Question about 1991 Nissan 240SX

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Auto Transmission wont shift out of 2nd gear

My transmission was recently rebuilt. The mechanic is telling me it wont shift out of 2nd gear because he suspects a faulty speed sensor.
He says that the car has three of them and he's not sure which one it is.Which one of the three causes the transmission to shift at the correct speeds? There is a speedometer sensor, a vehicle speed sensor and a speed sensor. Can anyone help.
Thanks,
Curt

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If my 1990 gmc sierra 1500 2wd automatic 5.7 wont shift past 2nd is it possible that if I just replace the torque converter that it will be good as new or do I have to change the whole transmission


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the torque converter has nothing to do with the gear shifting and unless the transmission is making weird and funny noises , there is every possibility that it is still good
the procedure that you should be following here is to have the fault codes read as it may be a servo/ solenoid that is faulty , a VSS ( vehicle speed sensor) that is faulty or a TCM ( transmission control module ) that is faulty
All of these pieces control gear shifting so the second gear or 3rd gear servo may be out or the TCM is not shifting the ratio
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Interrogate ecu using atologic P0732 Gear 2 incorrect ratio P07667 shift Sol d


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OBD II Fault Code
  • OBD II P0732
Fault Code Definition
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What does this mean?
The purpose of the automatic transmission is to match the engine's optimum power and torque characteristics to the driver's desired rate of acceleration and speed by auto-selecting different gear ratios or 'speeds' to power the wheels.
Code P0732 When the code P0732 is set in the Powertrain Computer, it means that the Powertrain Computer or PCM is seeing a greater than a specified RPM difference between the rotational speed of the Input RPM Sensor and the Transmission Output RPM Sensor when the vehicle is in 2nd gear. This can occur during shifting or when driving at steady speeds. It often implies that the transmission is slipping.
Symptoms
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Common Misdiagnoses
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Polluting Gases Expelled
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  • CO (Carbon Monoxide): Partially burned fuel that is an odorless and deadly poisonous gas
  • NOX (Oxides of Nitrogen): One of the two ingredients that, when exposed to sunlight, cause smog
P0732 Diagnostic Theory for Shops and Technicians
When diagnosing a P0732 code, it is important to record the freeze frame information and then to duplicate the code setting conditions with a test drive. Pay close attention to the engine load, throttle position, RPM, and road speed because a P0732 can be difficult to detect.
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http://repairhelpcenter.blogspot.in/2012/02/car-will-not-move-when-in-gear.html ---- transmission sticks in first gear? http://technoanswers.blogspot.com/2012/01/mercedes-benz-transmission-sticks-in.html ----- Transmission not engaging in first gear? http://technoanswers.blogspot.com/2012/01/mercedes-benz-not-engaging-in-first.html ----- Vehicle only goes in First gear?

http://howtobyme.blogspot.com/2011/11/chrysler-pt-cruiser-only-goes-in-first.html


----

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http://howtobyme.blogspot.com/2011/11/car-will-not-come-out-of-park.html

-----
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http://schematicsdiagram.blogspot.com/2011/12/shift-indicator-directly-goes-to-2nd.html
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http://schematicsdiagram.blogspot.in/2012/02/2000-nissan-maxima-shifts-hard.html
------- Vehicle noticed sluggish delayed shifts while driving?

http://schematicsdiagram.blogspot.in/2012/03/vehicle-noticed-sluggish-delayed-shifts.html

-------

This will help.

Thanks.

Mar 14, 2012 | 1999 Chevrolet Silverado 1500

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