I have a 1972 FJ40 with Drum brakes and want to change to a 1983 mini Truck front end with disk brakes. (1 Viewer)

[406mud]

I have a 1972 FJ40 with Drum brakes and want to change to a 1983 mini Truck front end with disk brakes.

Any one know if this will work?
Thanks Bic

 

[pb4ugo]

You should swap the knuckles and birfs and outer parts from the mini truck., and keep the 40's axle housing and larger 3rd member.

 

[406mud]

You should swap the knuckles and birfs and outer parts, and keep the 40's axle housing and larger 3rd member.

Do you think this will work? any difference in brake lines?

 

[pb4ugo]

Do you think this will work? any difference in brake lines?

It's done all the time. Search knuckle rebuild. Brake lines to the axle will probably have to be figured out. To start, go to FAQs at the top of this section and scroll down to frt ends.

 

[406mud]

It's done all the time. Search knuckle rebuild. Brake lines to the axle will probably have to be figured out. To start, go to FAQs at the top of this section and scroll down to frt ends.

OK thanks for your help
Bic

 

[greenbeasty]

One of the typical Cherry Popping projects for FJ40's, all the info you need is presented by the wonderful Cruiser Heads here!

 

[406mud]

One of the typical Cherry Popping projects for FJ40's, all the info you need is presented by the wonderful Cruiser Heads here!

Yes I have it figured out now. I have a couple of FJ40 underset tool boxes left.
Bic

 

[3_puppies]

you can also swap the disc to the Landcruiser vented disc and use either Landcruiser calipers or the V6 4 runner calipers?

any idea what year the axle is? 2 different versions of how the rotor mounts to the hub

you'll need an axle rebuild kit, get it from Landcruiser Brothers or cruiser outfitters, go with Marlin inner seals

 

[406mud]

you can also swap the disc to the Landcruiser vented disc and use either Landcruiser calipers or the V6 4 runner calipers?

any idea what year the axle is? 2 different versions of how the rotor mounts to the hub

you'll need an axle rebuild kit, get it from Landcruiser Brothers or cruiser outfitters, go with Marlin inner seals

Its off of 1983 Toyota Mini truck 4wheel drive

 

[cruiseroutfit]

Yes, it will absolutely work!

Do yourself a favor and go read this!

Tech Talk: Ultimate 40/55 Series Disc Brake Conversion Parts Thread (Work in Progress)

Skip anything that has you reusing course spline birfield outer axle and uses adapters to fit GM calipers and rotors. Like hard pass skip. These require you to re-use your course spline (low strength) outer birf joint and free-wheel hubs, both of which have no options for upgrades. If you have a...

forum.ih8mud.com

 

[Skreddy]

I have a 1972 FJ40 with Drum brakes and want to change to a 1983 mini Truck front end with disk brakes.

Any one know if this will work?
Thanks Bic

View attachment 3197321

Others already said but yep, works and not hard, especially after seeing the skills you have. My 70 non-resto thread has the exact swap in it. Can link it if you need but there’s better write ups out there.
You’ll want everything on the ends that isn’t part of the housing, as well as the outer axle (birfield). Brake lines are available and easily made if they don’t come with. Swap to 85 4Runner calipers and 60 series vented discs (if I remember right?). Worthwhile swap.


For clarification though: you want to swap the outers of the pickup axle onto your axle. You don’t want to swap the entire pickup axle into your 40.

 

[Jdc1]

I kept the ‘72 housing and swapped in 60 Birfs and Knuckles so I didn’t have to re route any of the brake lines.

 

[JackA]

 

[406mud]

I have a 1972 FJ40 with Drum brakes and want to change to a 1983 mini Truck front end with disk brakes.

Any one know if this will work?
Thanks Bic

View attachment 3197321

Well I'm in the middle of the swap and noticed the Mini truck Birfields are larger than the FJ40s. Can I open up the Axel ball so they will fit?
someone said this is possible

 

[77mustard40]

Search is your friend, the axle ball with need to be clearanced with a grinder to widen the opening. Lots of threads on this.

 

[406mud]

Search is your friend, the axle ball with need to be clearanced with a grinder to widen the opening. Lots of threads on this.

Obviously Im not good in the search dept
any help to a link would be appreciated.

 

[77mustard40]

Will 79-85 mini truck inner axles fit a 76-78 40 front end?

Looking to upgrade my front axle. Found a used package locally that includes a lot of high quality outer stuff (knuckles,spindles,aisin hubs, brake rotors and calipers) and is offered with cromoly birfs and factory inners for a mini truck. Will this work?

forum.ih8mud.com

just one of many

 

[ceylonfj40nut]

Use Google to search Mud. Mud search feature is not great

 

[406mud]

Use Google to search Mud. Mud search feature is not great

OK thanks

 

[3_puppies]

I was thinking in the FAQ at the top of the page:

Disk Brake conversion links

Mini truck disc brake swap information: Pro's and cons of mini disk swap. mini disk pro's and cons more minitruck disk swap discussion more disk discussion The pro's and cons of a commercial disk brake kit Vs minitruck parts commercial disks vs DIY mini disks tech Writeup on how to...

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