P0736 Buick Gear Ratio Error In Reverse Gear
Possible causes
– Low transmission fluid level
– Dirty transmission fluid
– Shift solenoids
– Transmission mechanical problems
– Transmission hydraulic control circuit
– Dirty transmission fluid
– Shift solenoids
– Transmission mechanical problems
– Transmission hydraulic control circuit
Tech description
Start by inspecting the transmission fluid level and condition, and change fluid if necessary.
What about the obd code?
The ECM has detected that the transmission input RPM does not match the transmission output RPM under known conditions
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Incorrect transmission shifting
– Incorrect transmission shifting
P0736 Buick 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
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