J Type Overdrive Service

[Steve P]

Good morning Gents,

I've got the overdrive out at the moment. I was considering replacing the the main gaskets. However before ordering the materials I was wondering if it was worth changing O rings as well and whether it was worth checking out the clutch for wear etc. In other words performing a service rather that a general overhaul.

 

Advice welcome.

 

Thanks

Steve

[AlanT]

Do not even think of refitting this without dismantling and checking everything. Not unless you know the service history.

 

There will be partly blocked oil ways, tired seals, worn thrust bearings, tired tail-bearings.

And the friction linings will be half-way through.

 

Or somebody recently fixed all this, but you don't know this maybe.

 

These are quite small for the job they do and some of the bits are only just big enough to do the job.

 

If somthing breaks, something small like a circlip, it can do a lot of damage.

[Steve P]

Good evening Alan,

Thanks for the comments. Looks like a full strip down is on the cards.

 

Cheers

Steve

[Richardtr3a]

There is only one specialist for the Overdrive refurb.

 

Overdrive Repair Services, Sheffield

 

They are specialists and will use test bed for final adjustment.

 

Take them the whole gearbox and o/d and you will have a major source of worry removed from your list

 

Alan is quite right. I had an o ring problem, now solved.

 

Good luck

[AlanG]

Or O/D Spares in Rugby. No connection just a satisfied customer.

Alan.

[Steve P]

Good morning,

I'm looking for advice on how to oil up the overdrive unit. There appears to be two parts to it.

 

1. Oil up the assembly via the gearbox.

2. Oil up the solenoid side. How do I do this bit? Its not very clear in the book. How much oil is required? And what sort of tool s required?

 

Thanks Steve

[peejay4A]

Gearbox and od share the same oil. You fill both at the same time through the gearbox filler/ level plug. I can't recall the capacity atm. A 7/16 8 point socket is a safe way of removing and replacing the filler plug.

Edited August 6, 2016 by peejay4A

[TriumphV8]

There are many people in the world who do a proper Job

on the overdrive and in many cases the OD does not

even need to leave the car for.

 

Here in Germany is Volker Herrmann, well reputed to do best work

and I myself did a swap from 4-speed gearbox to OD box by the

help of the Volvo OD including add or change of all the requiered

parts including a full check and overhaul.

 

So its no magic, just to do proper work and make no mistakes.

 

Oil is filled into the gearbox to the level, than box turned OD downside

and back and checked and refilled again where I like to cheat a bit a

and fill 200 cc more into it to be on the safe side........

 

There are special laser cut wrenches for the plug availiable, cheap

and also suitable for the motor oil plug.

Those plugs when out can be cut down to 3/8 size and than torqued

with a 3/8 nuts set, where at the end a 10mm nut and a allen key can

be used. Has the advantage that the oil level can be controlled inside

the car with the hole in the tunnel and refill is possible from there.

Edited August 6, 2016 by TriumphV8

[peejay4A]

If you don't want to take the gearbox and od out to turn it upside down just take your time filling them then go for a short drive, od in and out a few times. Then let things settle for an hour and recheck the level. A hole in the tunnel cover plugged with a floor grommet makes it easy and if you use an 8 point socket with a short extension it's a piece of cake.

Edited August 6, 2016 by peejay4A

[astontr6]

Hi Steve,

 

As already stated send your O/D & Gear Box Unit to some one like ORS. It is a specialist job and after they have re-coned the O/D they then put it on their test rig and check the pressure settings. They also re-con gear boxes and have the lay / gear shaft removed. Ask them to do their triple bearing conversion, as an extra,( under £100) this was a BL mod for Police 2.5 PI's and a production mod for Stags. Extends the life of this component by 1000s of miles, as it is known as a TR weak point.

 

Bruce.

[graeme]

If you don't want to take the gearbox and od out to turn it upside down just take your time filling them then go for a short drive, od in and out a few times. Then let things settle for an hour and recheck the level. A hole in the tunnel cover plugged with a floor grommet makes it easy and if you use an 8 point socket with a short extension it's a piece of cake.

 

+1

 

Cheers

Graeme

[dingle]

The Buckeye tech articles have a lot of good info on servicing the J type OD. http://www.buckeyetriumphs.org/technical/jod/JOD1/JOD1.htm

 

Berry