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I have a rebuild 4l60E shifts great usually… but for some reason when it’s cold it will clunk into drive and reverse.. attached is a photo of what has been done to the trans along with a video of what it’s doing..
Idle line may be to high, Some builders trun up the EPC solenoid this can cause this or other means to raise line. Also note while receipt does not say it pinless fwd accums do limit travel but since its reverse to I would say idle line is a bit high. IMO.
Will it cause any issue not likely. Also idle mspeed might be a bit high
__________________ Frank formerly of Performabuilt, Now just me, What can I build for you today? Call or message me. Click sig pic for my facebook
Idle line may be to high, Some builders trun up the EPC solenoid this can cause this or other means to raise line. Also note while receipt does not say it pinless fwd accums do limit travel but since its reverse to I would say idle line is a bit high. IMO.
Will it cause any issue not likely. Also idle mspeed might be a bit high
honestly reverse is a little rough, but drive is awful… again only when it’s cold. Once it warms up for 10 min it’s perfect.
Had a shop tame it down a little bit with HP tuners but it still isn’t 100%.. got about 25% better lol
honestly reverse is a little rough, but drive is awful… again only when it’s cold. Once it warms up for 10 min it’s perfect.
Had a shop tame it down a little bit with HP tuners but it still isn’t 100%.. got about 25% better lol
sounds like i need to pick up a HP tuners
Then I would look at the fwd accum make sure its not sticking cold and spring is in and the correct one, You could also change it to spring with less tension to increase accumulation this would affect at all temps but that would not matter really . Also its possible someone could have enlarged the FWD feed in plate or even the plate , I have noted difference in sizes on some plate yes new GM plates ,but would thik that would have the opposite affect temp wise.
I would try and get a preasure gage on it to and see what the idle line of cold verse hot , Also what is the engine RPM cold ? Generally its higher.
__________________ Frank formerly of Performabuilt, Now just me, What can I build for you today? Call or message me. Click sig pic for my facebook
Then I would look at the fwd accum make sure its not sticking cold and spring is in and the correct one, You could also change it to spring with less tension to increase accumulation this would affect at all temps but that would not matter really . Also its possible someone could have enlarged the FWD feed in plate or even the plate , I have noted difference in sizes on some plate yes new GM plates ,but would thik that would have the opposite affect temp wise.
I would try and get a preasure gage on it to and see what the idle line of cold verse hot , Also what is the engine RPM cold ? Generally its higher.
i have a gauge on order- will be here next week. New to this so figured I’d ask-
Engine rpm cold is around 8-850 when it warms up is about 675-725
I would like I said check line cold verses hot , Its natural with the higher ilde speed for the engagement to be a littte firmer cold but should not be a huge difference.Keep posted as you learn more.
__________________ Frank formerly of Performabuilt, Now just me, What can I build for you today? Call or message me. Click sig pic for my facebook
Mine was doing the same thing and cleaning the MAF until the wires and bars were shiny fixed it. I know it sounds funny but it’s true. That might be something to look at but since the transmission just got rebuilt I’d have to think it’d be more likely to do with the rebuild. Have you reached out to the shop?
Mine was doing the same thing and cleaning the MAF until the wires and bars were shiny fixed it. I know it sounds funny but it’s true. That might be something to look at but since the transmission just got rebuilt I’d have to think it’d be more likely to do with the rebuild. Have you reached out to the shop?
Were you throwing a code for the mass airflow sensor?
The transmission was rebuilt in 2020- I just bought the car a couple months ago- the PO stated that the transmission did that before a rebuild as well due to somebody incorrectly, tuning the transmission? I had a shop go in and reset all the values to stock it made it 35% better but it’s still not right..
I’m gonna try to clean the mass airflow sensor- first
Were you throwing a code for the mass airflow sensor?
The transmission was rebuilt in 2020- I just bought the car a couple months ago- the PO stated that the transmission did that before a rebuild as well due to somebody incorrectly, tuning the transmission? I had a shop go in and reset all the values to stock it made it 35% better but it’s still not right..
I’m gonna try to clean the mass airflow sensor- first
It never gave a check engine light and my cheap scanner will only read codes if there’s a light. Google said the MAF can cause shifting issues so I took a gamble and cleaned it and it worked. I took the screen off and I cleaned the bars and wires with rubbing alcohol in a squirt bottle & Q-tips. Of course disconnect the battery while you’re doing it so the ECU can reset (or pull the fuses). It might not matter but it won’t hurt.
Last edited by Y2K_Frenzy; Mar 25, 2024 at 06:04 PM.
It never gave a check engine light and my cheap scanner will only read codes if there’s a light. Google said the MAF can cause shifting issues so I took a gamble and cleaned it and it worked. I took the screen off and I cleaned the bars and wires with rubbing alcohol in a squirt bottle & Q-tips. Of course disconnect the battery while you’re doing it so the ECU can reset (or pull the fuses). It might not matter but it won’t hurt.
cool, will try that after work today. I’ll give you an update. Thank you
cool, will try that after work today. I’ll give you an update. Thank you
It’ll run like crap the first few seconds it’s started after the ecu has been reset but don’t give it any gas. Just let it do its thing. If it doesn’t run crappy when you first start it up the ECU hasn’t been reset.
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4L60E slams into drive when cold 
