Hi of course. I also feel this could be more diff related, I‘m not very clued up when it comes to diffs, I‘ve had true oem ones in the DC2 and DC5 and had a number of other updates played diffs etc on other cars but I wouldn‘t say I‘m able to advise when it comes to discussing them as I keep away from gearbox work etc.
If however you‘d ay the box has had work then maybe the diff was changed and if so and not maintained (regular diff oil changes) then maybe the diffs knackered or if it is an oem diff then maybe even that‘s knackered or something.
With regards to setup I have as follows (could always check my build thread to be sure I‘ve not missed anything):
Superpro caster correction bushes
Brand new oem top mounts
Bilstein B16 PSS9 Coilovers
- Spring rates: Front 10.70 and Rear 12.75 Kgf/mm
Camber is -2.5degrees front and -2degrees rear
Toe is 1 degree toe out front and 1 degree toe in rear
Suspension height slightly differs (not noticeable by eye) but I had the car fully corner weighted and setup to be ready for just me on track with fuel etc, so the cars set to level out and each corners suspension set to take the required weight under hard driving conditions.
Do you know what your current setup and settings are? I‘d be looking for signs of a diff change now as if you have tried most things then it‘s deff one thing that can impact on the cars drivability.