1988 Ford E-150 Motorhome, lubrication

ScottG wrote:
Beware that if the trans has been rebuilt, it will likely use something different than type F if it were a C6. You can get a full synthetic in any ATF including Type F.

I don't think it can be a C6 because one of the difference between a C6 and AOD transmission is the AOD is 4 speed transmission using an OD gear.

From online search.

The C6 was included in the following engines: 300, 302, 351w, 400, 351c, 351m, 460, 6.9L, 7.3L, 352, 360 and 390. The AOD was only offered in the 300 and 302. The gear ratios for the C6 are: first -- 2.46:1, second -- 1.46:1 and third -- 1.00:1. For the AOD, the gear ratios are: first -- 2.40:1, second -- 1.47:1, third -- 1.00:1 and fourth -- 0.67:1.

AOD has a 4th gear which the C6 does not.

Trans Codes and Mileage

The trans code on Fords helps owners understand exactly what is under the hood of their car. Ford Motors has produced at least a dozen different types of transmissions, and the trans code helps owners decode which type of transmission their car has. The trans code for the C6 is "K" and for the AOD is "T." Because the C6 is capable of handling more power, it requires more power so the fuel mileage tends to suffer in trucks running the C6. The AOD typically offers better mileage.

My Trans code from VIN and door decal = T

There is also a tag on each transmission where one should be able to confirm the VIN code.



Appearance in the Instrument Panel

Ford trucks that came with the C6 transmission have the following shifting appearance: P R N D 2 1. The AOD models are: P R N (D) D 1.

Apparently if the transmission only has three gears it can't be an AOD.

I'm thinking of performing a passive flush, flushing out the old transmission fluid. One problem with ATF is if it sits a long time, even if stored in bottles, etc. it potentially oxidizes and looses lubrication properties and effects the performance of additives.

If you have a motor-home that's been sitting a while it's a good idea to flush out old ATF and other fluids because of oxidation.

Motor oil is the same way, for shorter periods of time. Most motor oils come with a yearly replacement change recommendation.

Many motorhomes often sit most of their lives. So things like fluids, tires, etc. may require changing before use.