Gearbox [rebuilt & fitted]

As discussed in the last update the spare gearboxes I had amassed have now been rebuilt into 1 box and collected ready for fitting. The new baulk rings from Renault are now steel so hopefully will stand up to more abuse (or frankly just ‘use’ when it comes to these boxes!) than the older brass type.

So today the car was dropped off at Tech 1 Performance for fitting. As always great work again by the guys there, car flew home and definitely feeling like it it’ll prove to offer up some noticeable performance gains when I get chance to test it out properly. Which incidentally will be at Castle Combe this coming Monday 😀

CR box + Quaife Tech 1 Tech 1 TTV Flywheel TTV Flywheel

Gearbox and Differential

With the gearbox now suffering from the typical 4th gear syncro wear issue, it seemed a good opportunity to not only drop a Quaife ATB in there but also have a play with the final drive (FD) and ratios.

Replacing the FD with a 4.73 (15/71) from a TL4 021 meant I needed to consider ratios too, as 1st to 3rd on the stock 200’s TL4 031 would become too short with that FD. Therefore I have used a TL4 003 from the early 197 as this box has a longer 1st to 3rd that will stop those early gears from being too short. Also the 003 has the shorter 5th and 6th (which the TL4 024 from later 197’s does not), and when combined with the 4.73 FD will make for a much shorter setup that my stock 031 box 😀

Before (200 TL4 031 with stock 4.3 FD) and after (197 TL4 003 with 4.73 FD) ratios in the following image. New 6th gear will be as my 5th currently is!
Gear ratios Quaife ATB Quaife ATB TL4003 & TL4021