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Click on image for the lowdown. 
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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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Nov 2000 Posts: 1,969 'Bolter | | 'Bolter Joined: Nov 2000 Posts: 1,969 | smokey_truck
It's right at 90% overdrive or a 10% reduction in RPM at any given speed. So if you have to turn 3000 rpm to go 60 mph with the 4.57 you'll only have to turn 2700 with the 4.10. (somebody check my math) Does it make such a difference is a valid question.
Professional Novice
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