Transmission And Rear Axle

Questions are often asked about how well the Midget rear axle can cope with additional power.  The answer is that it depends on which part of the rear axle you are referring to! Our testing [...]

Halfshafts require good ultimate strength – which will depend on the both type of steel used and the design. The material strength is a similar issue to bolts: Mild steel bolts are like [...]

Care needed! When replacing the pinion oil seal you need to be aware that you could disturb the settings on the diff of some models. The reason for this is that the pinion bearings are set up [...]

Clutch drag is when the car will not engage gear properly without grinding the gears, especially in reverse. Generally, this occurs because the pressure plate is not retracting enough to clear [...]

It is not necessary to remove the brake backplate and seal housing from the axle assembly – simply withdraw the inner cone (on which the hub mounts and the seal runs) over the halfshaft. Do [...]

What does a Limited Slip Differential do? An LSD is installed to maximise wheel traction. These benefits are seen most readily in competition, particularly where the car is attempting to [...]

Sometimes doubt arises as to the diff ratio currently fitted to a car, as a significant number of them have had their diff ratios changed over the years.  Reasons include Deliberate modification [...]

Note: In addition to the changes below, cars with 3 bearing engines have a much smaller crankshaft spigot bush (5/8″ against 7/8″). As far as I’m aware, the only way around this [...]

Currently, the needles in the AAU3052 bearings are .004” undersized, which will result in incorrect meshing of the gears.  An alternative is to use needle roller 8G2404 in this application.  [...]

Introduction An overdrive is a two speed, electrically activated, supplementary gearbox which is attached to the rear of the main gearbox.  It was a popular period option which easily converted [...]