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Old 10-01-2012, 02:32 PM
Mark Oomkes Mark Oomkes is offline
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Join Date: Dec 2000
Location: Grand Rapids, MI
Posts: 9,340
Originally Posted by Cummins343 View Post
We use the 3000's in all our fire trucks. Great tranny's, solid. We've never had a problem with them.
Are they 3000's or 4000's?

I think ours are 4000's.

I believe the 3's are MD (medium duty) and 4's are HD (Heavy Duty).
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