Complex sentence: Other chassis parts, the transmission, the differential, the brakes and the steering unit have the original 1934 outward appearance, but more modern internal parts, providing the original look with a more up-to-date performance.
Split into simpler sentences: Other chassis parts, the transmission, the differential, the brakes and the steering unit have the original 1934 outward appearance, but more modern internal parts. This provides the original look with a more up-to-date performance.