: Detailed ratio comparisons for MT2 and MU9 variants (e.g., 1st: 3.77, 6th: 0.62) can be found at FastFieros . Performance & Repair Parts
If you are looking for technical documentation (a "white paper" or manual) or solid parts for the GM F40 6-speed manual gearbox, here are the most authoritative resources and components available. Technical Specifications & Papers f40-gearbox
If "solid paper" refers to finding reliable physical components, these are the top-rated options for rebuilding or replacing an F40 unit. : Detailed ratio comparisons for MT2 and MU9 variants (e