Club Triumph

Hi,

Does anyone know whether a gearbox from a 2500 saloon (MK prefix J type O/D) can be used in a TR4. Specifically:

Does the geabox bolt straight up to the TR4 engine or is modification required.
Are chassis modifications required?

Cheers
Terry

Hi Terry,
The gearbox casing and most of the innards are the same, but you'll need to change the input shaft  to mate with the flywheel and clutch.
The TR4 rear mounting is designed for the a-type overdrive, to work with a j type from a another tr would require chassis mods, a j-type from a saloon is a different matter as the mounting brackets are on the top not the bottom and some serious bodgery would be required.
As you need to strip the box anyway to change the input shaft, you'd be much better off using the 2500 box as donor box to repair your origonal one.

Hope this helps.

Keith

Thanks Keith,

Sadly I purchased this car as a stalled restoration project and the only item missing is the gearbox. I have both J type and A type O/d gearboxes salvaged from saloons - but not a TR gearbox and very little hope of getting one here (Australia) at a reasonable price.

In regard to the input shaft, could I get by using saloon/TR6 clutch and pressure plates plate or does the shaft have a differnt reach?

Cheers
Terry

Terry,
I expect it is possible to use the saloon clutch, although I don't know the technicalities.
The 6 cyl TR5/6 is the same clutch as the 4A which implies that it should be possible to use a saloon plate, although TR clutches can be troublesome anyway so I don't think it would be easy!

Cheers,

Keith

Using the Saloon Gearbox and associated clutch plate and release bearing will in all likely hood give a far more pleasant clutch than some / most TR's. The logic for the use of the larger diameter input shat on the TR's escapes me as I use the saloon shaft and have 190 bhp with no issues.

Andy,

I don't know if anyone has done this, so i would like to take this opportuntiy to welcome you to the forum. ;)

Good to see a fellow enthusiast from the other side of the world. ;D

Cheers,

As a englishman abroad I still have my little England in my garage... and they don't rust.
Hope I can add my knowledge and help people avoid too much pain in Triumph ownership.

Andy,

Aren't you the owner of 'The Beast'. The car that James Elliott used over here until recently and was used in the last 2 RBRR's. My vivid memory of the last RBRR was on the Highlands section near Altanhara and waking up and looking out of the rear window of my GT6 (My mate, Rich was driving!)to see 'The Beast' in hot pursuit!

Brilliant to think that in 7 or so months we will be doing the RBRR again.

Tim B

Not the owner but I have spent the last few times in the UK driving and mending the old thing... hope to be doing the RBRR again this year

So this must be you.......

Whoops