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Jul 21st, 2025 | | | | Joined: Jul 2009 Posts: 48 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2009 Posts: 48 | Which five speed Overdrive manual trans do I want in order to get decent freeway speed from my 57 3600?
Towns in Nevada are far apart, 55 MPH will not cut it.
Engine is a strong 350.
Still want to haul and tow, may want to keep a granny low if possible.
But I have to get a taller final drive.
Prefer not to change the rear axle, trans seems like it may be easier and less expensive.
I will replace the mechanical trans brake with a line-lok.
Current trans works and shifts very well, just too low in fourth gear.
1957 Chevy 3600At these prices I want my gas 100 octane, leaded, and my windshield washed! | | | | | Joined: Dec 2004 Posts: 1,897 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 1,897 | 1994-1997 dodge 2wd NV4500. 5 speed with granny low and OD. 5.61:1 granny, 0.73:1 OD. This transmission is easily adaptable to work with the stock clutch linkage and a mechanical speedometer, and is strong enough to take anything you can throw at it. 5th gear would affectively give you a final drive of 3.34:1 instead of 4.57:1. I am not sure of what size tires you are running, but if they are about 31 inches in diameter, RPM at 70mph would be about 2530 rpm | | | | | Joined: Jul 2009 Posts: 48 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2009 Posts: 48 | What bell housing?
Mounting kit available, or have to fab my own?
Had not expected a Dodge trans to be the answer.
1957 Chevy 3600At these prices I want my gas 100 octane, leaded, and my windshield washed! | | | | | Joined: Dec 2004 Posts: 1,897 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 1,897 | Standard chevy bellhousing with a 1 inch thick adapter. Do a search on this site for the NV4500, there is lots of info on the swap. If you are still confused... pm me. I put one of these in my 1959 gmc 1/2 ton longbed behind a well built pontiac v8. this swap will move the shifter back 6 inches compared with the stock 4 speed. The GMC v8 sits about 4 inches forward of where the chevy v8 sits, so check to see if you have clearance with your seat. | | | | | Joined: Apr 2000 Posts: 499 'Bolter | | 'Bolter Joined: Apr 2000 Posts: 499 |
'67 GMC 3/4 292 4spd
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