48. Winter Upgrade Plan and Another Broken Gearbox

Time for the winter upgrade posts! Will break the next posts down into the following:

• Another broken gearbox (this post)
• Pedal Box / ABS
• Radiator / front bumper beam
• F2000 Dry Sump
• ITBs / Wiring looms 
• Battery / Mapping

So as expected at Donnington, the exact same issue as the last gearbox, the gripper final drive crown and pinion had destroyed itself. Whether the casing had an issue with it post the first failure we don’t know but this one didn’t last long at all. It did 2 trackdays, 2 test days and 2 race days. 
These are some pictures whilst taking it apart before it went off for a rebuild. This time we have rebuilt it with a new casing as the last box ended up having a crack in it.

 

The gearbox oil filter had done a brilliant job at catching the finer parts with the larger chunks stuck in the drain line/oil filter feed line. 
Last chance for the JC5 and gripper combo, if it goes again will have to have a rethink what goes in next.
Next post will be about the pedal box and ABS system.