Heep or Desert Dragon) amc 360 V8 converted to LPG with T15/D20 (was my daily work truck for thirteen years and is going to have major overhaul
80' Jeep cj5 350 V8 Chevy/ms420/D300 (a slow ongoing never finished project)

Trucks/car's from the past:
85' Volkswagen caddy mk1 1.6 diesel.
83 Toyota land cruiser BJ42 3.4 diesel.
Reply With Quote
  #9  
Old 10-23-2021, 06:32 AM
Crankyolman's Avatar
Crankyolman Crankyolman is offline
327 Rambler
 
Join Date: Sep 27, 2017
Location: Pacific Northwest
Posts: 713
'72 and '73s were transition years so they tend to have one or two year only parts which can be an issue. If you are modifying the '66 to fit parts I think it's best to try to find '74 and later parts because they are much easier to find when things need replaced.
__________________
'72 J4500
Reply With Quote
  #10  
Old 10-23-2021, 09:22 PM
Crankyolman's Avatar
Crankyolman Crankyolman is offline
327 Rambler
 
Join Date: Sep 27, 2017
Location: Pacific Northwest
Posts: 713
I also forgot to mention an issue I am once again having.

I don't know if the '73s have pressure switch mounted on the bottom of the master cylinder as the stop (brake) light switch but my '72 does and in the past couple days I have once again had one fail after less than a year, this time a Delco. This can leave you with no brake lights, or turn the brake lights on when it's parked causing a drain on the battery. I'm pretty sure my truck went 47 years before the original switch failed but after that the switches have only lasted a year. They are cheap and easy to change but it could be a safety issue to consider.
__________________
'72 J4500
Reply With Quote
  #11  
Old 10-25-2021, 10:00 AM
J20DAN J20DAN is offline
232 I6
 
Join Date: May 12, 2002
Location: Elkton, MD
Posts: 165
At this point I think I will go the hydroboost route. However, it is suggested I still use a power brake pedal. So still looking.
__________________
1979 J20, Firecraker Red
Reply With Quote
  #12  
Old 10-25-2021, 12:22 PM
Heep-J4000's Avatar
Heep-J4000 Heep-J4000 is offline
258 I6
 
Join Date: Feb 09, 2014
Location: Schoorl ,the Nederlands
Posts: 442
Quote:
Originally Posted by Crankyolman
I also forgot to mention an issue I am once again having.

I don't know if the '73s have pressure switch mounted on the bottom of the master cylinder as the stop (brake) light switch but my '72 does and in the past couple days I have once again had one fail after less than a year, this time a Delco. This can leave you with no brake lights, or turn the brake lights on when it's parked causing a drain on the battery. I'm pretty sure my truck went 47 years before the original switch failed but after that the switches have only lasted a year. They are cheap and easy to change but it could be a safety issue to consider.

My 73' had a brake light switch on the pivot point of the master brake cylinder.
It wore out after fourty years and the last thirteen years of daily use.
So had no brake light at all
Removed the switch and put some pressure switch from a jeep cj in place with a home made bracket.
__________________
Jeep "because mother nature hates flat roads to"

http://www.ifsja.org/forums/vb/showthread.php?t=180974

99' Dodge ram 2500 4x4 crew cab 5.9 Cummins ,backup work truck for now
73' Jeep J4000 (named Heep or Desert Dragon) amc 360 V8 converted to LPG with T15/D20 (was my daily work truck for thirteen years and is going to have major overhaul
80' Jeep cj5 350 V8 Chevy/ms420/D300 (a slow ongoing never finished project)

Trucks/car's from the past:
85' Volkswagen caddy mk1 1.6 diesel.
83 Toyota land cruiser BJ42 3.4 diesel.
Reply With Quote
  #13  
Old 10-25-2021, 12:28 PM
Heep-J4000's Avatar
Heep-J4000 Heep-J4000 is offline
258 I6
 
Join Date: Feb 09, 2014
Location: Schoorl ,the Nederlands
Posts: 442
Quote:
Originally Posted by J20DAN
At this point I think I will go the hydroboost route. However, it is suggested I still use a power brake pedal. So still looking.

I'm also doing the hydroboost conversion on my 73 j4000 at the moment.
Only had to remake the bracket that is on the hydroboost cylinder to the firewall and shorten the rod to get on the correct distance on the brake pedal pivot. (Not necessary when not installing a Cummins engine!)
Still having all 73' pedals in their original position.
__________________
Jeep "because mother nature hates flat roads to"

http://www.ifsja.org/forums/vb/showthread.php?t=180974

99' Dodge ram 2500 4x4 crew cab 5.9 Cummins ,backup work truck for now
73' Jeep J4000 (named Heep or Desert Dragon) amc 360 V8 converted to LPG with T15/D20 (was my daily work truck for thirteen years and is going to have major overhaul
80' Jeep cj5 350 V8 Chevy/ms420/D300 (a slow ongoing never finished project)

Trucks/car's from the past:
85' Volkswagen caddy mk1 1.6 diesel.
83 Toyota land cruiser BJ42 3.4 diesel.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
The Emission vs. Mileage vs. Power... Tinkerjeep General FSJ Tech 103 02-24-2013 01:36 PM
Brake fail help Chumley360 General FSJ Tech 4 04-24-2010 02:59 PM
Post 1980 power seat bases in a 79 Cherokee rmorit01 General FSJ Tech 2 11-24-2009 04:27 PM
brake problems...help!!!! disc/disc hydroboost setup quikclimber Off-Road FSJ Tech 16 10-04-2008 10:16 AM
extended brake lines for earlier FSJ's Josh D General FSJ Tech 0 04-08-2002 03:18 AM


All times are GMT -6. The time now is 06:45 AM.


Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
corner corner