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Does anybody know what gear ratios were used in the NP540 5-speed manual? I'm looking at an old (1966) school bus with one in it. Also how to decode the plate to determine the axle ratio.
I'm interested mainly in a gear ratio best for highway speed. Another one (a 1976) I'm checking out has an Allison 4-speed automatic and its top-gear ratio (according to what I read elsewhere on the internet) is 1:1 with an axle ratio of 6.83 (love it when an old car or truck has its factory spec sheet!) Its owner says it can go 50-55 loaded down with people.
The 1976 has a 360. Don't remember what the '66 has but I'm speculating a 361.
I don't need one that can cruise at 75... I don't have to take Interstates wherever we go. However the interstate we use most often goes through Chicagoland and the times we've been through there, top speed was irrelevant.
Any info is helpful. Thx.
I'm interested mainly in a gear ratio best for highway speed. Another one (a 1976) I'm checking out has an Allison 4-speed automatic and its top-gear ratio (according to what I read elsewhere on the internet) is 1:1 with an axle ratio of 6.83 (love it when an old car or truck has its factory spec sheet!) Its owner says it can go 50-55 loaded down with people.
The 1976 has a 360. Don't remember what the '66 has but I'm speculating a 361.
I don't need one that can cruise at 75... I don't have to take Interstates wherever we go. However the interstate we use most often goes through Chicagoland and the times we've been through there, top speed was irrelevant.
Any info is helpful. Thx.