"I am ordering from Norway. Dealing with Rimmer Bros is just as easy as doing so within my country!" Customer Comment

MGB Gearbox

The MGB used several gearbox variants across its 18-year production run (1962-1980). Early cars featured 3 synchro units, while models from late 1967 onwards received the stronger 4 synchro gearbox. We stock parts for both, plus the less common automatic transmission.

MGB Gearbox Components and Overdrive

Whether you need internal components for a rebuild or external parts like selectors and gaskets, we've got you covered. Adding or restoring an LH-type overdrive transforms motorway cruising and remains a popular upgrade for the MGB gearbox.

Keep your gear changes smooth and precise. Call 01522 568000 or browse our full MGB gearbox range today.

MGB Gearbox Assembly & Fixings - 4 Synchro

Most Items In Stock!

MGB D Type Overdrive Assembly - 4 Cylinder 3 Synchro

Most Items In Stock!

Manual Gearbox & Overdrive

Automatic Gearbox

Frequently Asked Questions

Are 3 synchro and 4 synchro MGB gearboxes interchangeable?

Not directly. They require different bellhousings and propshafts, though conversions are possible with the correct parts.

Do you stock MGB overdrive components?

Yes. We carry D-type units for 3 synchro cars (1962–1967) and LH-type for 4 synchro models (1968 onwards).

Can I rebuild my MGB gearbox myself?

Yes, with the right parts and a workshop manual. Pair new internals with a fresh clutch kit for best results.

Will worn synchros cause crunching gears?

Yes. Worn synchro rings are the most common cause of difficult gear changes in the MGB gearbox.