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GM Saginaw 4 Speed Transmission Ratios

GM Saginaw transmission ratio is determined my the number of grooves machined on the input shaft on the front of the transmission,
TRANSMISSION 1ST 2ND 3RD 4TH
Saginaw 4-speed 1st 2nd 3rd 4th
         No lines 2.84 2.01 1.35 1.00
         1 Line 2.54 1.80 1.44 1.00
         2 Lines 3.11 2.20 1.47 1.00
         3 Lines 3.50 2.47 1.65 1.00


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