ZF6 Converted tuning

[arejay]

Having a few issues with choosing which tunes to use with a 2002 f-250. had a 4r100, blew too many of those up and decided to zf6 swap it. thats where all the issues started.
Since doing the swap, a few things have been noted. Cannot go into 4LO. no way to tell the pcm that the column is in neutral. Figured bypassing neutral safety would have fixed issue but didn't. Curious if a custom tune would be able to tell the pcm it is safe to shift to 4LO or give up and change to a manual transfer case lever.
Other big issue is a hesitation, or possible misfire/ jerk around 30-45% throttle. any gear range, any load percent, it will do it. Very annoying hauling a trailer.
Got hydra to get a bit more out of the truck. PCM says VDH4 on it, nothing is under the TNAA5S8 hex so went with TNAA4S2 hex for more tunes. still has misfire issue.
Went into TOAA5Z5 hex, which is for standard trans, and now the jerk is totally gone, however check engine light and check gauges lights are on dash and no trans temp gauge.
Curious if a custom tune would be able to mix both of those things together; a tune that runs off the standard platform and hex codes BUT is also able to read trans temp from a 4r100. I have no idea what the difference between what information would be read or why it would be an issue since the automatic pcm tunes can read the trans temp just fine, yet the standard pcm tunes can not. Any help or direction to start digging would be much appreciated

[cleatus12r]

Originally Posted by arejay

Having a few issues with choosing which tunes to use with a 2002 f-250. had a 4r100, blew too many of those up and decided to zf6 swap it. thats where all the issues started.
Since doing the swap, a few things have been noted. Cannot go into 4LO. no way to tell the pcm that the column is in neutral. Figured bypassing neutral safety would have fixed issue but didn't. Curious if a custom tune would be able to tell the pcm it is safe to shift to 4LO or give up and change to a manual transfer case lever.

The PCM doesn't shift the transfer case, there is a four wheel drive module in the 02-03 vehicles behind the dash that does it. The four wheel drive system doesn't care what the PCM code is and the PCM doesn't know whether it's in a 4x4 or 4x2 vehicle - although there are inputs for 4x4Low for shift scheduling. There are a few enable criteria that need to be met though. Speed less than 5 MPH, brake applied, and gear selector in Park or Neutral. I would modify the transmission range selector to show neutral rather than park for everything.

Went into TOAA5Z5 hex, which is for standard trans, and now the jerk is totally gone, however check engine light and check gauges lights are on dash and no trans temp gauge.

You'll have to see what the code is before any help with come of the check engine light.


There is no transmission temperature sensor on a manual transmission and the transmission temperature sensor from the 4R100 won't physically fit the manual since it's part of the shift solenoid assembly....I suppose a guy could attach a sensor with the same temperature/resistance values to the manual transmission and use the existing wire from the automatic harness. The truth is that the factory temperature gauge in your dash reads normal at 60 degrees F and by the time it reads hot, it's usually too late anyway. It's basically a glorified "idiot light". The manual programming won't run the gauge anyway.

Curious if a custom tune would be able to mix both of those things together; a tune that runs off the standard platform and hex codes BUT is also able to read trans temp from a 4r100. I have no idea what the difference between what information would be read or why it would be an issue since the automatic pcm tunes can read the trans temp just fine, yet the standard pcm tunes can not.

Nope. The data for transmission temperature is sent via datastream to the instrument panel cluster. The manual transmission programming has no provision for sending transmission temperature data to the IPC.

The best thing to do in this situation is to have custom tuning done that runs the manual transmission fuel settings in an automatic hex code and then have the automatic transmission diagnostic trouble codes turned off.