Originally Posted by skprodz

Hello,

The Issue: At Very very very very soft acceleration, car goes into 3rd, then around 25mph it feels like it's about to go into 4th but it doesn't and starts jerking around vibrating the car, eventually as a little more speed picks it will go into 4th then 5th normally.
If I use a bit more pace and get to 35mph when it goes into 4 it goes normal as does 5 and everything else. When using really light throttle it's really annoying. Oh and this only happens when its up at operating temp..

How i repaired it:
1- I changed transmission filter, oil, filled with 7 quart at 35C
Conclusion: i tought it was okay, but problem occured again.
2- I drained oil again, thinking it was too duty, filled with 4.6quart
Conclusion: Did not fix it.

So i'v started my car (cold) and logged a run until problem occurs.

Torque increase Engine RPM Gear engaged Acceleration ATF Temp TCC Solenoid Torque conv. TC stall speed PC Valve 1 PC Valve 2 PC Valve 3 Pr Reg Valve 5
TIME in TC m/sec/sec TIME N218 (TCC-2345) clutch TIME N215 (All Gears) N216 (RN135-2/1) N217 (RN123-2/1 5/4) N233 (RN12-2/1)
Marker STAMP /min m/s^2 STAMP °C A /min STAMP A A A A
0.02 1.00 1120 5 24.811 0.28 66.0 0.448 Torq.Conv.Reg 96 0.55 0.736 0.800 0.096 0.096
0.84 1.00 1088 5 0.000 1.11 67.0 0.496 Torq.Conv.Reg 160 1.40 0.736 0.800 0.096 0.096
1.68 1.04 1280 5 0.292 1.95 66.0 0.544 Torq.Conv.Reg 160 2.24 0.736 0.800 0.096 0.096
2.52 1.00 1088 5 0.486 2.80 66.0 0.536 Torq.Conv.Reg 0 3.08 0.736 0.800 0.096 0.096
3.37 1.03 1312 5 0.389 3.64 66.0 0.544 Torq.Conv.Reg 128 3.92 0.736 0.800 0.096 0.096
4.21 1.00 1120 5 0.486 4.48 65.0 0.528 Torq.Conv.Reg 96 4.77 0.736 0.800 0.096 0.096
5.05 1.00 1248 5 0.486 5.33 64.0 0.536 Torq.Conv.Reg 64 5.61 0.736 0.800 0.096 0.096
5.89 1.00 1344 5 0.292 6.17 64.0 0.536 Torq.Conv.Reg 224 6.45 0.736 0.800 0.096 0.096
6.74 1.00 1248 5 0.486 7.01 64.0 0.520 Torq.Conv.Reg 0 7.30 0.736 0.800 0.096 0.096
7.57 1.01 1440 5 0.389 7.85 64.0 0.464 Torq.Conv.Reg 160 8.14 0.736 0.800 0.096 0.096
8.41 1.00 1248 5 24.811 8.70 65.0 0.408 Torq.Conv.Reg 0 8.98 0.736 0.800 0.096 0.096
9.25 1.00 1184 5 24.714 9.54 65.0 0.408 Torq.Conv.Reg 0 9.82 0.736 0.800 0.096 0.096



When torq is in "conv.reg" mod, the vibration/hunting begin at light trottle. But in torq OPEN, everything was fine.

3- Fixing the problem bypass of the conv.reg mod. Conv.reg is only applyed when tranny oil reach 20 degree celcius.

Near the TCU, i cutted wire 21 and 22 ( the temperature oil sensor wire ) and put a resistance of 889ohm 2watt. This make the TCU think oil is at 12degree celius. No limp mod, no check engine, and tranny now operating like a charm. at 60km/h , light trottle, no more vibration in fourth or fifty gear at about 1150rpm.

Originally Posted by odoboyusa

Disabling the torque converter lockup clutch will cause the fluid to heat up A LOT more than it used to. All the slippage of the TCC (several hundred rpm) turns into heat.

Here's a different solution for a finicky torque converter clutch:
http://nefariousmotorsports.com/foru...p?topic=3160.0
It's a resistor in parallel on the current sense resistor for the TCC pressure valve. This will put more pressure on the clutch. I've done this for a friend and it worked wonders.
It seems the TCU does absolutely no closed loop adjustment of the pressure, just a dumb preset value. I've added 0.25w 10ohm resistors in parallel to with the P4 resistor in the picture. In my case I added four. I added one at a time and test drove.

If you're dealing with the seal issue, then this will not work for you, the seal let's all pressure out.

Originally Posted by skprodz

3- Fixing the problem bypass of the conv.reg mod. Conv.reg is only applyed when tranny oil reach 20 degree celcius.

Near the TCU, i cutted wire 21 and 22 ( the temperature oil sensor wire ) and put a resistance of 889ohm 2watt. This make the TCU think oil is at 12degree celius. No limp mod, no check engine, and tranny now operating like a charm. at 60km/h , light trottle, no more vibration in fourth or fifty gear at about 1150rpm.