Drums to Disc information needed

[love2fly]

I am working on a complete frame up on a RHD 1982 FJ45 from Australia.
The frame is my main focus at this time along with the axles and such.
I am considering removing the front brake drums and replacing with discs from a FJ40. Being a RHD I really do not see any problems with this conversion using parts from a USA FJ40 unless someone on the MUD web can point out some possible areas of problems/considerations such as master cylinder change or ?. Also what year FJ40 can one use front discs from on a 1982 FJ45, 1975-19 ?.

Thanks in advance

 

[tornadoalleycruiser]

I would treat this exactly like any pre-76 FJ40 front wheel drum to disk conversion with the exception that you might actually be able to re-use your existing birfields, lockouts and perhaps you will end up with large pattern knuckle arms that you could re-use and not have to shim or swap knuckle arms.

 

[love2fly]

Excellent, that's more than what I was thinking I could use. So a 1976 on up disc's would be a good candidate for this project.
Thank you for your time.

 

[tornadoalleycruiser]

I would recommend later big knuckle pattern if possible minitruck with new lc rotors and calipers to keep your bigger pattern knuckles and also because 76 77 had a slightly longer birf which wont allow you to reuse your extras.
But yes they will all go on your axle

 

[tornadoalleycruiser]

Or 79 and later cruiser

 

[3_puppies]

I would recommend later big knuckle pattern if possible minitruck with new lc rotors and calipers to keep your bigger pattern knuckles and also because 76 77 had a slightly longer birf which wont allow you to reuse your extras.
But yes they will all go on your axle

Or 79 and later cruiser

being he has an 82, even tho it's from overseas, doesn't it still have the bigger knuckle pattern?

so wouldn't he just need, knuckles, spindle, rotor, hub, caliper and backing plate?

 

[DanS HJ-45]

being he has an 82, even tho it's from overseas, doesn't it still have the bigger knuckle pattern?

so wouldn't he just need, knuckles, spindle, rotor, hub, caliper and backing plate?

My late model drum axle has large pattern knuckles. So I'll bet he does too.

Dan

 

[love2fly]

Posting update

Okay since I posted this last I got side tracked on other things but now full circle to the start. I have been in contact with a few of you about this, and Dan (thanks) has done this with a newer rig that had drums and has given me some grate info, same with 3_puppies. I have had a few folks say due to it being a RHD rig I need RHD parts, I can't believe that, but this is my first so one never knows. So now that I am getting serious on completing this I thought I would put up a ink with a few pictures of what I have. Also I have found a ton of Toyota PU 4x4 axles on the web so I am considering using parts from them. I still Like to use the 60 parts but very few parting out axles. $100 was the best on a PU for just the L/R side knuckles out. I did a complete build on my drum knuckles and know that the wheel bearing, and upper/lower knuckle bearing, will fit a 60 knuckle but will they fit a PU ? Like to swap them with only 200 miles on them.

Thanks in advance


https://picasaweb.google.com/112044...rFrontBrakeDrum?authkey=Gv1sRgCPHf6PDb_4bUSg#

 

[3_puppies]

I thought the only difference for RHD is you need a RHD tierod kit versus a LHD kit.

If going with mini stuff, you end up with solid rotors, you can swap them out for vented rotors, you then need to swap the calipers to fit the vented rotors. I think the spindle hub assembly is the same, mini to 60 series.

 

[tornadoalleycruiser]

Spindle is same mini and cruiser.. Rotors and calipers are cheap. Should be no difference in steering arms just use yours. We can walk u thru it. Get those mini knuckles and lets get u stopping easier. You should have large pattern knuckles with that vintage. Will need to remove the residual spring out of the master circuit for the front. Get the parts and a knuckle kit from a vendor and go. Will take you longer to clean the parts than put them on.

Sent from my phone using IH8MUD

 

[love2fly]

82 drum to disc

3_puppies, I agree with you on the only thing is the tie rods. I have crawled under the rig and looked as best as I can, and I really see know difference other than the tie rods. These RHD Toyota's are coming into the US on a steady wave due to the hardship of finding newer FJ and HJ in the USA and with them they bring these kind of questions. We are so use to working with the older 40 series with the drum to disc that when a non US model shows up that usually would be stock with disc brakes the thinking changes. This probably will be asked again by someone with a troopy from OZ or anothe FJ45, I do hope they run across this posting.
3_puppies PM me when you can on the 60 unit.

I did some leg work and compared parts with 40 and 60. I could not find a 62 but I am sure they are the same.
Not going to beat this to death, I would think the conversion of a RHD with LHD parts is good to go.
tornadoalleycruiser-3_puppies-DanS HJ-45
Gentlemen thank you, lets party
Happy new year you.






1982 FJ45 RHD Front Drum to Disc Conversion using 1980-85 FJ60 parts


SAME FJ60 parts using FJ45 part numbers to compare.

FJ45/FJ60 Wheel bearing and race - same. inner-90368-49084 0ut- 90368-45087

FJ45/FJ60 Knuckle Bearings upper and lower -same. 90366-17001

Knuckle bearing shims - same. one side used for ref. 43233-60011, T=0.2

Outer axle Shaft birf *L/R - same. 43405-60015.* FJ60s from 80-85.
85-last 60016 not same.

Inner axle RH - same, 43411-60020




NOT the same FJ60 parts numbers using FJ45 part number.

Spindle FJ45-43401-60012

FJ60-43431-60012

Knuckle Arms FJ45-RH-45611-60022, LH-45612-60022

FJ60-RH-45611-60040, LH-45612-60040

Knuckle Housing FJ45-RH-43211-60040, LH-4312-60040

FJ60-RH-43211-60050, LH-43212-60050

Inner axle, LH FJ45-LH-43412-60020

FJ60-LH-43412-35010

Hub, axle FJ45-43511-60012

FJ60-43502-60020

 

[tornadoalleycruiser]

Your over analyzing this. Your steering arms have a smaller taper than the 60 stuff. But with that vintage of 40 have the large knuckle pattern so they will go directly on the 60/ mini knuckle. I have not had my hands on a set of hubs off later drum axles so have no idea on them. So use the aisins off the donor. They might be the same i just dont know. Just treat this as any disk brake swap with the bonus u will have spares left over. Really it will take you longer to clean than assemble. One bit of advice try and get the marlin inner axle seals with whatever knuckle kit you order. Just order large knuckle kit. Aka 1979-1989 landcruiser and 79-85 minitruck

Sent from my phone using IH8MUD

 

[love2fly]

tornadoalleycruiser, thanks I am now schooled in the arts of the RHD vs LHD disc conversion. I just treat everything like a aircraft build, if you don't know find out before you act.
I will post again on this thread the outcome of the RHD conversion if there is a snag in doing one. More RHD are rolling into the USA yearly might be of a help.
On the kit, I have dealt with Marlin off road on parts before and they have some great items, better than most, and probably will follow your suggestion on that.
Well with that said I think its time to take my better half out and say good-by to last year, you have a good one. Stay safe.

 

[Lupdog]

I had an '82 fj45 back in the day that I had changed from drums to discs. (Aussie RHD here). I didn't do the work myself so i cant comment on the specifics but IIRC the "new" parts came from a 70 series.

 

[love2fly]

70 series

Interesting to know. Any idea what year 70 it came from.