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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: Oct 2007 Posts: 231 Shop Shark | | Shop Shark Joined: Oct 2007 Posts: 231 | I got a 64 3/4ton chevy 4spd drive-train 4x4 with a 350. I don't have a tachometer so i was wondering what speeds are usually a good time to shift on flat ground? I understand i can figure it out by using sites to figure it out but i'm unsure of what the gears in the transmission, 1st is something like 7:1. does anyone know what the axle ratio is? | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Assuming that the trans and axles are the oem parts, your ratios are as follows;
Transmission
1rs- 7.05:1
2nd- 3.58:1
3rd- 1.71:1
4th- 1:1
Reverse- 6.78:1
The axle ratios should be 4.55:1 front, 4.56:1 rear.
Bill Burmeister
| | | | | Joined: Oct 2007 Posts: 231 Shop Shark | | Shop Shark Joined: Oct 2007 Posts: 231 | | | | | | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | Run it hard once then deduct 100 rpm for fun driving,500 for normal. You can feel it when it poops out running hard.(shift quicker) Other wise just shift it soft. You arn't racing any one are you? | | |
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