Forum Discussion
Bedlam
Sep 06, 2015Moderator
Farmerjon wrote:Bedlam wrote:
The CTD is a longer stroke than the PSD and requires less RPM to make its power. This was the hardest part for me to get used to after running a PSD for 10 years. My CTD runs with 4.44 gears and my PSD had 3.73 ratios. Since I rarely drive over 65 mph, I don't need tall gears and am happy with my current combination.
4.44 gears are pretty low which would give you higher revs than 3.73 gears.
What RPMS are you turning at 65?
I'm usually spinning under 2000 rpm at 65 mph in 6th gear on the Aisin. There are still grades I may climb in 4th with my 22k lb GCW, but those are usually twisting as they climb, so I am not taking them at 65 mph.
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