MGB w/ An R380 Transmission - Thread Size For Shifter Knob?

[BenJB]

I've been Googling this without any luck, does anyone know the thread size for the shifter/gear knob for an R380 transmission? I have one in my 3.5L Rover V8 MGB and the gear knob is in need of being changed. I've found some good options with the correct gate pattern but I have no idea where to start with the thread size!

Thanks in advance

[minorv8]

LT77 gearbox remote has supposedly 5/16 UNF thread,see https://rimmerbros.com/Item--i-GRID006111

Knob locking nut part no. https://rimmerbros.com/Item--i-NT605041

It ´s possible that R380 has the same. Easiest would be to remove the knob and check the thread. The box itself has a lot of metric threads,.