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Noisy gearbox

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Kevin D View Drop Down
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    Posted: 15 May 2018 at 10:49pm
Hi just joined today need help I’m loosing the will to live with my captiva 2012 2.2 ltz. Engine light came on got the car home found the radiator had a pin hole in it fitted a new rad now when the car changes down into 2nd it makes a whining noise when slowing down.   Any help would be very much appreciated   
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Aussie Ed View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Aussie Ed Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2018 at 3:40pm
You dont tell us mileage but at six years old it could be 50,000?
Did the engine overheat with punctured radiator?  Did the ATF (Automatic Transfer fluid) carry the task of trying to dissipate the overheat situation?  If so it might well be 'cooked' !
First thing I'd do is consider changing/flushing the old (possibly 'cooked') ATF and have new fluid installed.   This is a two part process to do thoroughly because there is old fluid trapped on the first drain down.  More on this in the forum if you want to read up. Use Search tab to help find.

ps: Do you have extended Warranty to protect possible gearbox failure?



Edited by Aussie Ed - 16 May 2018 at 3:41pm
Captiva Series II Auto diesel 2.2 litre LTZ White Pearl 61 plate 2012. Full Service history. 28,0000 miles as at Dec 2017
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Kevin D View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kevin D Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2018 at 10:53pm
Hi thanks but the car did not overheat only lost a small amount of water the mileage is 62000.    I can’t figure out why the noise is only in 2 nd when slowing down. Code for engine light is po700 (transmission fault) so it looks like I’m going to have to spend even more money and take it to a gearbox specialist. Thanks anyway
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Aussie Ed View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Aussie Ed Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2018 at 1:25am
Important to establish ALL codes recorded.

Do you also have code P0741 stored?
The following could be relevant:- note mention of fluid level / sediment / bends or damage to ATF radiator lines - were these damaged in replacing the main radiator?

P0700 Transmission Control Module Requested MIL Operation - With Automatic Transmission Possible Causes Setting Conditions 
•Perform the Diagnostic System Check for Vehicle Controls
•Refer to any trouble codes that are identified after the check is completed.

DTC P0802 not set; engine runtime over 7 seconds and the TCM requested that the MIL be illuminated. The transmission control module (TCM) uses the controller area network (CAN) to signal the ECM that the TCM is requesting malfunction indicator lamp (MIL) illumination. This happens when the TCM has determined that a failure that affects emissions has occurred in the transmission control system. When the ECM receives the correct message from the TCM, it sets DTC P0700.

P0741 TCC System - Stuck Off - With Automatic TransmissionPossible Causes Setting Conditions 
•ATF level is too low, or the fluid is burnt or contaminated
•Inspect transmission lines to radiator for bends or restrictions
•Oil pressure screen is clogged or debris in the oil pan
•TCC control valve is stuck "off" due to sediment or binding
•TCC regulator valve is stuck "off" due to sediment or binding
•TCC feed valve is stuck "off" due to sediment or binding

•TCC solenoid valve O-ring or turbine shaft seals leaking or cut
DTC P0107, P0108, P0120, P0220, P0716, P0717, P0742, P0842 and P0843 not set; engine runtime over 5 seconds, TP angle from 8-90%, TFT signal from 68-266ºF, engine torque more than 37 lb ft., commanded gear is 2nd, 3rd or 4th gear, TCC duty cycle more than 55% duty cycle for 5 seconds, and the TCM detected the TCC slip speed was over 200 rpm for 5 seconds. The torque converter clutch (TCC) solenoid valve is a pulse width modulation (PWM) solenoid. When vehicle operating conditions are appropriate for TCC application, the ECM begins the TCC duty cycle at about 42%. Then it increases the duty cycle up to 90%, in order to achieve full TCC apply pressure. With the TCC PWM solenoid valve de-energized, the solenoid blocks the filtered 2-3 drive fluid and allows TCC signal fluid to exhaust. When energized, the solenoid modulates fluid into the TCC signal fluid circuit. When fully energized, modulation stops, and the solenoid blocks both 2-3 drive fluid and TCC signal 


Do you also have code P0976 stored?
The following could be relevant:-

Transmission Code P0700 /P0976

Circuit Description
The 2-3 shift solenoid (SS) valve controls the transmission fluid pressure acting on the 1-2 and 2-3 shift valves to position the valves for the appropriate gear. The 2-3 SS valve is a normally open exhaust valve located on the lower control valve body. Ignition voltage is supplied to the solenoid. The transmission control module (TCM) commands the solenoid ON or OFF by providing a ground path. When the 2-3 SS valve is commanded ON, the TCM senses low voltage. When the 2-3 SS valve is commanded OFF, the TCM senses high voltage.

If the TCM detects a continuous open or short to ground in the 2-3 SS valve circuit, then DTC P0976 sets. DTC P0976 is a type A DTC.

DTC Descriptor
This diagnostic procedure supports the following DTC:

DTC P0976 2-3 Shift Solenoid (SS) Control Circuit Low Voltage

Conditions for Running the DTC
The engine is running for 5 seconds.

Conditions for Setting the DTC
The 2-3 SS valve feedback circuit indicates a continuous open or short to ground for 4.4 seconds.

Action Taken When the DTC Sets
• The TCM illuminates the malfunction indicator lamp (MIL). 

• The TCM commands a soft landing to 2nd gear. 

• The TCM commands maximum line pressure. 

• The TCM freezes transmission adaptive functions. 

• The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Freeze Frame and Failure Records. 

• The TCM stores DTC P0976 in TCM history.

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It could still be the "TCM", maybe the solenoid driver is bad. You will need somebody with a Tech II to command this solenoid. If you hear it click it's the transmission if you don't it's either or. Then you have to check at the TCM connector to see if "TCM" gives the command. If it does it's the solenoid if it doesn't it's the "TCM".
Captiva Series II Auto diesel 2.2 litre LTZ White Pearl 61 plate 2012. Full Service history. 28,0000 miles as at Dec 2017
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