OK, School house time..
1) A Peerless transaxle which was then made by Tecumseh, will have a TC- prefix to the part numbers. Peerless Transaxles was recently purchased and is now owned by Husqvarna
2) An Agri-Fab transaxle will have AF- prefixes to the part numbers.
3) Please check the parts number listings for the Model 1330 transaxle....Geeez look at all those AF- part numbers....now I wonder who made that...
4) The gear shift models in that series have a 5-speed on it and the hydrostatic models (including the Model 1330) have Sundstrand Hydrostatic transmissions.
The Parts Manual and Sevice Manual are very helpful in servicing the 1330...Hint, Hint....
Hope this helps.
Myron B