New Fairey overdrive

[Defender Mike]

Hi ,
I fitted a completely rebuilt fairey overdrive yesterday . All new bearings shafts gears including the lay gear which I had made at a local gear cutting firm in Perth. We made a few modifications adding extra oil capacity byway of a can plumed into the sump plug and mounted at the same height using a hose. Took it for a test drive and it works great not to noisy and engages nicely. When I tried to disengage on the move it grinds I had to stop to disengage . Once disengaged no problem and the selector feels very positive it's definitely at full throw back. Any ideas on what could be causing this it may need to be run in a bit only done about 20 is so far. I am using the clutch as directed but was wondering if I need to blip the throttle when disengaging or some other technique to match the revs between the gears . It's mounted in my Series 1 109 ute.
Mike

[460cixy]

Can't help with the question but I like the catch can oil res :cool:

[incisor]

i have no such issues with my toro

seems like an odd issue...

[JDNSW]

Sounds like the synchro is not working too well. Could be incorrect assembly, needs to be run in a bit, or just trying to change faster than it can cope with - try pausing in neutral. Otherwise, just double declutch.

John

[dandlandyman]

My Toro has tired synchro rings so sometimes, if I mistime the changes, it can lock me out of the next gear. I have to go back where I was coming from and have another go. The whole unit is based on the Series 3 and Range Rover slow-synchro bits so I have to drive it with a little relevent respect.

Your catch-can sump thing is neat-ish but I'm not quite convinced on the pipe from the bottom of the O/D. It hangs down a bit too far for my liking, and if it cops a bash it could so easily drop all your oil in one hit. I know, it's not easy to score the ideal fittings all the time, but maybe keep an eye out for a banjo-bolt set-up as you can, and be mindful of the dangly bits if you're offroading.

I run my Toro without the lip on the big outer seal and without the entire inner seal. I decided to try it when I kept finding the O/D overfilling itself. It now shares oil with the transfer case without a problem. I am aware though, that should any bearings break up in the O/D they'll end up all through the transfer as well.

Dan.
69 2A 88" pet4 (still in disguise), 68 2B FC pet6 (still resting quietly), 74 S3 109" pet4, plus 26 other parts/project cars.

[Defender Mike]

Thanks fot the replays guys ,
I messages 107 Gus and he recommended adjusting the selector fork . I pulled the cover off and gave it a coupel of mill extra on the disengage side . It now works perfect. The lay gear I had made up is very quiet no high pitched noise at all. Just did a test drive using the OD like a splitter great on hills . :)
Mike

[Defender Mike]

My Toro has tired synchro rings so sometimes, if I mistime the changes, it can lock me out of the next gear. I have to go back where I was coming from and have another go. The whole unit is based on the Series 3 and Range Rover slow-synchro bits so I have to drive it with a little relevent respect.

Your catch-can sump thing is neat-ish but I'm not quite convinced on the pipe from the bottom of the O/D. It hangs down a bit too far for my liking, and if it cops a bash it could so easily drop all your oil in one hit. I know, it's not easy to score the ideal fittings all the time, but maybe keep an eye out for a banjo-bolt set-up as you can, and be mindful of the dangly bits if you're offroading.

I run my Toro without the lip on the big outer seal and without the entire inner seal. I decided to try it when I kept finding the O/D overfilling itself. It now shares oil with the transfer case without a problem. I am aware though, that should any bearings break up in the O/D they'll end up all through the transfer as well.

Dan.
69 2A 88" pet4 (still in disguise), 68 2B FC pet6 (still resting quietly), 74 S3 109" pet4, plus 26 other parts/project cars.

Banjo bolt yes that's the go good idea!

[chopper]

Cant see what the catch can does with only one pipe in the circuit

[gromit]

Cant see what the catch can does with only one pipe in the circuit

I thought the same thing. It increases the oil capacity so you have to lose a lot more before it causes problems, also easier to visually check oil level.
I'm not sure the oil will have any reason to move backwards & forwards through the pipe and heat transfer would be slow through the pipe section.

Mike, what's the drain plug thread ? I'll see what banjo fittings we have at work.

Colin

[Defender Mike]

:p
Cant see what the catch can does with only one pipe in the circuit
I have just increased the volume, of oil from .4 to 1 litre larger resivour means it takes longer to lose and doesn't get as hot .I contemplated putting a cooler and a pump but will see how this works for starters.
:)

[JDNSW]

From memory, 3/8" BSP.

John

[Defender Mike]

I thought the same thing. It increases the oil capacity so you have to lose a lot more before it causes problems, also easier to visually check oil level.
I'm not sure the oil will have any reason to move backwards & forwards through the pipe and heat transfer would be slow through the pipe section.

Mike, what's the drain plug thread ? I'll see what banjo fittings we have at work.

Colin

I will check the tread tomorrow and let you know. I doubt if the oil will move back and forth. I was just trying to increase the capacity . I could put a cooler in line and run a pump through the catch can and back into the casing through a tapped hole at oil level height . Finding a tiny little pump that didn't overfill the OD would be a problem. :)

[incisor]

glad to hear it was an easy fix!

you can get the alloy transfer case cover they use with the roamer drive as well and it drops the heat a bit.. stops a couple of weeps as well!

my toro pumps it's oil into the transfer case! bloody thing it is....

might try pulling the seals like dandylandyman

i thought i read they are supposedly making the fairy overdrives again from november this year, so all the parts will become available again...

[chopper]

so I take it that they all leak and you just have to put up with it, and the can is like a slow top up system , the sight glass is a good idea.

[Defender Mike]

Eventually they all leak into the transfer case mine hasn't lost a drop try now with 200 is and it's going well. I found a oil cooler laying around while cleaning up today and I'm thinking of adding it in between the OD and the catch can it will increase the volume even more and help cool it . I have noticed the OD does get quite warm. Trouble is finding a place to mount it so it gets flow through air but won't get a stick or rock through it. :)