GEARBOX - Limited Slip Diffs; necessary parts for installation.

Fitting an LSD isn't as simple as replacing the diff cage unit. In all cases a certain degree of diff housing modifications is needed - material needing to be ground/filed away to provide clearance for larger diff housing cases and crown wheel bolts. Although it has to be said the Quaife diff is supposed to fit without these mods. I've never found that. The design and manufacture of the LSD to facilitate any other function other than that of a standard 'open' diff assembly precludes use of standard CWPs. So one suitable for an LSD is needed. Naturally Mini Spares/Mania supply these in an extensive range of FD ratios. The output shafts are also different. A much thicker spline type is used within the LSD assembly. Consequently a suitable pair of LSD-compatible output shafts are needed. Some folk still insist on running the archaic, power consuming Hardy-Spicer type driveshaft to diff joints - although this is the only real option for rallying unless a change in driveshaft assembly

Gearbox - Up-rating diffs and FDs

There’s a good selection of straight-cut final FDs available. Examine the FD table, and using information from

'Gearbox - Final dives, standard' and 'Gearbox - Formulae for car speed, etc.'

you can assess which would best suit your usage. Bear in mind that they’re noisy, make sure you select one that’ll fit your diff unit, and also consider that using drop gears will allow fine-tuning of the ratio where necessary. See

'Gearbox - Up-rating drop gears'

Gearbox - Up-rating diffs, FDs and ancillaries.

part numbers: C-BTA166, C-BTA167, DAM6624, BTA101, 2A7062, DAM5071, DAM6027, RPS1418, C-AJJ3385, C-22A1731, ...Read more

C-AJJ3385 – Twin Cross-pin diff assembly.

This differential unit incorporates a twin cross-pin assembly and four planet gears. The kit is made to accept standard production crown wheels and standard differential output shafts of your choice

HPS5 – IN LINE OIL PICK UP MAGNETIC TRAP WITH FILTERHPS6 – IN LINE OIL PICK UP M...

FITTING INSTRUCTIONS

Mini oil pumps are susceptible to premature failure caused by excessive large particle contamination of the oil, mainly metallic debris created by the gearbox. The situation is not helped by the oil getting to the pump before being filtered. Mini Spares has developed components to help minimise this problem, including these in line magnetic oil traps. Their design allows easy fitment, as the adapter simply replaces the standard oil pick up pipe blanking plate on the back of the gearbox. It’s position in the oil supply gallery necessitates frequent removal of the trap to clean collected particles out, more so for the filtered version. Failure to do this will cause premature failure of the pump and possibly engine bearings.

There are no hard and fast rules for this periodic maintenance as vehicle usage will determine debris build up. Obviously a carefully driven road car will not need as frequent attention as a race car. Certainly clean it at e...

IMPORTANT NOTES ON FITMENT OF ULTIMATE GPA DRIVETRAIN - C-BTA1270

Fitment of the Ultimate Drivetrain Kit is as Cooper ‘S’ Drivetrain assembly except for the following points:-

1 When fitting driveshaft to CV joint it is always advisable to Tig weld CV joint inner race to thick circlip in two places.
2 When installing large alloy side covers please ensure a flat and spring washer are used in conjunction with 5/16 unc x 11/4” bolts, so as bolts do not bottom out in gearbox casing
3 When connecting Hardy Spicer joints to output shafts using 3/8 unf bolts, a small amount of grinding will be needed on one of the bolt flats to enable location and locking on to output shafts.
4 Before sliding driveshaft into Hardy Spicer coupling ensure splines of both are thoroughly oiled and greased.
5 Centralise steering rack and set up steering geometry
6 After installation of kit remove suspension units and CV joint nuts and move suspension through full bump (ie up) and rebound (ie down) and check that in both p...

Evo

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 (www.minispares.com) 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 effective performance.

Historical Article - Nov 1991 - A SERIES EVO L.S.D. Part 2

The cases are machined from steel billets, and all components manufactured to exacting specifications from high grade materials. On the road tests have proven that the bevel gear and plate pack are capable of absorbing 230lh ft of torque in front wheel drive applications. The cross pins are much more substantial than other types.

Historical Article - Nov 1991 - A SERIES EVO L.S.D. Part 2

The cases are machined from steel billets, and all components manufactured to exacting specifications from high grade materials. On the road tests have proven that the bevel gear and plate pack are capable of absorbing 230lh ft of torque in front wheel drive applications. The cross pins are much more substantial than other types.

Historical Article - Nov 1991 - A SERIES EVO L.S.D. Part 2

The cases are machined from steel billets, and all components manufactured to exacting specifications from high grade materials. On the road tests have proven that the bevel gear and plate pack are capable of absorbing 230lh ft of torque in front wheel drive applications. The cross pins are much more substantial than other types.

Historical Article - Nov 1991 - A SERIES EVO L.S.D. Part 2

The cases are machined from steel billets, and all components manufactured to exacting specifications from high grade materials. On the road tests have proven that the bevel gear and plate pack are capable of absorbing 230lh ft of torque in front wheel drive applications. The cross pins are much more substantial than other types.

Historical Article - Nov 1991 - A SERIES EVO L.S.D. Part 2

The cases are machined from steel billets, and all components manufactured to exacting specifications from high grade materials. On the road tests have proven that the bevel gear and plate pack are capable of absorbing 230lh ft of torque in front wheel drive applications. The cross pins are much more substantial than other types.

Historical Article - Nov 1992 - Little Red Booster 2

A strange choice, you might think, for inclusion in Mini Tech News but, surprisingly the GTM has more Mini parts on it than the Elf! (because the Elf is nearly all space frame).

Historical Article - Nov 1992 - Little Red Booster 2

A strange choice, you might think, for inclusion in Mini Tech News but, surprisingly the GTM has more Mini parts on it than the Elf! (because the Elf is nearly all space frame).

Historical Article - October 1993 - Mini Spares Centre News

Mini Spares Centre News For some reason, discs (brake rotors for the foreigners amongst us!) for the 'S'/early GT have become more and more difficult to come by. Well, actually, that is not totally accurate. I guess that statement should read "decent quality discs". I know there is a supply of, erm, EEC country manufactured discs purporting to be high quality, but they are extortionately expensive, and are only totally (?) effective...