Torque Converter And Turbine Shaft Spline Changes - ATSG AXOD Update Handbook

CHANGE: Beginning on December 20, 1993, for the 1994 production schedule, Ford Motor Co. changed the
converter turbine splines and the turbine shaft splines to 25 teeth from previous 23 splines.
REASON:
Improved durability for higher torque applications.
PARTS AFFECTED:
(1) TORQUE CONVERTER - Converter turbine splines changed from 23 splines to 25 splines. To
identify this change, the converter "Stamp Code" was changed. Refer to the chart found in Figure
67 for identification, if the converter has not been rebuilt.
(2) TURBINE SHAFT - Splines changed from 23 splines to 25 splines. Count the number of splines
on turbine shaft for positive identification.
INTERCHANGEABILITY:
If replacement of either torque converter and/or turbine shaft is necessary, ensure that equal
number of splines exist on the mating parts.
CAUTION: It is possible to install a 25 Spline converter onto a 23 Spline turbine shaft. If this
occurs, the vehicle will have a "No Movement" condition and after the engine is started will
usually twist off the stator shaft (Drive Sprocket Support).
Two "Notches" 180 Degrees
INNER VIEW OF
CONVERTER HUB
OPENING
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
FORD AXOD/AXOD-E
CONVERTER TURBINE SPLINES CHANGE
FROM 23 TEETH TO 25 TEETH
Apart Indicate a 25 Tooth
Turbine Hub
"Do Not" Use I.D. Stamp Code For
Identification If Converter Has Been
Re-Manufactured
1993-Back Models: Are 23 Spline From OEM
1994 Models Could Be Either
CONVERTER
STAMP CODE
(23 TEETH)
18 Or 36
24 Or 37
25 Or 38
26 Or 43
27 Or 40
1995-Up Models: Are 25 Spline From OEM
Figure 67
79
CONVERTER
STAMP CODE
(25 TEETH)
19 Or 45
28 Or 42
29 Or 39
30 Or 44
31 Or 41
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