Peter Broadribb (Madbrit) (65.73.229.176)
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Votes: 0 | | Posted on Wednesday, March 26, 2003 - 1:12 pm: | |
Russ,
I was not being negative about what info you had sent, I was also passing on what I had gained whilst researching for my project.
I agree on the Eaton Calculator and have also used other ones. It worked for what I needed when calculating for my Freightliner conversion.
I will be running a Rockwell 9 speed which has a .72 o/drive and a 3.91 rear end with 11R. 22.5 tires.
I have no idea why these used World Trannys are so much money other than perhaps it is supply and demand keeping them so high.
Can you get the ratio you need to run those speeds to fit your rear end?
I will be turning mine at 1800 at 77 mph. If I take it to 2100 I will be doing 90 mph. At 1500 I will be at 66 mph and to be honest, 65 to 70 is fast enough to cruise with a 65 ft long rig including trailer. So I am not far from what DD is recommending. Gotta watch out for those tires at these high sustained cruising speeds too.
Trouble I had was finding an o/drive tranny and a low numerical ratio. I kept finding trucks with heavy haul gearing such as 4.11 and 4.56.
Good luck.
Peter. |