Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,466
Re: Low whining sound from undercarriage
Quote:
Originally Posted by Hib Halverson
(snip)
There are no "straight cut" gears in any version of the ZF S6-40.
Gears in the early 6-40s have a slightly smaller helix angle and that's why the early transmissions are a little more noisy and have a little higher input torque rating.