| When looking for an AOD-E/4R70W tranny |
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The bell housing pattern is different for a 4.6L or 5.0L/3.8L/4.2L engine and the two are incompatible. The two case types can be distinguished by looking at the starter flange area. If the starter has three attaching bolts, the case fits only 4.6L engines. A two-bolt starter indicates a 5.0L/3.8L/4.2L compatible case (casting number may begin with "F4ZP", not available before 1994).
Does the unit have a wide or standard ratio gear-set? This requires you to know the original application or remove the pan and inspect the ring gear through a drain-back slot. AOD-E transmissions built through 1995 share the same standard gear ratios as the AOD, except for the 1994-95 Thunderbird, 1994-95 F and E series trucks, 1995 Full Size Cars and the 1993-95 Lincoln Mark VIII. 1996 and later units are all wide ratio transmissions.
Valve bodies for 1992 cars have a different shift pattern ("P-R-N-OD-D-1", like an AOD) than other AOD-E/4R70W units ("P-R-N-OD-2-1"), because these cars had no Overdrive Cancel Switch.
3.8L V-6 AOD-E/4R70W transmissions have only one less clutch plate than V-8 units and with our valve body kit are at least as strong as any AOD. If you are planning to replace the clutches in your transmission, two new pressure plates (less than $20) from the Ford parts department will make it equal to a V-8 AOD-E/4R70W. Unlike the AOD, you need to avoid buying V-6 versions of the AOD-E/4R70W transmission.
Some trucks (and possibly a few Lincolns) use a one-inch-longer output shaft than the Mustang and other vehicles.
Many AOD-E/4R70W units (especially later and wide ratio units) use an extension housing with a larger output bushing. This housing accepts a slip yoke with a larger outside diameter. This is not a major problem, as the slip yoke or extension housing can be changed and all output shafts share the same 28-spline profile as an AOD or C-4 transmission. An AOD-style extension housing can easily be bolted onto an AOD-E/4R70W. The large bushing housing bears a casting number beginning with "F3LP" for the standard length and "F3UP" for the long unit. The small standard length housings are marked with either "F2TP" or "E0AP". The small bushing long version is marked as "E0TP" or "E0LP" and is probably only used with the AOD transmission.
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