E4OD Question - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 2 (permalink) Old 08-07-2015, 11:39 AM Thread Starter
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Join Date: Oct 2011
Posts: 43
E4OD Question

Hello, I have here a 1989 F-350 7.3 IDI without a turbo, 4x4 E4OD D60F and 10.25 R with 4.10 gears.

When the engine isn't warmed up, it makes 1800 rev's @ 25 Miles per hour,
I didn't feel that is normal, can somebody tell me something about that?

The truck has only 8000 Miles on it.

Oh, what is Transmission Final Gear Ratio?
and what's that for this truck?

Thanks a lot.


1989 F-350
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post #2 of 2 (permalink) Old 08-07-2015, 02:15 PM
Former Ford Trans Engr.
Mark Kovalsky's Avatar
Join Date: Aug 2007
Location: SE Florida
Posts: 3,029
Re: E4OD Question

The E4OD has four ratios. 2.71:1, 1.54:1, 1:1, and 0.71:1. Final drive ratio usually refers to the axle ratio, not a transmission ratio.

Yours doesn't seem to be shifting when it should. There is a sensor on the engine injection pump that probably needs to be replaced or at least adjusted. I don't have the procedure.

Former Ford Automatic Transmission Engineer

ďThe good thing about science is that it's true whether or not you believe in it.Ē ― Neil deGrasse Tyson
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