auto trans question................

[86lx]

I bought my 94 IDI turbo last month with the a4od in it,I have always had 5 speeds so I am not familiar with this trans,I need to know if this is normal,When I drive easy around it shifts nice and crisp,when I am on a little to alot it will shift from 3000 rpm to 2500 ish then to say.. 2200.,not seperate shifts,this is from 1 st to second,and second to third does the same thing,It seems like a slip but not really.I almost feels like a 2 stage shift,it gets no worse or better,same all the time,is that the converter locking up or not? I never messed with autos,all my Mustangs and trucks have been manual.
Any input would ne nice.Thanks,Tim

[cdnsarguy]

200-300 drop in RPM would be the torque convertor YES. If you just touch the brakes it will do the same thing but opposite..RPM rise.

[86lx]

[ QUOTE ]
200-300 drop in RPM would be the torque convertor YES. If you just touch the brakes it will do the same thing but opposite..RPM rise.

[/ QUOTE ]
also,say when I am in second gear,I can get in the throttle and the trans acts like it goes up 200 rpm then goes back in second and the truck takes off real fast,almost impressive for doing nothing but cutting the muffler out!! Is that feeling the converter flash??

[OkieGringo]

The trans is an E4OD not A4OD. The 2-stage shift is caused by low line pressure. There is an adjustment inside the pan but too much "adjustment" can toast the trans. Anyway, the first thing to do is check the FIPL voltage setting. I think you'll find it is too high.
Line pressure is inversely proportional to the solenoid current. The lower the current is at a given throttle position the higher the line pressure will be. More throttle (higher FIPL/TPS voltage) results in lower line pressure. This is why when the trans computer goes into "Limp Home Mode" the gear changes are SLAMS. It shuts off all current to the solenoid resulting in HIGH pressure shifts.
Remember your High School Algebra? Visualize the x,y Cartesian Coordinate Graph. The x-plane is the FIPL voltage increasing from 0(Theoretically, 0.98volt , or 0.12 volts below whatever the FIPL voltage at idle is) towards the right to what the FIPL voltage is at WOT(3.8-4.5volts).
The Y-plane is your speed in MPH, a graph increasing from 0 mph up.
There is a set of variables (arc-ed lines) for both the upshift points/lines and downshift points/lines. The downshift line should be at least 15% lower than the upshift line. When the (x,y) position crosses the upshift line it shifts up, when the (x,y) position crosses the downshift line, it shifts down. When the (x,y) stays between the lines it HOLDS the gear it is in until the (x,y) crosses one of the lines. Go ahead and draw the graph to make it easier to understand.
The OEM computer has a pre-set set of (x,y)s that you cannot change. So, now you all understand (yeah, right) why it is SOOOOOOO IMPORTANT to have the FIPL set right and that it is not tooooo old.
So, if the E4OD isn’t shifting right and the FIPL is set correctly, and the other 3 sensors are new or “newish” and the ECM Relay is good and all the electrical connections are clean, you’ll need to replace the valve body or computer. I tried changing the OEM computer with another but it made no difference in sluggish 1-2 shift. My new Baumann PROGRAMMABLE Computer made an IMMEDIATE FIX, even with the Basic Startup Program. As of this writing, I’m still “Fine Tuning” the shift points. I LIKE IT!!!! And the E4P.O.S. LIKES IT!!! Can You Hear Me, Now? [img]/ubbthreads/images/graemlins/biggrin.gif[/img] [img]/ubbthreads/images/graemlins/smokin.gif[/img]OkieGringo
P.S. No, I don’t have Stock in the Baumann company.

[86lx]

Would a trans command help?I can get one from a 97 locally for 75.00

[OkieGringo]

[ QUOTE ]
Would a trans command help?I can get one from a 97 locally for 75.00

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Call Banks and ask them. The 97 might have more "input" sensors. [img]/ubbthreads/images/graemlins/shrug.gif[/img]OkieGringo

[jminix]

I've been told all E4OD transmissions take the same transcommander. I'll let you know shortly, as I have a transcommand from a 97 that I'm going to try in my 94'.

good luck