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60 Drums to 80 Disc's
Posted: Sun Jul 02, 2006 4:30 pm
by Gumby
Hi guys...just having a think what maybe involved with bolting up rear 80 disc brakes to the rear of a 60 to replace drum brakes.
Has anyone done this...is it easy and straight forward...what is actually needed to complete the conversion.
Any help and or ideas, suggestions would be great.
Cheers...
Posted: Sun Jul 02, 2006 7:27 pm
by Ruffy
You need an 80 rear axle assembly.
I've got GQ discs and subaru calipers.
Posted: Sun Jul 02, 2006 10:26 pm
by vorno_18
if the tailshaft bolt pattern is the same id say get the whole diff assembly from the 80 weld the spring perches onto it off the 60 diff and bolt the whole lot up, would assume it would not be very hard if you can use a welder
Posted: Sun Jul 02, 2006 11:18 pm
by Gumby
I thought it may be as easy as changing the hubs and backing plates and stuff but if its too hard ill leave the drums in, they work well but just a pain for maint thats all
Posted: Mon Jul 03, 2006 8:48 am
by Ruffy
If it was that easy then every 40 and 60 getting around would be a disky one by now
If you put an 80 rear axle assembly in then its wider and ya wheels will hang out the gaurds.
Posted: Mon Jul 03, 2006 10:09 pm
by midi73
The reason that you cant do this swap is because the backing plate bolt patern is different. If it wasnt for this problem it would be an easy swap.
Posted: Mon Jul 03, 2006 11:13 pm
by bad_religion_au
there's a way to do it with 60 series front disks gumby
i know there is
Posted: Tue Jul 04, 2006 1:30 am
by Gumby
bad_religion_au wrote:there's a way to do it with 60 series front disks gumby
i know there is
Ahhh you are very clever bad_r..you are a mod ledgend...hand the man a 9''
I should have asked you first...next time i see you..you can fill me in fella
Posted: Tue Jul 04, 2006 9:58 am
by midi73
Fill us all in.
Posted: Tue Jul 04, 2006 5:23 pm
by Sixty
Yep, would like to hear how its done as well
Posted: Thu Jul 06, 2006 11:19 pm
by bad_religion_au
Posted: Fri Jul 07, 2006 7:44 am
by Sixty's Guy
Looks good. Ok for a 40 with hand brake on the transmission. You would need to work out a way to get a handbrake to work with the 60.
Posted: Fri Jul 07, 2006 8:33 am
by Ruffy
Sixty's Guy wrote:Looks good. Ok for a 40 with hand brake on the transmission. You would need to work out a way to get a handbrake to work with the 60.
Hence my GQ disc's with sooby calipers. L series sooby have h/brake working on front calipers so the lever pulls inwards, just like your drum set up.
Posted: Fri Jul 07, 2006 10:21 am
by midi73
bad_religion_au wrote:there's a way to do it with 60 series front disks gumby
i know there is
Oh that, I read it wrong. I have already done that. I thought you were refering to a way to do the brakes so you can put the 80 hubs on the rear of th 40 or 70 housing.
Posted: Fri Jul 07, 2006 3:52 pm
by Sixty's Guy
Ruffy wrote:Hence my GQ disc's with sooby calipers. L series sooby have h/brake working on front calipers so the lever pulls inwards, just like your drum set up.
Ho w about a complete write up and pics Ruffy?
Posted: Fri Jul 07, 2006 4:39 pm
by Sixty
Ruffy wrote:Sixty's Guy wrote:Looks good. Ok for a 40 with hand brake on the transmission. You would need to work out a way to get a handbrake to work with the 60.
Hence my GQ disc's with sooby calipers. L series sooby have h/brake working on front calipers so the lever pulls inwards, just like your drum set up.
Any reaon you used Pootrol rotors instead of Yota ones?
Posted: Fri Jul 07, 2006 5:41 pm
by Shadow
There are a heap of threads on this. There are several problems involved which are difficult to overcome which is why no-one has released a bolt on kit.
A smiple search will see you to a thread which contains a shitload of technical information which basically means for the conversion to be legel you need to match the rear calipers (piston capacities) to the master cylinder.
I think you need to use a 80 series master as the 60series designed for drums opushes too much volume to the rear, and then upgrade your front calipers to the larger 4runner V6 calipers aswell (to match the 80 series master).
there is no "easy" swap over.
Posted: Fri Jul 07, 2006 9:08 pm
by Ruffy
Sixty wrote:Ruffy wrote:Sixty's Guy wrote:Looks good. Ok for a 40 with hand brake on the transmission. You would need to work out a way to get a handbrake to work with the 60.
Hence my GQ disc's with sooby calipers. L series sooby have h/brake working on front calipers so the lever pulls inwards, just like your drum set up.
Any reaon you used Pootrol rotors instead of Yota ones?
Yep... because they were free:)
But apart from that, They fit straight over the wheel studs just like the drum does.
Posted: Sun Jul 09, 2006 6:57 pm
by Sixty
Ruffy wrote:Sixty wrote:Ruffy wrote:Sixty's Guy wrote:Looks good. Ok for a 40 with hand brake on the transmission. You would need to work out a way to get a handbrake to work with the 60.
Hence my GQ disc's with sooby calipers. L series sooby have h/brake working on front calipers so the lever pulls inwards, just like your drum set up.
Any reaon you used Pootrol rotors instead of Yota ones?
Yep... because they were free:)
But apart from that, They fit straight over the wheel studs just like the drum does.
Fair nuf.
Sooo...from there its just a matter of centralising the caliper and welding the bracket to the axle...
Posted: Sun Jul 09, 2006 7:27 pm
by Shadow
Sixty wrote:Ruffy wrote:Sixty wrote:Ruffy wrote:Sixty's Guy wrote:Looks good. Ok for a 40 with hand brake on the transmission. You would need to work out a way to get a handbrake to work with the 60.
Hence my GQ disc's with sooby calipers. L series sooby have h/brake working on front calipers so the lever pulls inwards, just like your drum set up.
Any reaon you used Pootrol rotors instead of Yota ones?
Yep... because they were free:)
But apart from that, They fit straight over the wheel studs just like the drum does.
Fair nuf.
Sooo...from there its just a matter of centralising the caliper and welding the bracket to the axle...
except the hole in the middle of a patrol disc is the incorrect size for the toyota hub and no engineer will ever pass it.
Posted: Sun Jul 09, 2006 8:31 pm
by Sixty
Shadow wrote:Sixty wrote:Ruffy wrote:Sixty wrote:Ruffy wrote:
Hence my GQ disc's with sooby calipers. L series sooby have h/brake working on front calipers so the lever pulls inwards, just like your drum set up.
Any reaon you used Pootrol rotors instead of Yota ones?
Yep... because they were free:)
But apart from that, They fit straight over the wheel studs just like the drum does.
Fair nuf.
Sooo...from there its just a matter of centralising the caliper and welding the bracket to the axle...
except the hole in the middle of a patrol disc is the incorrect size for the toyota hub and no engineer will ever pass it.
Too small...??
Posted: Sun Jul 09, 2006 8:43 pm
by Shadow
Sixty wrote:Shadow wrote:Sixty wrote:Ruffy wrote:Sixty wrote:
Any reaon you used Pootrol rotors instead of Yota ones?
Yep... because they were free:)
But apart from that, They fit straight over the wheel studs just like the drum does.
Fair nuf.
Sooo...from there its just a matter of centralising the caliper and welding the bracket to the axle...
except the hole in the middle of a patrol disc is the incorrect size for the toyota hub and no engineer will ever pass it.
Too small...??
i think the hole in the GQ disc is about 3mm bigger than the hub
http://www.outerlimits4x4.com/PHP_Modul ... =rear+disc
that thread has all the info