New Transmission Naming
Recently I discovered while browsing through a parts catalog at the store that somewhere in the recent past all of the transmission naming conventions that I thought I knew have been changed. Some of the old designations did not change but many have. Not sure why but it apparently was a good idea to someone. Here is what I have been able to piece together. The lising is with the old designation first and the new designation second.
Renamed GM Transmissions
| Old GM Name |
New Name |
| TH125C |
3T40 |
| TH180C |
3L30 |
| TH180C (4 Spd Electric) |
4L30E |
| TH400 |
3L80 |
| TH400 (4 Spd Electric) |
4L80E |
| TH440T4 |
4T60 |
| TH440T4 (Electric) |
4T60E |
| TH475 (HD400) |
3L80HD |
| TH700R4 |
4L60 |
| TH700R4 (Electric) |
4L60E |
| MH1 |
4T80E |
| 4 spd FWD |
4T40E |
| 4L60E HD |
4L65E |
Renamed Ford Transmissions
| Old Ford Name |
New Name |
| AODEW |
4R70W |
| 4 spd FWD |
CD4E |
| AXODE |
AX4S |
| AXODE SHO |
AX4S HO |
| AX4N |
AF50N |
| A4LD Electric |
4R44E,4R55E |
| A4LD 5 spd |
5R55E |
| 4EAT Probe |
G4A-EL |
| F4EAT Escort |
F4A-EL |
| GF4EAT 7 solenoid Probe |
GF4A-EL |
| 4F20E Villager |
RE4F04A |
| FN Focus |
4F27E |
Renamed Chrysler Transmissions
| Old Chrysler Name |
New Name |
| A404 |
30TH |
| A413/470 |
31TH |
| A500 |
40RH/42RH |
| A518 |
46RH |
| A604 |
41TE |
| A604LD |
40TE |
| A604 AWD |
41AE |
| A606 |
42LE |
| A618 |
47RH |
| A727 |
36RH/37RH |
| A904 |
30RH |
| A998 |
31RH |
| A999 |
32RH |
| AW4 Jeep |
A340 |
So if you are having a tough time finding listings that make sense for transmission parts this may help.