if possible take a picture of the car, going to be semi difficult to identify a car by a spur gear as there were so many and so many that were similar but different.
Looks to be a Smartech Winner variant, possible pro or sport.
i was able to find the manual for the buggy version, which from what i can tell has mostly the same parts, id count the teeth and compare to the buggy manual.
you might have better luck finding a manual for the car version.