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DIY Classic Mini Gearbox Articles

Gearbox Kits Saves You Time and Money (Engine Drivetrain Exhaust)
Check Out Our Gearbox Kits That Saves You Time and Money   Getting your Classic Mini up to speed often requires work on your gearbox.  Whether it's minor improvements or a complete repair, doing the job right is essential.  That's why Mini Mania has created these Gearbox Kits.  We've collected all the parts you need for any Gearbox job and priced it so that it's more affordable than gathering and purchasing all the parts yourself. What could be better?   And as always, if you have questions, please give us a call.   Our expert staff of specialists will be happy to assist you and can be reached by phone at 1-800-946-2642 or through email.    Classic Mini Gearbox Kits From Mini Mania   /addProduct:MMKT003,MMKT006...
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GEARBOX - How they work (Transmission)
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)
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)
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)
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)
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)
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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Gearbox - Up-rating diffs and FDs. (Transmission)
Terminology - FD              - Final Drive/diff ratio LSD           -  Limited Slip Differential Drop gears - transfer gears (primary, idler, and input gears)   There’s a good selection of straight-cut final FDs available. Examine the FD table, and using informa...
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Quick Shift Kit, Remote & Rod change, C-22A1750 & C-22A1751 (Transmission)
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)
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)
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)
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)
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)
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)
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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Classic Mini Cooper Differential Parts & Starters.Generators - 45 (Classic Mini Catalog)
Find a Part No. in the catalog below.  -  Type or copy/paste it into the search box to find it on the website. If you would like to view this information in our complete color catalog- Click here This browser does not have a PDF reader installed. Please download the PDF file to view it: /Mini%20Mania%20Catalog.CW-Pinion.45.pdf...
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Classic Mini Cooper Straight Cut Close ratio Gears (Classic Mini Catalog)
Find a Part No. in the catalog below.  -  Type or copy/paste it into the search box to find it on the website. If you would like to view this information in our complete color catalog- Click hereThis browser does not have a PDF reader installed. Please download the PDF file to view it: /Mini%20Mania%20Catalog.Straight-Cur-Gears42.pdf...
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Classic Mini Cooper Transmission gearbox parts page 43 (Classic Mini Catalog)
Find a Part No. in the catalog below.  -  Type or copy/paste it into the search box to find it on the website. If you would like to view this information in our complete 84 page color catalog- Click here This browser does not have a PDF reader installed. Please download the PDF file to view it: /Mini%20Mania%20Catalog.GearBox-Parts.43.pdf...
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Classic Mini Cooper Transmission Bearings page 44 (Classic Mini Catalog)
@[email protected] Find a Part No. in the catalog below.  -  Type or copy/paste it into the search box to find it on the website. This browser does not have a PDF reader installed. Please download the PDF file to view it: ...
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Phantom Grip LSD Installation Instructions (Engine Drivetrain Exhaust)
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)
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)
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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How to install a Classic Mini Cooper Limited Slip Differential (Engine Drivetrain Exhaust)
Fitting a Limited Slip Differential into a Rod Change gearbox The factory Rod Change gearbox requires some modifications to allow fitting of a C-AJJ3387 LSD. Not only is the body of the differential itself much beefier than stock, the bolts that hold the ring gear to the diff will also run into the case.The stock case we started with in this instance was the DAM5627 - but not that all Rod Change ...
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Lowered Priced Transmission Parts (Engine Drivetrain Exhaust)
Lowered Priced Transmission Parts Here's our selection of transmission parts with new lowered prices. ...
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Need Your Mini's Transmission Rebuilt? (Vintage Race Car Services)
  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 yo...
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New design of C-AHT54 Central-oil pick-up pipe - the reasons why. (Technical Information)
Not necessarily true - just because it's all there's ever been doesn't make it the most proficient. To understand why, careful consideration of what’s been available is necessary. Examination reveals certain crucial observations. The standard pick-up pipe is renown for causing loss of oil pressure when encountering either tight/violent or long, sweeping, high-speed right hand bends. Simply b...
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PRIMARY GEAR - Bush problems (Technical Information)
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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C-AEA3240 - REPLACEMENT FULLY-FLOATING PRIMARY GEAR BUSHING (Technical Information)
  FOR 1275-TYPE PRIMARY GEARS ONLY  To eradicate the hassles caused by primary gear front bushing seizure/wear, this bush has been developed to be a straight replacement with no post-fitment corrective size machining required.   In race use, the bushing can become seized/partially seized on the crankshaft, spinning the bushing the primary gear journal and usually preventing gea...
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