4r100 talk

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Feb 15, 2013 | 08:11 PM

ewils35

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4r100 talk

Ok for all you tranny guys. My truck wont let me go over 40 mph with out the rpms spiking to 3k and not even driving hard. My temps are reading 140 on my trans gauge. so does this mean my trans is shot again? the fluid is reddish pink like normal and it dont smell burnt or look burnt. i have a leak under the inspection plate and thats all i can describe really.

Feb 17, 2013 | 09:51 AM

ewils35

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bringing this back to the top. forgot to mention its a 01 7.3 with a 4r100 auto trans. anyone have any idea?

Feb 17, 2013 | 10:20 PM

BNSONS

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From: NW Indiana

If column shift lever is loose it just might not be in the right gear. That's all I got.

Feb 17, 2013 | 10:43 PM

jerem0621

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is the OD light blinking?

Fuel Delivery issue?

Gremlins from Mars?

Feb 17, 2013 | 11:58 PM

Carnes99

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It sounds to me like your torque converter might be bad.

Feb 18, 2013 | 02:36 AM

ewils35

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OD light isnt blinking. fuel delivery is fine.

Feb 18, 2013 | 06:31 AM

Buck268

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From: Grand Rapids, MI

Have youchecked fluid level?

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Feb 18, 2013 | 10:35 AM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

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From: SE Florida

Can you feel the trans shifting? How many times? You really need to find someone that can look at live data and see if the PCM is telling the trans to shift.

Feb 18, 2013 | 05:26 PM

#10

ewils35

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ill have to take it for a drive again. it drove fine from 730 am to 430 pm when i had to go pick up the fiance.(her car broke down) nothing happened in the parking lot while waiting for the tow truck. once the tow truck came to pick up the car and deliver it to the house on the way home it started acting funny. no od light going off. shifted fine going up to 40 and then rpms spike like nothing was grabbing. temp on my glowshift gauges read 140.

Apr 7, 2013 | 07:48 PM

#11

Buck268

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Quote:

Originally Posted by Mark Kovalsky

Can you feel the trans shifting? How many times? You really need to find someone that can look at live data and see if the PCM is telling the trans to shift.

What hardware/software would this require? For example I use obdwiz (free, software) with my elmscan 5 Usb adaptor- should this be an accessible data stream?

Apr 7, 2013 | 09:49 PM

#12

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

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From: SE Florida

I have no idea what that software is or what it can do. Can you select parameters to look at and see the data stream? I would think you're in a better position to answer that than I am. I don't have that software.

Apr 8, 2013 | 08:36 AM

#13

Buck268

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From: Grand Rapids, MI

Yes I think. What parameters? This is all through the obd2 diagnostic plug right?

Apr 8, 2013 | 10:12 AM

#14

Mark Kovalsky

Frmr Ford Trans Engr

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From: SE Florida

Yes, through the OBDII plug.

I don't know if your software names the parameters the same way the engineering software I used did.

You want to look at gear commanded and gear ratio to start. For example, if the PCM commands third gear but the measured ratio shows the trans is actually in second gear then we know the problem is in the transmission, not the PCM.