You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "what kind of gearbox do rally cars use?" whose answer is sequential manual gearboxes.
Each document should contain about 30 words, and these documents should contain useful information.

Query: gearbox used in rally cars
Useful Output:

Doc 1: Short wheel base Audi Sport Quattro road legal rally car with sequential gearbox  Used Car Dealership full of WRC Rally Icons that ANYONE can
Doc 2: In this Rally 101 video, Hayden Paddon explains how a sequential gearbox works, how drivers use it, when they use the clutch,
Doc 3: look at the unique transmission systems used in these high-performance vehicles. We'll explain the concept of sequential manual
Doc 4: Hi guys! Are you wondering how to master MANUAL GEARBOX in rally games? Then this video is for you. Ken Block's GoPro Onboard Footage
Doc 5: A regular synchromesh gearbox effectively has cone-clutches on the front of each gear pair that “synchronise” the speeds between them and the shaft they locate