FAST99Z

Just had my car in for LS1 edit , dyno tuning, and a check on the differential. Told the differential was fine and to ignore the thumping on the 1-2 shift and downshift. Now I am getting PO751 code with stuck shift solonoid 1-2.


How bad is this??

FAST99Z

This IS bad isn't it?

FAST99Z

ttt

jimmy 2 Times

iTrader: (18)

well i have a P0803, 1-4 shift solonoid, and i can't get my car into reverse without jamming it in, is your situation the same??

jimmy

FAST99Z

My 1-2 shift and 2-1 downshift have been hitting with a thump for two months. Had it inspected three times without finding the problem. Took the car out of shop last week, thump has worsened and read the codes last night.

At first it was a hard shift, then a stronger thump, now a hard thump followed by a growl.

Need to get this fixed, someone, tell me what is involved in changing a solenoid, and how much a shop will charge to get it done.

FAST99Z

ttt

FAST99Z

tttop

Sunset01TA

iTrader: (7)

ttt like to know this also

SLawson86

iTrader: (8)

Long post, but this should help

Conditions for Setting the DTC

No TP DTCs P0122 or P0123
No VSS DTC P0502
No TCC Stuck ON DTC P0742
No 1-2 SS Valve DTC P0753
No 2-3 SS Valve DTC P0758
No TFP Val Position Sw DTC P1810
No 3-2 Shift Solenoid Valve Assembly DTC P1886
The gear range is D4.
The vehicle speed is greater than 8 km/h (5 mph).
The transmission fluid temperature is between 20° and 130°C (68° and 266°F).
The traction control is not active.
All the above conditions have been met and the combination of Conditions 1,2,3, and 4 or 1,2,3, and 5 occurs two consecutive times:

Condition 1

Commanded 1-2 shift
The TP angle is between 17 and 42%.
The TP angle is constant within +/-3%.
Vehicle speed is between 8 and 48 km/h (5 and 30 mph).
Within 2.5 seconds, the engine speed in 2nd gear must be 150 RPM greater than the last speed in 1st gear.

Condition 2

Commanded 2-3 shift
The TP angle is between 17 and 32%.
The TP angle is constant within +/-5%.
Vehicle speed is between 32 and 72 km/h (20 and 45 mph).
Within 1.7 seconds, the engine speed in 3rd gear must be 75 RPM less than the last speed in 2nd gear.

Condition 3

Commanded 3-4 shift
The TP angle is between 17 and 30%.
The TP angle is constant within +/-3%.
The vehicle speed is between 45 and 105 km/h (28 and 65 mph).
Within 3 seconds, the engine speed in 4th gear must be 20 RPM greater than the last speed in 3rd gear.

Condition 4

Commanded 4th gear
The TCC is ON.
The TP angle is between 13 and 26%.
The speed ratio is between 0.85 and 1.2 (the speed ratio is the engine speed ÷ the output speed).
The TCC slip speed is 300-2000 RPM for greater than 4 seconds.

Condition 5

Commanded 4th gear
The TCC is ON.
The TP is between 13 and 26%.
The Speed ratio is between 0.5 and 0.788 (the speed ratio is the engine speed ÷ the output speed).
The TCC slip speed is -20 to 20 RPM for greater than 4 seconds.

Action Taken When the DTC Sets

The PCM commands D2 line pressure
The PCM freezes shift adapts from being updated.
The PCM illuminates the Malfunction Indicator Lamp (MIL).

(That should tell you exactly what it is, what causes it to come on, and what happens)

SLawson86

iTrader: (8)

if you really want to clear it up, take down the transmission pan, its the solenoid on the driver side of the transmission. take it out, use some brake clean and clean the shift valve also, and put it all back together. common problem in a 4L60-E. the part is about 10 bucks and then get a pan gasket. should fix ya right up

SLawson86

iTrader: (8)

post any more questions and ill try to help you out