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Late version 1950s Triumph Pre-Unit Rigid Frame gearbox 500cc 650cc T910 with speedo drive.
Thunderbird, 6T, T100, 5t, Speed Twin etc, as long as they are the rigid framed variety. It will fit the 3T Deluxe too.
The main case has a cast number T910, placing it between from around 1950. The main gearbox casing has a number is 40205NA. Because of the speedometer drive, I believe this is a later version of the rigid frame transmission box. So, I guess it’s from around 1953-55.
This is being sold as a gearbox needing rebuild, as I haven’t touched it. It turns fine. But it will need to be taken apart, cleaned and re-assembled. Some parts have a very light amount of surface corrosion.
Condition of the 1950s Triumph Pre-Unit Rigid Frame gearbox
As mentioned, I haven’t taken it apart. It turns and makes the right “clicks”.
A few niggles are: There is a little bit of corrosion on the rear face of the lower mount. It’s not bad and the mount is very sound. In fact, both mounts are good and without the usual little chips and breaks.
The main case and outer cover do not have any weld repairs. However, the usual damage has occurred to the clutch adjuster on top the case. It’s not so bad that you can’t use it. But it could do with a repair.
As you can see from the images, there is no gear indicator needle or a cap on the outer cover. These are easily purchased.
Overall this 1950s Triumph Pre-Unit Rigid Frame gearbox is decent value for money.
Other early Triumph parts.
Occasionally, I have some Triumph parts. I used to have various pre-unit Triumphs and kept a stock of spares. They have slowly dwindled to a very small number. However, I get offered parts regularly. So, please get in touch and let me know what you need.
In the meantime, please browse the Triumph motorcycle parts
Buyer notes for the carburettor.
Shipping is charged ON TOP of the price for the item. There are too many variables to include shipping in the checkout, so please contact me before you buy and I will give you a shipping price.
I usually ship to most destinations.
International shipping available. Let me know where you are and I will send you a price for shipping with tracking
Combined shipping available.
Viewing: Please come and check it over before you buy. It is at PE28, near St Ives in Cambridgeshire.
Collection: If you don’t want it shipped, I have plenty of space. If you can’t collect for a while, it’s not a problem. However, I will need to be paid very soon after the sale. Thanks.
Payment: Good old fashioned money on collection is preferred. I can accept payment through PayPal or by bank transfer as well. I can accept EUROS. Please ask.
Import Taxes: Please note that IMPORT DUTIES are not something I can control. If you are buying from outside the UK, there is a chance that you will have to pay import taxes. Import taxes vary from country to country. If there are charges to pay, it is the buyer’s responsibility to research the cost and pay the duties. The price that you see on my advert is for the item and not the item plus whatever taxes might be due.
If you haven’t joined already, it’s worth joining the TOMCC, Triumph Owners Motorcycle Club
