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john aka eautp
john aka eautp, ASE Certified Technician
Category: Infiniti
Satisfied Customers: 15700
Experience:  16 years ase certified
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I have a 2001 infinity qx4. 129000 miles. check engine light

Customer Question

i have a 2001 infinity qx4. 129000 miles. check engine light is on and reads tourqe converter code.
Symptoms are shuttering while driving intermittently over 45mph. Now is progressing to a jerk when vehicle is in park, and engine is turned off, a sudden jerk from tranny as soon as engine cuts off. Are these the symptons of a tourqe converter before I spend money in this job?
Thanks. Robert
Submitted: 6 months ago.
Category: Infiniti
Expert:  john aka eautp replied 6 months ago.

Hi . Thank you for asking your question on JustAnswer. exact code number?

Thank you again for trusting us with your problem. John aka eauto

Customer: replied 6 months ago.
Expert:  john aka eautp replied 6 months ago.

P0744 code is for improper lockup operation. Normally when you get this code it means the transmission has a internal failure.

The shutter is generally converter failure

Possible causes for this code is Torque converter and or clutch solenoid on the valve body, a bad clutch in the trans or Hydraulic control issue.

Customer: replied 6 months ago.
That's what i was thinking also. Best solutions before it deteriorates is to replace the torque converter?
Also is there any other things that I should try first before going through with this process? (changing clutch solenoid or swaping out TCM)
Expert:  john aka eautp replied 6 months ago.

exactly.. no it sounds like converter... id drain the fluid and look for conatmination first..if converter debris is in the transmission...the transmission will need a full rebuild....
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Customer: replied 6 months ago.
ok thanks will five star you on Thursday.
Robert Thanks
Expert:  john aka eautp replied 6 months ago.


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