The 9 speed is much nicer to drive than either of the 6 speeds because the 9 speed is not synchronized. I owned a 93 DT466 with a 10 speed Eaton for about 15 years and about 750k miles was a good truck. Nothing like the Kenworth we had at the time.

Last edited by Challenger 1; 12/02/16 12:43 AM.