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Old 01-09-2011, 19:10   #1 (permalink)
sixshooter
 
Join Date: Nov 2010
Location: BC Canada
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2006 Sable 3.0 L

Transmission started to disengage when driving. Stopped and checked trans oil--nothing on stick. Code reads P0732 - gear 2 incorrect ratio.
Poured in 3.5 litre to fill it -- no leaks visible when stopped. Disappointment. It still kicks out and the engine revs soon as it hits second gear. I can still use low and reverse--that's it. Oil smells badly burnt.
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Old 01-10-2011, 07:54   #2 (permalink)
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Re: 2006 Sable 3.0 L

Quote:
Originally Posted by sixshooter View Post
Transmission started to disengage when driving. Stopped and checked trans oil--nothing on stick. Code reads P0732 - gear 2 incorrect ratio.
Poured in 3.5 litre to fill it -- no leaks visible when stopped. Disappointment. It still kicks out and the engine revs soon as it hits second gear. I can still use low and reverse--that's it. Oil smells badly burnt.
Hello 6:

P0732 Description
This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows:

Torque converter slip ratio = A x C/B

A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (2nd) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Incorrect transmission shifting
Possible Causes
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
When is the code detected?
P0732 is detected when A/T cannot be shifted to the 2nd gear position even if electrical circuit is good.
Tech Notes
Start by inspecting the transmission fluid level and condition, and change fluid if necessary.



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think a FSM would be helpful here, I couldn't copy and paste the diag chart
here is the section preceding it:

DTC P0732 will set if the PCM detects an incorrect actual 2nd gear ratio when 2nd gear is commanded On when:

The condition exists for longer than 3 seconds (2001)*
The condition exists for longer than 3 seconds, 1 minute is allowed to elapse, then condition again exists for longer than 3 seconds (2000)
The high main line pressure has been commanded
The transaxle is in a forward gear
The input speed is greater than 224 RPM
The vehicle speed is greater than 5 km/h (3 mph)
The speed noise parameter = NO
The steady state ratio fail counter equals 255 for an in-gear failure, or the shift fail counter is greater than 100 on a downshift or upshift to 2nd gear (128=0 or normal operation)
DTC P0732 diagnostic runs continuously once the above conditions have been met.

DTC P0732 is a type A DTC for 2000, type B for 2001.*

*Applicable to vehicles built after June 2000.

Diagnostic Aids

Important
If DTCs P0745, P0746, P0756, P0758, P0761, P0763, P0766, P0768 or P0789 is set, diagnose that DTC first. A diagnosed PC solenoid, shift solenoid 2, 3 or 4 low/high circuit fault DTC may have caused DTC P0732 to set.



Important
If any shift solenoid performance DTCs P0782 or P0783 3rd or 4th gear stuck On) are set, diagnose the highest gear first. A 3rd or 4th gear stuck On may cause no 2nd gear.


Refer to Pressure Ports - Air Check and Part Description for pressure apply points and for component/location description.

Possible causes of no 2nd gear are listed in the flowchart on the succeeding page.

Verify TRANSMISSION ISS and TRANSMISSION OSS read correctly on Scan tool.

Make sure the pressure control, shift 2, shift 3 and shift 4 solenoids are not intermittently sticking. Sticking shift solenoid 3 or 4 may cause 3rd or 4th gear to be applied from an initial start causing no 2nd gear. Audible sound should be similar for all solenoids. A muffled tone indicates the need for replacement.
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Good Luck and good repairing Sterling_6
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