3R Slip Yoke, 700R4, 4L60E, TH350 and 200-4R.
3R Series Slip Yokes
27 spline inside snap rings, fits TH350, TH400 long tail, 700R4, 4L60E and 200-4R. Shaft 1 1/2 X 5 inches. 1 1/8 inch caps. About 3 19/32 inches across U-joint. #72
The 1350 series and the 3R series yokes are equally as strong, but the 1350 series has a larger stronger U-joint.