Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - TH350 vs. 7004R? Also, gears?
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Old 10-18-2007, 12:53 AM
westfaliaguy westfaliaguy is offline
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Auto Trans/Ratio Problems

You say that you have one "issue", but I see at least three. A plain TH350 won't run 14 second quarters with 2:73 gears even if you have 375hp. Your best choice would be 3:73 gears with a modified TH350C trans. This transmission has the ability to lock-up in top gear and return decent milage on the highway. You could "build" a 700-4R trans for this application but you would have to install an upgraded clutch pack and sprage kit from a 350C/R trans to make it reliable. You can buy this upgrade-kit from most suppliers for about $300-$350. If you take a 700R4 trans out of an Astro Van, it is set-up for a 4.3 liter V6 and can't handle the power from a V-8 engine! At some point in time, you will have to decide if you want good milage or to run 14's in the quarter! Speed costs money! How much "speed" do you need? Good milage requires good sense. The choice is your's! Your's, Westfaliaguy
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