Speedo spindle wheels and drive pinions by Keith Dodd. (originally dated 2015 on AKM2 page 121 update and checked again 2019) I have played about with well over 100 old and new samples of speedo drives from the Mini and Metro, of which I have kept one of each for reference as many are No […]
- Mini Spares
Posts in Gearbox
The X-pin concept grew out of development work carried out by David Hirons in the mid Eighties to resolve the problem of persistent diff bevel gear and carrier failure on rear wheel drive Ford Escorts and Lotus Cortinas. The torque capacity of the diff could be increased by adding two extra bevel gears. The cross […]
Any straight cut or helical competition gear set needs to be assembled by a trained mechanic and adhere to the following. Never fit lock tabs to the mainshaft and 1st motion shaft. Clean the threads on both, plus the internal nut threads with Loctite 7063 cleaner or brake fluid if not available (not petrol or […]
The world famous 5 speed close ratio gearbox design project was engineered for Mini Spares by David Hirons. Using over 58 extra parts plus extensive machining the 5th gear is technically an overdrive gear 0.882-1 which equates to 3.037 when using 3.44 crown wheel and pinion. The closer ratio is suitable for 1275-1380cc except Turbo […]
Laygears identification A type-Fixed Cone synchro type fitted until 1962 2A3705. 850cc 22A350. 997cc Cooper A type gear teeth profiles on A type mainshaft 22G70 loose baulk rings 22A381 850cc 22G76. 997 Cooper-production ended Sept 1963 22G83. ADO16-1100/ 948 & 1098 morris minor A type teeth profiles to fit B type mainshaft 22G392 and 1st and rev gear 22G197. 1070 S. (1047 cars) […]
Over the last few years we have developed this gear kit to be the ultimate for the rod change gearbox! Although there are many advantages to using a straight cut gears, often their disadvantages outweigh the advantages. The gear whine can be tiresome and annoying on drives any longer than 10 to 15 minutes.In the […]
Competition Gears and baulk rings/Straight cut and Performance gearbox assembly. Any straight cut or helical competition gear set needs to be assembled by a trained mechanic and adhere to the following. Never fit lock tabs to the mainshaft and 1st motion shaft. Clean the threads on both, plus the internal nut threads with Loctite 7063 cleaner […]
Straight Cut Gears Remote Type St Rod Change Pre-A+ Rod Change ‘A+’ Part Number for Kits C-AJJ4014 C-STN76 C-STN77 1st motion pre ‘A’ plus, 19 teeth C-22A1732 C-22A1732 1st motion ‘A’ plus, 19 teeth C-22A1732A 3rd Gear, 22 teeth C-22A1733 C-22A1733 C-22A1733 2nd Gear, 25 teeth C-22A1734 C-22A1734 C-22A1734 1st Gear, 29 teeth C-22A1735 C-22A1735 […]
Evo (Previously called Trannex)1950s design with 1990s engineering and technology – originally designed by the inimitable Dave Hirons who started Trannex, this is now under the EVO banner at Mini Spares Centre (www.minispares.com) following Mini Spares financing and buy-out of all the Mini/Sprite Trannex products some years back now. The only real similarity to the old Salisbury […]
21/09/2009 Your 5 speed gearbox has a special 5th gear, laygear, and reverse idler shaft assembled with a modified gearbox main case and a different speedo end casting. These parts must be removed before the main gearbox cluster can be removed. When a clean work area has been prepared, the removal of the 5th gear […]