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Answer can be found in the rack setting charts (bible)
[attachment=66693]D4 Rack Setting #1.jpg[/attachment]
Speaking of the D315 engines, I can notice a lot of difference in the horsepower and sound of my 112 3U (1949) and my D4-7U (1950) particularly the RPM's. 112 much higher pitch.
Thanks OM.
Old Magnet, footnote # 12, I assume* must be the break between 955C and 955E at 12A5793? that's good to know the rack setting are different. Thank you.
*yes I know...
The other footnotes...
[attachment=66694]D4 Rack Setting #2.jpg[/attachment]
they added quite a bit of horsepower from the early 6U--7U series to the later. please explain the 5H607 gear group?
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1st-1.34 2nd-1.85 3rd-2.72 ?? is 5th 5.37? is there no 4th? i guess there is another lever that makes reverse Hi/Lo?
Phildirt put the shift pattern just above where he wrote "I mostly see...." There's only one shifter, and instead of a fifth gear, it has LR and HR
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