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DIY Classic Mini Gearbox Articles
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Need Your Mini's Transmission Rebuilt?
(Vintage Race Car Services)
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Need Your Classic Mini Transmission Rebuilt?
Here at Mini Mania we have several rebuilt gearbox options available for your Classic Mini. Let us put our many decades of skill and experience to work for you! Check out this inside peek at gearboxes waiting for you in our warehouse. Aren't they pretty?Browse our selection & find the perfect one for you. Questions? Call 1-800-946-2642 or email us.
Rod Change Gearbox 3.44 Final Rebuilt
4 Sync Remote Gearbox 3.44 Rebuilt
Rod Change Gearbox 3.1 Final Drive Rebuilt
Rod Change Gearbox 3.2 Ratio Rebuilt
Remote Gearbox 3.1 Ratio Rebuilt
Gearbox Related Articles & Videos on Mini Mania
G...
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GEARBOX - How they work
(Transmission)
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SHOP GEARBOXES and GEARBOX PARTS
GEARBOX - How they work
click on links for related images
Having decided on or even implemented a course of action to bolster the performance of your Mini’s engine, maximising it’s potential should encompass a good look at the gearbox. It rarely does, as most folk take one look at those seemingl...
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Classic Mini Cooper Primary Gear Parts
(Transmission)
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Primary Gear Parts for Classic Mini Cooper
If you're looking for Primary Gear Parts for your Classic Mini Cooper then you've come to the right place.
Here at MiniMania we carry all the top Primary Gear Parts for Classic Mini Coopers. Explore our inventory below!Shop ALL Fuel Filters Parts and Accessories HERE
Primary Gear Parts
/addProduct: 13H2934, 13H2934MS, 22A319, 22A323, C-STR122,...
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How do I know which transmission my Classic Mini has?
(Transmission)
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It’s really quite easy to tell which generation of gearbox, shift linkage, and axle your Mini has. Let’s say you want to order a replacement but terms like “remote”, “rod-change”, or “pot-joints” have you a little befuddled about just what the heck to order! Let’s very simply describe the three styles used in the production of...
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Magnetic oil trap, C-2A3637
(Engine Drivetrain Exhaust)
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Installation of this kit involves opening and re-sealing the oil suction passage. Improper sealing can result in low (or no) oil pressure and subsequent engine failure. Always observe the oil pressure warning light/oil pressure gauge when starting the engine after installation of the kit or re-installation of the magnetic plug after servicing to detect possible leakage. If oil pressure is not obta...
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GEARBOX - standard production gearbox types
(Transmission)
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I’m sure we’re all aware of Sir Alec Issigonis’ brilliant solution to the gearbox location in the Mini - just fold it up underneath the engine, simple. Following is a résumé of the production gearboxes to date.
The first Minis rolled off the production line with a three-syncro gearbox, first gear as explained earlier was still a hit and miss affair. The spee...
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Classic Austin Mini Cooper Final Drive ratio options
(Transmission)
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The final drive gears are ultimately responsible for the way your Mini goes after engine, gearbox, and under carriage tweaking has been applied. The aforementioned and the degree to which it has been done will affect the decision as to what FD is required. They’re also responsible for much discussion between many tuning freaks, and confusion to the less informed. There’s nothing weird ...
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Quick Shift Kit, Remote & Rod change, C-22A1750 & C-22A1751
(Transmission)
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REMOTE CHANGE
1. Remove original gearstick. Fit KAD Quickstick with original plastic collar, spring and spring retainer, grease well and refit with new spacer. Place flange downwards using longer 5/16" UNC capscrews.
ROD CHANGE
1. Remove original gearstick assembly and using molewrench, remove two dowels from top of diecast gearchange housing.
2. Fit aluminium bell to top of gearchange housin...
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GEARBOX - Up-rating drop gears
(Transmission)
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Terminology
Drop Gears - Transfer gears (primary, idler and input gears)
Large-bore - Refers to anything based on a 1275-type unit
Small-bore - Refers to anything based on 850/998/1098 units
The standard drop gears are fine for practically all road use - almost irrespective of power output. Despite what many folk believe - they are more than strong enough, and will perform perfectly well if co...
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GEARBOX - Syncro vs 'Dog' engagement
(Transmission)
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NOTE; A 'high' or 'low' ratio gear is in reference to it's performance, not it's numerical number. To illustrate - a 'high' FD ratio will give 'higher road speed', but will have a numerically low figure. A 'low' FD ratio will give lower road speed, but have a numerically high figure. A by-product of this will be reduced acceleration capability on the 'high' ratio, increased acceleration capability...
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22G2026MM Rod Change Shifter Conversion Bracket
(Engine Drivetrain Exhaust)
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Procedures
Align the holes in the red wooden locating blocks with the holes in the bracket and tape or glue the blocks to the bracket.
Attach bracket, with locating blocks attached, to the gear lever housing and raise the housing until the locators touch the tunnel. Drill two 5/16” diameter holes through the tunnel at the spots marked, using the bracket and locating blocks as guides.
Ma...
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Pros and cons of Limited Slip Differentials
(Transmission)
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Evo (Trannex)
1950s design with 1990s engineering and technology - originally done by the inimitable Davc Hirons at Trannex, now under the EVO banner at Mini Spares Centre following their buy-out of all the Mini/Sprite Trannex products some years back now. The only real similarity to the old Salisbury is the 'plate type' design - purely because it gives maximum frictional area, therefore most e...
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ENGINE TRANSPLANTS - gearbox information
(Transmission)
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A subject worthy of an entire book to explain the whys and wherefores, and also causes much consternation on the part of the transplanter. Much confusion’s spread over which gearbox has the best ratios, is best to use, and with which FD. For a detailed account on this and covering all gearboxes fitted as standard to the Mini, see the relevant separate articles 'Gearbox - Standard production ...
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Classic Mini Cooper Gearbox - Common sources of problems
(Transmission)
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Just like in engine building, a gearbox needs careful and proper attention when building it up. It isn't a difficult job, and most competant DIY mechanics can make a decent job of it. But, just like engine building, it's the knowledge of what to look for prior to and during the build that sets the 'professional' builders apart. Hopefully resulting in a more reliable, perfectly functioning unit.
&...
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Phantom Grip LSD Installation Instructions
(Engine Drivetrain Exhaust)
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PHANTOM GRIP LIMITED SLIP DIFFERENTIALCLASSIC MINI BASIC INSTALLATION INSTRUCTIONS
KIT INCLUDES 2 DISC PLATES, 4 GOLD SERIES SPRINGS, INSTRUCTIONS, AND 2 STICKERS
Click photos for larger image
STEP 1: TOOLS NEEDED: HAMMER, DOWELL REMOVER, WRENCH SET, TABLE PRESS, TABLE VICE AND TORQUE WRENCH
STEP 2: REMOVE STOCK DIFF FROM TRANS
STEP 3: SECURE DIFF IN T...
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Center oil pick-up pipe C-AHT54
(Engine Drivetrain Exhaust)
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FITTING INSTRUCTIONSOil pressure loss caused by oil surge can be experienced under hard cornering. To alleviate this it is essential to fit a centre oil pick-up pipe. Mini Spares' continual research and development program has seen advances in pick-up pipe design, replacing the original ancient design conceived by Abingdon ST some thirty-plus years ago. The finer gauze (as used in many oil systems...
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Quaife Limited Slip Differentials - Classic Mini Cooper
(Engine Drivetrain Exhaust)
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Mini Cooper Limited Slip DifferentialThe Quaife torque biasing differential enables your car to accelerate quicker and corner faster. How?
By getting the power to the ground!
The Quaife Differential powers both drive wheels under nearly all conditions, instead of just one. With an ordinary open differential, standard on most cars, a lot of precious power is wasted during wheelspin under accelera...
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PRIMARY GEAR - Bush problems
(Technical Information)
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Although not of immediate interest to many road-runners/street-burners, mainly accorded to the racing scene, it seems to be a perplexing problem to a very large number of folk around the world, and has burned up plenty of telephone time. Distilling the myriad of ‘the symptoms go like this’ descriptions down from various languages it has been put to me in – the end result was alwa...
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Mini Cooper Specials
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CK722A
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DAM4932
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MMKT0404
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CK953A
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JEP10008
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14A8308
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FZX1414-REB
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C-GBD496
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AN181T
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WZX1264
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RC40-057
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27H4775
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ABD36007
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C-ARA670
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27H6945
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HMP441001
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GB5000
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BMK1539A
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CK953P
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DAM6240
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DP3048K
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C-GRH469
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MSSB1109GREY
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GWC1131
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RC40-062
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