Gear ratios table

[Dauntless]

I have recently made up a gear ratio table for 3 popular manual gearboxes found in RWD Volvos, combined with 6 Dana 30 ratios, with speeds per gear per 1000 rpm, keeping in mind this is with stock size tyres. I did this to help me choose which diff ratio to combine my M51 with. BTW 1 mile per hour = 1.61 kilometres per hour, roughly, so divide my speeds by 1.61 to get a result in MPH. If anyone thinks this might be helpful, I can include some other gearboxes, provide both km/h and MPH measurements, and RPM and given speeds in a given gear, most useful when working out RPM at cruise speed. These figures have been checked by me and appear to be close to perfect. ;)

ALL Feedback appreciated!



km/h per 1000 rpm in gear w/ Dana 30 ratios


M51

Diff ratio ---- 4.10 - 3.73 - 3.54 - 3.31 - 3.07 - 2.73

1st - 3.99:1 - 07.3 - 08.0 - 08.5 - 09.0 - 09.7 - 11.0
2nd - 2.58:1 - 11.3 - 12.4 - 13.1 - 14.0 - 15.1 - 16.9
3rd - 1.77:1 - 16.4 - 18.1 - 19.1 - 20.4 - 22.0 - 24.7
4th - 1.27:1 - 22.9 - 25.2 - 26.6 - 28.4 - 30.6 - 34.4
5th - 1.00:1 - 29.1 - 32.0 - 33.7 - 36.1 - 38.9 - 43.7

M46

Diff ratio ---- 4.10 - 3.73 - 3.54 - 3.31 - 3.07 - 2.73

1st - 3.71:1 - 07.8 - 08.6 - 09.1 - 09.7 - 10.5 - 11.8
2nd - 2.16:1 - 13.5 - 14.8 - 15.6 - 16.7 - 18.0 - 20.2
3rd - 1.37:1 - 21.2 - 23.4 - 24.6 - 26.3 - 28.4 - 31.9
4th - 1.00:1 - 29.1 - 32.0 - 33.7 - 36.1 - 38.9 - 43.7
O/D - 0.79:1 - 36.8 - 40.5 - 42.7 - 45.6 - 49.2 - 55.3

W55 Supra

Diff ratio ---- 4.10 - 3.73 - 3.54 - 3.31 - 3.07 - 2.73

1st - 3.57:1 - 08.2 - 09.0 - 09.4 - 10.1 - 10.9 - 12.2
2nd - 2.06:1 - 14.1 - 15.5 - 16.4 - 17.5 - 18.9 - 21.2
3rd - 1.38:1 - 21.1 - 23.2 - 24.4 - 26.1 - 28.2 - 31.7
4th - 1.00:1 - 29.1 - 32.0 - 33.7 - 36.1 - 38.9 - 43.7
5th - 0.85:1 - 34.2 - 37.6 - 39.7 - 42.4 - 45.7 - 51.4

[BrickChick]

Great info man I'm planning on using a getrag Box from an 535i so it'll have the 1:1 final so it's good to know that 2.73 gears exsist or i'd be toast on the Highway. You wouldn't happen to know where I can get some cause All I've found is the 3.07 from jeep places and such.

[Dauntless]

Yeah I'm not sure man, I think some Jeep places might be able to get you a 2.73, but from what I have read they're tough to get. I'm planning to use a 3.07 ratio myself.

[Dauntless]

Oh and I'll try to get the info in some sort of table so it's easier to read!