Boonie Buster
Stuck on a Curb
What does it take to convert from drum to disc on an older FJ40? I have a buddy at work that wants to do it, since his drums are bad... :corn:
-
Help Support Hardline Crawlers :
FJ40 with drums convert to discs
- Thread starter Boonie Buster
- Start date
wayne_fj40
Well-Known Member
- Joined
- Mar 27, 2006
- Messages
- 1,153
Get a mini truck front end and use everthing from the knuckles out
Boonie Buster
Stuck on a Curb
wayne_fj40
Well-Known Member
- Joined
- Mar 27, 2006
- Messages
- 1,153
Yes the mini truck knuckles are a little beafier and easier to find parts for
Boonie Buster
Stuck on a Curb
ok, cool, i will let him know! thanks wayne! :awesomework:
wayne_fj40
Well-Known Member
- Joined
- Mar 27, 2006
- Messages
- 1,153
I forgot the birfs as well they are stronger and if its coure spline now he will need them anyway for the hubs to work.
orangecrush1
Well-Known Member
tell him to buy my front its disk 4340 inner and outers with E-locker 410. he will save time and money in the long run.
Alan
Broken on Backdoor
- Joined
- Jun 24, 2007
- Messages
- 533
Hi All:
Like "WayneFJ40" wrote, the Toyota 4wd mini-truck solid front axle is a good donor.
Any 1976-89 Land Cruiser with disc brakes is a worthy donor to convert a drum brake frontend to discs. Like the mini-truck frontend, one would use the inner axles, CV joints (aka "Birfields"), knuckles, lock-out hubs, etc.
What year is your friend's FJ40?
Regards,
Alan
--------------------------------------------------
Like "WayneFJ40" wrote, the Toyota 4wd mini-truck solid front axle is a good donor.
Any 1976-89 Land Cruiser with disc brakes is a worthy donor to convert a drum brake frontend to discs. Like the mini-truck frontend, one would use the inner axles, CV joints (aka "Birfields"), knuckles, lock-out hubs, etc.
What year is your friend's FJ40?
Regards,
Alan
--------------------------------------------------
Last edited:
64FJ40
Well-Known Member
If he's not bent on upgrading and just needs some workable drums, I've got a whole mess of them holding my garage floor down 
Assuming it's a '68-'75, it's a pretty straight-forward swap, but it's not quite as "bolt-in" as it sounds.
The ends of the axle housings need to be opened up a little bit to fit the bigger birfields from the truck axle. The birfs fit fine inside the bell once you open up the 'fishmouth' a little wider to fit them in.
He'll need to use the steering arms from the truck knuckles since the stud pattern is different. The stock TREs will now be too small. Depending on how involved he wants to get, there are a few ways to deal with this. In short, if he plans to convert to PS or change anything with the steering, this would be a good time to do it all one time.
In the same vein, I'd strongly encourage putting discs on the rear as well. You can probably do it for ~$250 including rotors, brackets, calipers, pads, hoses, and a proportioning valve.
Again assuming he's got a '68-'75, he already has a dual-circuit brake system. But the stock residual valves in the master cylinder are not intended for use with disc brake calipers.
Assuming it's a '68-'75, it's a pretty straight-forward swap, but it's not quite as "bolt-in" as it sounds.
The ends of the axle housings need to be opened up a little bit to fit the bigger birfields from the truck axle. The birfs fit fine inside the bell once you open up the 'fishmouth' a little wider to fit them in.
He'll need to use the steering arms from the truck knuckles since the stud pattern is different. The stock TREs will now be too small. Depending on how involved he wants to get, there are a few ways to deal with this. In short, if he plans to convert to PS or change anything with the steering, this would be a good time to do it all one time.
In the same vein, I'd strongly encourage putting discs on the rear as well. You can probably do it for ~$250 including rotors, brackets, calipers, pads, hoses, and a proportioning valve.
Again assuming he's got a '68-'75, he already has a dual-circuit brake system. But the stock residual valves in the master cylinder are not intended for use with disc brake calipers.
Boonie Buster
Stuck on a Curb
It's a '74. How much would ya want for a set of drums?!?! Not sure if he needs the pads, but the drums i think would help! :awesomework: I think he's looking for something on the cheap right now, I think discs are in the distant future for him... :booo: I just want to help get it going! :awesomework:
He makes instrument panels for the FJ's too! Here's a link:
http://www.trailcandy.com/ (sorry mods if this is against the rules, but i don't read the rules.:fawkdancesmiley::haha
He makes instrument panels for the FJ's too! Here's a link:
http://www.trailcandy.com/ (sorry mods if this is against the rules, but i don't read the rules.:fawkdancesmiley::haha
Last edited:
64FJ40
Well-Known Member
It's a '74. How much would ya want for a set of drums?!?! Not sure if he needs the pads, but the drums i think would help! :awesomework: I think he's looking for something on the cheap right now, I think discs are in the distant future for him... :booo: I just want to help get it going! :awesomework:
He makes instrument panels for the FJ's too! Here's a link:
http://www.trailcandy.com/ (sorry mods if this is against the rules, but i don't read the rules.:fawkdancesmiley::haha
I could not in good conscience charge for anything drum-brake related. If and when I ever get around to working on my own junk, I'll have Cody's old disc brakes to sell fairly cheap, but they're not ready to go yet. They would actually be almost a bolt-in upgrade for him.
Let me know when he wants to come get 'em and I'll see how many I've got tucked away. There just isn't any reason I'll ever need them in the future.
And those clusters would look WAY out of place on my junk. :haha: Cool stuff, though.
