6 Speed transmissions in the 225bhp and 5 speed in the 180bhp.

Ratios for the 5 speed,
1st 3.417
2nd 2.105
3rd 1.429
4th 1.088
5th 1.097

Found this info in a book by Laurence Meredith primarily written about the Audi quattro, the TT got a mention towards the end