Gearbox Internals

This kit can be used in A+ gearboxes or flywheel housing, or to repair a transmission case.

Split needle roller bearing, as used in classc Mini 4-synchro gearboxes beginning in 1968. Ref: AAU1815.

Main bearing that carries the first motion gear in the classic Mini 3-synchro gearbox case. Ref: 2A3709.

Large bearing that carries the first motion shaft in the gear case starting in 1968-on; made by RHP. Ref: ADU7619, ADU7619-RHP.

Large bearing that carries the first motion shaft in the classic Mini gear case starting in 1968-on. Ref: ADU7619, 22G848, ADU2468.

Small needle roller bearing inside the input gear of 3- and 4-synchro remote and magic wand gearboxes. Ref: CHM172, CHM0172, 88G409

Split-needle roller bearing as used under the 2nd and 3rd gears in 4-synchro transmissions starting in 1968. Ref: AAU1816, PTM0066.

These 1.375'' OD bearings are found in both the 1979-on classic Mini gearbox and the flywheel housing. Ref: AHU1707, TUK100320.

Bearing that supports the .75'' pin of the idler gear on 4-synchro transmissions up to 1979. Ref: 13H7848.

Laygear bearing, unique to Jack Knight and Swiftune dog-engagement gearboxes. Ref: CHM141JK, CHM141, CHM141SW.

Two of these are needed in 4-synchro laygears before 1979, and only one for later A+ gears. Fits first motion end of laygear. Ref: CHM141, CHM0141.

Small caged needle roller bearing, fits both ends of laygear on 3-synchro and 1st gear end of 4-synchro transmissions to 1979. Ref: 88G396, 88G0396.

Starting in 1979, the layshaft was revised and a new needle roller bearing was fitted at the first gear end. This bearing is also used on the end of the

Double-row ball bearing that supports the mainshaft in the center web of the gearbox. Ref: AAU1365.

Double-row ball bearing supports the mainshaft in the center web of the gearbox. Ref: AAU1365, AAU1365-RHP.

Three-synchro boxes from about 1964 to 1968 used 26 individual needles under both 2nd and 3rd gears. Ref: 22G149, 22G0149.

Early-style reverse gear bushing, for all classic Mini reverse gears 1959-2000. Ref: 2A3475.

Single bushing for reverse gear; fits 4-synchro gearbox. Ref: 22G825, TUJ10001, 22G0825.

Improved pipe that moves the oil pick-up point towards the center of the engine. Ref: C-AHT54, C-AHT0054.

Large circlip that retains the single roller main first motion bearing in place. Fits 4-synchro remote and rod change transmissions.

Circlip, or stop ring, around the AAU1365 double ball bearing on the mainshaft.

Internal circlip, locates the bearing in 3-synchro laygear. Ref: 22G278, 22G0278.

Retaining circlip for the reverse lever-to-case on remote shift transmissions.

Close ratio helical-cut gear set for A+ transmissions featuring the same ratios as the C-STN39 straight-cut gear set. Ref: C-STN48, C-STN38.

Straight-cut gearset for A+ gearboxes using the standard 1st and reverse gear. Ref: C-STN39.

Pre-A+ gear set includes both the correct laygear and the 18-tooth 4th gear/first motion shaft, which fit the small original 14mm mainshaft. Ref: C-AJJ4032, 22G1371, 22G1040.

Detent ball for gear synchronizing hubs in all classic Mini transmissions. Ref: BLS107, BLS0107.

This spring is found under the right-hand diff side cover of a rod change transmission; applies pressure to the detant ball that locates the shift selector rod.

Detent spring inside of synchro hubs in 4-synchro gearbox. Use six (6) per gearbox. Ref: 22G2262.

Copper washer for oil drain plug. Should be replaced every second or third oil change to help prevent drips. Ref: AED172, AED0172.

2.95 crown wheel and pinion set; reduces your RPM at a given speed, so will allow quieter and more economical highway driving. 20/59 tooth count

First motion, or input shaft, for 4-synchro transmission, including remote shift and pre-A+ rod change. 17 teeth. New old stock.

Gasket set for the 1980-on classic Mini automatic transmission. Ref: GUG708015TS.

Gear selector rod that protrudes through the oil seal at the rear of all rod change gearboxes; used. Ref: 22G1858.

Close-ratio straight cut gear set for the classic Mini 3-synchro transmission. Includes first motion shaft, 2nd and 3rd gears, and laygear. Ref: C-AJJ3371, M3SGK.

First/reverse gear, fits all 4-synchro gearboxes including rod change. Ref: 22G1096.

Second gear, for 4-synchro gearbox and early rod change. Ref: 22G1094.

Third gear, for 4-synchro transmissions. 21 teeth. Pre-A+ only. Ref: 22G1095.

Magnetic oil trap with filter that provides supplementary capture of metal particles before they go through the oil pump.

Developed in the UK by Swiftune and manufactured by renowned gear specialists Quaife. Dog-engagement gear set for rod-change transmission. Tall first gear for rolling starts gives you four useable gears

Dog engagement gearset for remote transmission. Tall first gear gives you four usable gears on the track. Includes special billet steel shift forks. Gear ratios are 1.692, 1.441, 1.197, 1:1.

24-tooth input gear for A-series 4-synchro transmission. Ref: 22G849, 22G0849.

Retaining nut that secures the input gear to the first motion shaft on all classic Mini models. Ref: 2A3548.

Standard ratio input gear for 1979-on classic Mini or Metro A+ transmission. Ref: DAM2925.

Rod change transmission pinion bearing support, recommended for very high output engines. Made by KAD. Ref: KAD007, 1011310, KAD1011310.

Replacement 3-synchro laygear, for use in stock helical-cut gearbox. Ref: 22G110.

Oversized layshaft bearing. Fits only Swiftune gear sets manufactured 2013 or later.

Unique-sized layshaft bearing to fit Quaife-manufactured dog-engagement gesarset.