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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | Actually the OD will kick in at 28 mph in ANY forward gear. This is the speed at which the governor activates and sends current to the solenoid. The solenoid will stay engaged till speed is less than 28 mph so if 2nd gear high rpms bother you just shift into high gear before engaging the OD. Once in OD you can shift back down into 2nd gear and still be in OD if you have a need for 2nd over. With 3.90 rear the final drive in OD will be 2.73---a great road gear.
Evan
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