Hi all, I’m thinking about a manual controlled sequential shifter for the 4R44E or possibly the 5R55E can anyone tell me the electronic solenoid on/off sequences for gear changes in these transmissions. I have ordered a set of manuals off ebay but these will take a while to arrive and it may not even be in them.
For example which solenoids are “on” and which are “off” for 1st, 2nd, 3rd, 4th (5th) gears. A high/low table would be useful, or a link to one.
Also a few other questions….
1, if these transmissions are controlled manually with a sequential switcher can the overdrive be safely engaged in the low gears to create intermediate ratios, just assuming I wanted to try them out would it be safe to engage overdrive in 1st or 2nd gear.
2, is it ok to use raw 12 volts switched via ground, or do these solenoids require some current limiting measures like a line resistor to emulate how the ECU controls them. The reason I ask this is that someone suggested that the ECU might pulse the ground switching to limit the constant current through the active solenoids after they have engaged.
3, ok getting optimistic now, assuming for example 3rd gear required just number 3 solenoid “on” and the change to 4th gear requires numbers 3+4 “on”, should I time in a few milliseconds “off” interval for number 3 or just keep it switched “on” and bring in number 4. It would be easier to have an off period for 3 and then bring in 3+4 but maybe it would need to stay on for a smooth change.
Any help or guidance with any part above is appreciated, I may end up just buying a propriety shift controller, but where’s the fun in that, also I want to fully understand the electronic control process if things go wrong with it.
.
For example which solenoids are “on” and which are “off” for 1st, 2nd, 3rd, 4th (5th) gears. A high/low table would be useful, or a link to one.
Also a few other questions….
1, if these transmissions are controlled manually with a sequential switcher can the overdrive be safely engaged in the low gears to create intermediate ratios, just assuming I wanted to try them out would it be safe to engage overdrive in 1st or 2nd gear.
2, is it ok to use raw 12 volts switched via ground, or do these solenoids require some current limiting measures like a line resistor to emulate how the ECU controls them. The reason I ask this is that someone suggested that the ECU might pulse the ground switching to limit the constant current through the active solenoids after they have engaged.
3, ok getting optimistic now, assuming for example 3rd gear required just number 3 solenoid “on” and the change to 4th gear requires numbers 3+4 “on”, should I time in a few milliseconds “off” interval for number 3 or just keep it switched “on” and bring in number 4. It would be easier to have an off period for 3 and then bring in 3+4 but maybe it would need to stay on for a smooth change.
Any help or guidance with any part above is appreciated, I may end up just buying a propriety shift controller, but where’s the fun in that, also I want to fully understand the electronic control process if things go wrong with it.
.
