What spline is in my 700R4? 700r4 Spline Count
Video provides some insight to the differences between old and new style GM NP205 transfercase and 400 Turbo transmission. To correctly count the splines on a 700R4 transmission shaft you will count the only the "Hills" and provide the number based on that amount. I think torco sent the wrong converter. Johnny's 81 C10 got a Motive Gear 3.73 ring & pinion. Has a Dart headed 350 with a stage 3 700R4 & 2500 stall converter. ...