answer to any 4l60e trouble

[silverado13]

no because without the tcc solenoid, the torque converter wont engage and you wont get out of second gear

 

[gimmel1]

ok so what tells the trans when to shift

 

[silverado13]

lol well i know all the components of the transmission but im not 100% sure "how" it all works, i know it has to do with certain pressures in the transmission combined with the computer telling the 2 shift solenoids when to engage and disengage, shift solenoids are know to go bad and are easy to replace

 

[silverado13]

look at this piuc, it might clear something up for you
http://chevroletforum.com/forum/mem...east-1003-picture-4l60evalvebodytypical-4030/

 

[gimmel1]

Well I think its somethin other than the trans does anyone know how the rpm
signal effects the shifting because when the truck is cold it will shift when hot or warm it won't

 

[silverado13]

ive heard of the other way around but never like that, id replace the electronics in the pan, that aught to fix things

 

[gimmel1]

I have done that I've replaced all but the tcc solenoid. I'm wondering if a bad control module or a pickup could be bad, cause its heat related

 

[silverado13]

what id do is bring it to a shop and have them hook it up to their computer and have them diagnos it

 

[felon637]

Take it to a shop and have them diagnose it as stated above.

The shifts are controlled by the PCM with inputs from the VSS, Tach, TPS, ECT, MAP, and Trans Position Switch. The signals from these sensor are compared to maps in the EPROM then the PCM gives the requested command to the transmission.

 

[gimmel1]

Can't find any one around here that does that that is not outrageously expensive and I've had codes checked and all I have is code 67