Neils74, I would run a softer compound tyre on the rear. When we run sweeps, 40 or 33 on the front we use sweep 25 on the rear. If the rear end is stepping out then you have too much front grip and not enough rear grip. I only use 300 000 or 400 000 wt oil in my TOP racing oil gear diff.

You can use a harder front spring, softer rear spring, make the car wider at the front and narrower in the rear, (using 6mm hex and spacer on the front and 4 or 5mm hex rear), lessen the rear camber .

You need to try the tyre change first, then these other suggestions.

I have been using Ride Inch ups and decided to run Sweep 33 front and Sweep 25. All I changed on mysetup was my ride height and drove the car a little differently. I changed no settings in my radio and car was still fast and no traction rolling.

I run mwb configuration using the Blitz VWGTI body with no wing. I am currently using the 1 degree alloy bottom plate with 1 degree rear alloy hubs. 5mm hexes all round. 35 wt oil front and rear, three hole pistons. My shocks are built as per m chassis trf instructions. I do not use the droop screws.

I run negative expo on my radio, -25 for steering. I can push my car very hard without traction roll issues.

Anyway, good luck,

Regards,
Calvin