Best of both worlds - acceleration and easy cruising - with this Mini Spares Evolution five speed "closer ratio gearbox and cross pin diff".
Mini Spares Close ratio Evolution five speed "A" Plus Rod-change helical cut teeth gearbox has been in production for nearly 20 years with phenomenal proven reliability.
Suitable for 1275-1380cc(except extra boosted turbos) the strength of the helical cut gearbox is dependent on the torque capability of the original 2nd/3rd gears plus the final drive pinion and new 5th gear(i.e. 80-85 ft lbs of torque)
This gearbox was successfully used with an 8 port head and 286 camshaft in Keith Dodd's car and a 1994 Longman fast road engine apart from many others.
The gear case has extensive modifications plus 58 new linkage and gear modification parts.
It is fitted with a closer ratio gear set than the standard 4 speed gearbox by virtue of a redesigned laygear and first motion shaft which produce the following ratios-
1st gear 3.282
2nd gear 1.966
3rd gear 1.283
4th gear 1-1
5th gear is technically an overdrive gear and produces a reduction of .882 on the helical teeth gearbox with a new 3.444 final drive it gives a 5th gear ratio of 3.037. Using evolution Clubman gears the reduction is 0.865
Options with straight cut gears, Evolution cross pin diffs or limited slip diffs, are available to order.
Since the closure of Rover and the Power train production tooling being sold off we have to recycle many parts and apart from laygear and 1ST motion shaft which are different from the standard parts, the other New parts nearly always used are 1ST/2nd synchro, reverse gear, 2nd gear ,3.444 diff plus the extra 5 speed gears.
The Final drive ratio ratio is 3.444 with a close ratio box, so you'll have the acceleration through to fourth gear. . Fully assembled, ready to install.(Available in Rod-change only) Covered under guarantee for parts only with NO labour claim costs. Sold on an exchange basis with a surcharge of £150 refundable on return of old unit which must be A-plus and have an undamaged case and idler gear face