TomoHawk Posted April 16, 2004 Share #1 Posted April 16, 2004 referring to the 3N71B transmission, would it be possible to change the gearing for 3rd gear to something like .75, which would be the overdrive from the 4N71B?thx Link to comment https://www.classiczcars.com/topic/11294-swapping-trans-gears-in-auto-trans/ Share on other sites More sharing options...
Alan Pugh Posted April 16, 2004 Share #2 Posted April 16, 2004 Is the 4N71B an electronic trans. If not why not just fit that.I know a lot of the early overdrive auto trans just locked up the torque converter for fourth gear. Link to comment https://www.classiczcars.com/topic/11294-swapping-trans-gears-in-auto-trans/#findComment-77364 Share on other sites More sharing options...
TomoHawk Posted April 16, 2004 Author Share #3 Posted April 16, 2004 It's Hydraulic and would require mods to the car to fit. Link to comment https://www.classiczcars.com/topic/11294-swapping-trans-gears-in-auto-trans/#findComment-77375 Share on other sites More sharing options...
Alan Pugh Posted April 16, 2004 Share #4 Posted April 16, 2004 I don't believe it would be possible as the front and rear planetary gears would be of a larger diameter and not fit into the 3N71B case. Link to comment https://www.classiczcars.com/topic/11294-swapping-trans-gears-in-auto-trans/#findComment-77377 Share on other sites More sharing options...
TomoHawk Posted April 16, 2004 Author Share #5 Posted April 16, 2004 I thought you would just have to change the gears for 3rd to the new sizes.:disappoin Link to comment https://www.classiczcars.com/topic/11294-swapping-trans-gears-in-auto-trans/#findComment-77431 Share on other sites More sharing options...
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