Triumph 2000 gearbox

[ronhatch]

Hi all, I am thinking of fitting a triumph 2000 O/D gearbox to my TR4, has anybody got a photo/drawing of the bracket needed to adapt the rear mounting?

Regards

Ron

[Lebro]

They are available from TR shop etc.

Bob

[ronhatch]

thanks for the reply Bob but I heard they are quite expensive .

Regards

Ron

 

[Lebro]

Other things to consider, the rear flange on the box has the wrong hole spacing to fit the TR propshaft. The speedo drive is a 3.5:1 reduction  whereas the TR setup is 2.5:1, so speedo will read slow. Finally the clutch is different, but simple fix is use the 2000 friction plate in the TR cover plate. The overdrive is not as strong as the TR one, & so is only used on 3rd, ,& 4th gear.

Bob

Edited February 6, 2024 by Lebro

[ronhatch]

thanks Bob for the info

regards

Ron

[Lebro]

Just though of something else.

If you existing clutch cover is the coil spring type, then either the release mechanism in the gearbox will have to be changed to match, or, you will have to fit a diaphram clutch cover to suit the gearbox. This latter option will mean re drilling the flywheel as the holes are not in the same place.

An alternative to using an adaptor mount for the overdrive would be to have it re-built with the correct rear casing. These are used on TR's & Healey 3000's

My local gearbox specialists (Hardy Engineering) rebuilt mine (I have a 2000 box in my TR3) with the 3000 rear casing, & also added parts to bring it up to TR spec.  They did not change the speedo drive (I guess they could have done) so I had to modify my speedo to read correctly (another story !)

Bob

[ronhatch]

Hi, Bob ,thanks for the reply, I intended changing the original gearbox as it rattles in second and third and I have the 2000 O/D box. But looking at all the modifications I wonder if its worthwhile repairing the original, it rattles but doesn't crunch so I was hoping it could be the detente balls and springs. any thoughts would be appreciated.

Regards

Ron

[Lebro]

If your original box is an overdrive one  swap the TR overdrive onto the 200 box, & swap the clutch release mechanism, & use T2000 friction plate in original clutch.

Bob

[ronhatch]

Th e original box has no O/D

 

[BlueTR3A-5EKT]

On 2/6/2024 at 9:38 AM, ronhatch said:

Hi all, I am thinking of fitting a triumph 2000 O/D gearbox to my TR4, has anybody got a photo/drawing of the bracket needed to adapt the rear mounting?

Regards

Ron

What Moss offer.

https://www.moss-europe.co.uk/overdrive-conversion-brackets.html

 

Do you know if the 2000 gearbox has A or J type overdrive?

Is that gearbox ok?

[ronhatch]

Cheers Peter , it is a J type and I have bench tested and it is OK

Regards

Ron

[BlueTR3A-5EKT]

You could ring Pete Cox Sportscars.   They will know exactly what you will need.   https://petecoxsportscars.co.uk/
 

 

[ronhatch]

Hi Peter , I took your advice and phoned Peter Cox, he was very helpful and gave me a few things to check and to try that might eliminate or at least subdue the rattle. 

Regards

Ron