The Group C cars have had an update, here:
http://assettomods.com/atcc-group-c-pack-v1-5/. The server's been updated. I dare say Group A will follow soon.
Notable changes: LODs, new 80's soft and medium compounds only, gear ratios changed.
Change log:
UPDATE – v1.5 – (19/08/2020)
**New car** Chevrolet Camaro
Ford Falcon XE
All cars updated:
Optimised / multiple LOD’s created for all cars
Physics rebuilt on all cars
brake tempreture added to physics
brake ‘glow’ added
Setup options limited
Gear ratios changed
Diff ratios limited to 3 options per car
Ride heights changed
Windscreen textures updated
Tire names now “ATCC GrpC” in car setup
Mazda RX7
– Sound changed
– wing fixed (no longer looks like glass)
– wing mapped for decals
– Berklee Exhaust livery added
XD
– Passenger seat added
– rear seat added
– Front seats changed to Red texture
– Windscreen banner added
– Drop tank mapped
– Bonnet panel mapped
– Bumpers mapped
Torana
– Passenger seat added
– Gear shifter added
– Windscreen banner added
– Tail lights now working
VH
– Passenger seat added
– rear seat added
– Center console added
– Windscreen banner added
XB
– Textures seperated from bumpers, chrome trim, grille inserts and undertray
– Roll cage texture seperated
– Passenger seat added
– missing Suspension nodes added (brake calipers)