Toyota Differential ID Codes

First Digit Second & Third Digits
Diameter of Code Gear Ratio Code Gear Ratio Code Gear Ratio Code
Ringgear
138mm A 3.300 01 3.364 27 3.356 48
145mm B 3.360 02 4.300 28 3.729 49
6.25" C 3.545 03 4.100 29 3.400 50
6.62" D 3.556 04 3.727 30 3.736 51
7.1" E 3.700 05 3.909 31 3.722 52
7.5" F 3.889 06 6.591 32 3.250 53
8" G 3.900 07 4.807 " 3.941 54
9" H 4.111 08 7.503 33 3.333 55
9.25" J 4.222 09 5.583 " 2.821 56
9.5" K 4.375 10 6.781 34 4.058 57
10.5" L 4.444 11 4.786 " 3.238 58
12.5" M 4.625 12 7.636 35 3.234 59
13.5" N 4.790 13 5.600 " 3.519 60
14" P 4.875 14 4.778 36 2.724 61
12" Q 5.125 15 3.583 37 2.892 62
162mm R 5.286 16 3.417 38 2.655 63
6.38" S 5.600 17 3.154 39 4.312 64
6.7" T 5.714 18 5.375 40 3.837 65
6" U 5.833 19 3.308 41 3.071 66
10.6" V 6.167 20 6.500 42 3.526 67
15.5" W 6.667 21 3.550 43 3.095 68
142mm X 6.780 22 3.214 44 4.176 69
158mm Y 6.833 23 3.533 45 5.857 70
202mm Z 7.640 24 2.928 46 2.962 71
no ringgear - 4.556 25 2.929 " 3.949 72
5.571 26 3.944 47 4.285 73
Fourth Digit
Number of Code Limited Slip
Pinions ..meaning
2 2 NO T312 = 6.7" Ringgear, 3.909 Ratio and 2 spider NO LSD
2 3 YES G295 = 8" Ringgear, 4.100 ratio and 4 spider LSD.
4 4 NO -474 = NO ringgear (FWD) 3.944 Ratio and 4 spider NO LSD
4 5 YES P194 = someone just sold you a truck diff…..OOOPS!

New Differential ID Codes

Unfortunately, Toyota now have a new code system to discribe diffs on the ID plate : ( Often they look like this:

A03A

It seams regardless of model, most diff codes are A03A or something very similar. I can't work it out. Similaror the same code on a Hino truck to that on a Landruiser or Corolla. As far as I know, that last letter referes to LSD or not.

A = non LSD
B = LSD

Please let me know if you know more.