Differential Ratios We have the listings from 1987 thru 1994 but none of the rest. If you know of a resource for the other years please let us know. Explanations: (M)=manual transmission (A)=automatic transmission E30 1987 1988 1989 1990 1991 1992 1993 1994 318i/is (M42) * * * * 4.10 (M) * * * 318ic (M42) * * * * 4.27 (M) 4.27 (M) * * 325 2.93 2.93 * * * * * * 325e/es 2.93 * * * * * * * 325i/is/ic 3.73 3.73 3.73 (M) 3.73 (M) 3.73 (M) 3.73 (M) 3.73 (M) * 4.10 (A) 4.10 (A) 4.10 (A) 4.10 (A) * * 325ix * 3.91 3.91 (M) 3.91 (M) 3.91 (M) * * * 4.10 (A) 4.10 (A) 4.10 (A) M3 * 4.10 (M) 4.10 (M) 4.10 (M) 4.10 (M) * * * E36 1987 1988 1989 1990 1991 1992 1993 1994 325i/is * * * * * 3.15 (M) 3.15 (M) 3.19 (A) 3.19 (A) 318i/is * * * * * 3.45 (M) 3.45 (M) 4.45 (A) 325ic * * * * * * * 3.15 (M) 3.64 (A) E28 1987 1988 1989 1990 1991 1992 1993 1994 528e 2.93 3.25 (M) * * * * * * 535i/is 3.25 3.25 * * * * * * M5 * 3.91 (M) * * * * * * E34 1987 1988 1989 1990 1991 1992 1993 1994 525i (M20) * * 3.73 (M) 3.75 (M) * * * * 4.10 (A) 4.10 (A) * * * * 525i (M50) * * * * 3.23 (M) 3.23 (M) 3.23 (M) * 4.10 (A) 4.10 (A) 4.10 (A) 525it * * * * * * 4.10 (A) * 530i * * * * * * * 3.07 (M) 3.15 (A) 530it * * * * * * * 3.23 (A) 535i * * 3.46 (M) 3.46 (M) 3.46 (M) 3.46 (M) 3.46 (M) * 3.91 (A) 3.91 (A) 4.27 (A) 4.27 (A) 4.27 (A) 540i * * * * * * * 2.93 (A) M5 * * * * 3.91 (M) 3.73 (M) 3.73 (M) * E24 1987 1988 1989 1990 1991 1992 1993 1994 635csi, L6 3.64 (M) 3.64 (M) * * * * * * 3.91 (A) 3.91 (A) * * * * * * M6 3.91 (M) 3.91 (M) * * * * * * E23 1987 1988 1989 1990 1991 1992 1993 1994 735, L7 3.46 * * * * * * * E32 1987 1988 1989 1990 1991 1992 1993 1994 735i/il * 3.64 3.64 (M) * * * * * 3.91 (A) 3.91 (A) 4.27 (A) 4.27 (A) 740i/il * * * * * * * 2.93 (A) 750i/il * 3.15 (A) 3.15 (A) 3.15 (A) 3.64 (A) 3.64 (A) 3.64 (A) * E31 1987 1988 1989 1990 1991 1992 1993 1994 850 * * * * 2.65 (M) 2.65 (M) 2.65 (M) * 3.64 (A) 3.64 (A) 3.64 (A) Vines Automotive