Restoring "Austin FX4" (Car Mechanic Simulator 2018 Mod)

The "Austin FX4" is an old-styled London Taxi. It was produced from 1958 to 1994. I thought it might be a good idea to restore it in Car Mechanic Simulator, seeing as someone recently created it in the Steam Workshop. Despite being a beautiful-looking car, I wasn't able to drive it because it decided to jitter around when I tried to test-drive at the abandoned airport. That sucked :/ I could only assume it was because the rims and tires I put on were incorrect (despite the fact you couldn't get rims or tires to be that thin in the game). Or it was just naturally buggy and didn't want to work.