4l65e holding 2,3, gears
4l65e holding 2,3, gears Mustang LS swap 6.0 vortech with 4l65e PSI harness with truck PCM just flash
Question having an issue with my 4l65e shifting as it started with the vent tube being disconnected causing smoke coming out at WOT. Now that I have found the hose that goes connected to the vent tube tranny doesn’t smoke problem solve there. Car is not shifting gears like it did seem like it’s on over drive or haul bottom holding the second gear and third until about the time I am ready to ease out of the throttle...then downshift. Most of the time if I roll in hard enough I want it to drop to first it seems to do the same thing...delay until I have accelerated to the point I no longer really need or want a downshift.. I can only assume maybe since I connected the hose its holds more pressure over the vent tube just being open. Ill check the converter locks or unlocks could this be it? or Maybe I need a correct data tune in my PCM for the tranny not sure what’s on there right now. I do know it has the wrong gearing and tire size to what I have. But keep in mind the car shift before fine now second shifts at 3rpm third won’t unless I release gas then let the RPM go down or it might but the RPM just goes up to passing 4rpm. Hope I can get some pointers on this issue if it’s the pcm can anyone referred me to a sponsor or anyone that can tune my PCM correctly.
Question having an issue with my 4l65e shifting as it started with the vent tube being disconnected causing smoke coming out at WOT. Now that I have found the hose that goes connected to the vent tube tranny doesn’t smoke problem solve there. Car is not shifting gears like it did seem like it’s on over drive or haul bottom holding the second gear and third until about the time I am ready to ease out of the throttle...then downshift. Most of the time if I roll in hard enough I want it to drop to first it seems to do the same thing...delay until I have accelerated to the point I no longer really need or want a downshift.. I can only assume maybe since I connected the hose its holds more pressure over the vent tube just being open. Ill check the converter locks or unlocks could this be it? or Maybe I need a correct data tune in my PCM for the tranny not sure what’s on there right now. I do know it has the wrong gearing and tire size to what I have. But keep in mind the car shift before fine now second shifts at 3rpm third won’t unless I release gas then let the RPM go down or it might but the RPM just goes up to passing 4rpm. Hope I can get some pointers on this issue if it’s the pcm can anyone referred me to a sponsor or anyone that can tune my PCM correctly.
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Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
You need to hook up a scanner that tells you what gear the PCM is commanding.
I suspect the trans is working fine and the PCM is commanding the wrong gear. This can be due to a sensor and/or tuning problem.
Without data from a scanner, we are all just guessing. You can buy a scanner, rent a scanner or have a trans shop hook one up for you.
With all the custom parts, bolt-ons and future projects you seem to have, you really should consider something like HP Tuners or EFI Live so that you can tune, scan and data log.
I suspect the trans is working fine and the PCM is commanding the wrong gear. This can be due to a sensor and/or tuning problem.
Without data from a scanner, we are all just guessing. You can buy a scanner, rent a scanner or have a trans shop hook one up for you.
With all the custom parts, bolt-ons and future projects you seem to have, you really should consider something like HP Tuners or EFI Live so that you can tune, scan and data log.
