Power flow diagram 5hp19
5hp19= 5 speed.......hydraulic planetary.......ZF design number19
Also called A5S325Z
2002 got reverse drum upgrade. If you have a 2002 yours should not fail
Production run of the 5hp19 ran until 3/2002
Eriksson industries sells individual zf parts kit to rebuild this
http://www.thectsc.com/ ........sells rebuild kits
I don't reply to add stuff to my threads. I always edit original content
Sorry if you have to reread it but because of information flow that is added. The information has a relevant place and fits in a certain spot. It's usually information I didn't have before.......3 days ago I knew very little about transmissions. If the automatic fails all the time and the automatic is scary to even look at. We better make it un scary. After looking at it. It's very much more simple to rebuild than an engine.*
Putting this on here for reference and help understanding
There are 7 sets of clutch packs that are in this transmission
each clutch pack has their own cylindrical housing
There are 2 gear sets.....a ravigneaux set in the front and a Simpson (older simple design) set in the back
These are in order from front to back of transmission
Clutch C (brake)
Clutch B (reverse gear)
Clutch A input
Clutch E input (nestled inside of A)
Clutch D (brake) only used for reverse and always the no reverse culprit. Buy upgraded version
Clutch G (brake)
Clutch F input
The 3 diagonal lines near the respective letters are brakes
1st gear..........A G
2nd gear.........C A G
3rd gear..........C A F
4th gear..........A E F
5th gear..........C E F
Reverse.........B D G
GWK.............lock up torque converter clutch (inside torque converter and only applied at cruise)
FL1...............free wheeling clutch (sits inside D brake)
In the power flow diagram. The whole mess in the middle with all the squares are the planetary gears. Looks like 2 sun gears and the planet gears
Some clutches and brakes are active at the same time.....turning some gears and (brake) stopping others gears from turning.
This is a diagram of the valve body activity in its most basic form
Some are clutches to compress and turn gears and some clutches are for stopping the movement of gears (clutch brake)
Each clutch pack has fiber rings and steel rings that compress against each other inside this housing
Each clutch pach has a piston......the piston uses transmission fluid to compress the clutch packs
Each clutch pack is like the manual clutch on you manual transmission. Instead of having 1 large cluch like the manual does. It has 7 small ones that work the gears
On a manual transmission....you press the pedal to engage the cutch. On an automatic.....fluid uses a piston to press the clutch. A solenoid opens and let's the fluid through to compress piston. A likely culprit for problems
Each clutch pack is a wet clutch. They are wet with fluid.....a manual transmission is dry.
Each clutch pack has a solenoid that opens or closes allowing fluid or stopping fluid from getting to the piston to compress the clutch
Solenoid......4 eds solenoids. (Eds means......I don't know yet) variable voltage pulse
.......3 mv solenoids (mv means magnetic valves) 12 volts on/off
Each clutch pack housing has a round spring. When the solenoid closes.....it cuts off the fluid that is compressing the clutch pack. The spring returns the clutch pack to its original non compressed position.
Since eds solenoids are pwm (pressure wave modulated) here is a great link describing how they work. The tcm sends powers them on and off numerous times per minute or second.
http://www.sonnax.com/articles/115-Embracing-Change. The article explains that your solenoids now being put into newer cars are in blocks and cannot be replaced individually any more. Some are actually incorporating the tcm inside the transmission built into these solenoid blocks.....they call it mechatronics. Great for factory costs.....not great for us. One bad solenoid and you have a paper weight. The aftermarket is working on rebuilds. We have the 5hp19........the 6hp19 has this new set up. Looks like they added another gear and made working in it more complicated.....awesome!
There are speed sensors that tell the solenoids when to open.
Turbine speed sensor (turbine is one of the 4 parts in torque converter)
Output sensor......output shaft turns and sensor reads. Output shaft is what drive shaft connects to.