It’s out of a 1967 Triumph 2000.. and is the reason the car in question is sitting in my garage with its gearbox out. Some genius who shall not be named decided that furiously pumping the clutch after the car had been off the road for three years was a good way of unseizing the clutch disc. Unfortunately, due to the design of the early release sleeves, this can cause the slipper pads (the things that hold the fork into the slots in the side of the sleeve) to slip out completely, locking the sleeve wherever it may be.
The “fix” (aside from “don’t be an idiot with the clutch”), is to install the sleeve/bearing from a later mk1 / mk2 2000 – this uses square slipper pads that are much less likely to lock the sleeve up. They also don’t have slots for the pads – there’s a continuous ring round the sleeve. It’s a straight swap, but – somewhat obviously – requires the gearbox to be out in order to do it…!
