Similar TQ issue?

***Jackpine*** · #1 Tue, June 9th, 2009, 10:02 AM

OK, a rapid vibration, right?

I remember back in my early days with an Edge, people were complaining about a "tranny shudder" and this was something that Edge cured with a firmware or calibration update (I can't remember which). I never got it, so I sort of forgot about it when people stopped complaining. This new one sounds like it's somewhat related (to me at least). I'm sure Bill will be able to figure out how to cure it.

It's hard for me to visualize anything in the powertrain that would suddenly start "vibrating" at given speeds though. An effect like that is usually a harmonic feedback from something that's out of balance.

- Jack

f150Stang · #2 Tue, June 9th, 2009, 10:28 AM

My Hex code is TEJF5P7, so it appears to be a similar family to yours Lars.

The cruise control was on, and yes, it was in overdrive.

I believe it may be the TC rapidly locking and unlocking for about 1-2 seconds.

My shudder is not as aggressive as you explain though - infact my passengers did not even notice, but I could! It feels exactly like a miss from a Coil Over Pack (but that is not what it is!) just for a moment though and then everything is alright.

It is so short and "soft", almost barely noticable, but I was just worried that it could cause harm to something in the transmission or TQ.

Other than that, I have not had any other issues and am very satisfied.

***88Racing*** · #3 Tue, June 9th, 2009, 10:56 AM

Well I put up a notice in the moderators area and Corey has responded to it. So hopefully by the end of today we will get our questions answered?

Lars

SubiGT · #4 Tue, June 9th, 2009, 12:31 PM

My shudder happened both before and after the Gryphon, in fact, it's one of the reasons I got the Gryphon. It is much more pronounced with the AC on, but it still occurs with the AC off. I have set the PID's to monitor input vs. output RPM's, and observed no change while I felt the shudder occur. My TFT never gets above 153, and I'm getting 18+mpg on the canned 93tune. I'll monitor and adjust the various transmissions settings once I get the 87perf tune that I'm waiting for.

08F150 · #5 Tue, June 9th, 2009, 05:14 PM

Quote:

Originally Posted by SubiGT

My shudder happened both before and after the Gryphon, in fact, it's one of the reasons I got the Gryphon. It is much more pronounced with the AC on, but it still occurs with the AC off. I have set the PID's to monitor input vs. output RPM's, and observed no change while I felt the shudder occur. My TFT never gets above 153, and I'm getting 18+mpg on the canned 93tune. I'll monitor and adjust the various transmissions settings once I get the 87perf tune that I'm waiting for.

Do you have lots of milage on your truck? Have you ever serviced the trans? I have worked on many fords over the years that have a 4r70w trans and have convertor shudder issues. Feels like going over some washboard road, usualy occurs when the torque starts to lock up at light throttle. Most of the time its cured with a simple trans flush with the proper oil. The additives in the oil breaks down after time not allowing the converter clutch to apply smoothly. Just be sure to do a complete flush.

f150Stang · #6 Tue, June 9th, 2009, 05:46 PM

I only have 28k on the truck and recently changed the trans filter and refilled using ford merc V.

I do not have this issue in stock or canned tow.

***88Racing*** · #7 Tue, June 9th, 2009, 05:58 PM

Only 25K on mine. Filter and flush done at 20k.

No problems at stock level zero. My shudder happens with the CC(cruise control), coasting function and sometimes setting function. Nothing yet with resume. As per Bill added +5mph to tq tip in and this did not help.

Lars