I have been reading the dvla's website and its says you need two things ie engine and gearbox, however, how do you prove the geearbox came out of the donor car? ie engine is easy as the number is in the log book, etc, but how do you prove the gearbox came from the donor if its not on the V5?

If that makes sence

Thanks

Phil

As long as it's the right type it doesn't matter. Axles and steering gear count to the total points as well if you're after an age related plate.