Changed transmission computer still have code 605 wont shift out of 2nd gear

This is from Repair Pal...just Google your code (P0758) to find other helpful suggestions

OBD-II Code P0758 is defined as a Shift Solenoid B Electrical 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. Shift solenoid B enables the transmission to shift from 2nd gear to 3rd gear. It does this by re-directing the flow of the transmission fluid which changes the position of the shift valves in the valve body.
When the code P0758 is set in the Powertrain Computer, it means that the Powertrain Computer or PCM is not seeing the specified rpm change that occurs during a shift from 2nd gear to 3rd gear. It's also not seeing the correct increase in road speed from the vehicle speed sensor.

P0758 Symptoms

• Check Engine Light will illuminate
• Vehicle will not shift from 2nd gear to 3rd gear properly
• Decrease in fuel economy
• In unusual cases, there are no adverse conditions noticed by the driver
• In some cases, there may be performance problems and possibly misfire-like symptoms

Common Problems That Trigger the P0758 Code

• Defective Shift Solenoid
• Defective Shift Solenoid wiring or connector
• Defective Valve Body
• Dirty transmission fluid that restricts the hydraulic passages

check tranny fluid level, if not possible faulty transmission control module if not codes related to tranny or issues with shift solenoids

Have a pin out test run on the wiring harness to the ****** from the TCM module.

For Automatic transmission problem,Check the list of help links below.click the link below:----Automatic transmission troubleshooting:----

http://howtobyme.blogspot.com/2011/11/automatic-transmission-will-not-go-into.html

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Automatic transmission shift lever issues?-------

http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html

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AUTOMATIC TRANSMISSION FLUID LEVEL? --

http://schematicsdiagram.blogspot.com/2011/07/how-to-check-automatic-transmission.html

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AUTOMATIC TRANSMISSION FLUID AND FILTER?

http://schematicsdiagram.blogspot.com/2011/07/how-to-change-automatic-transmission.html

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Transmission fault light on car dash?

http://schematicsdiagram.blogspot.com/2011/12/transmission-fault-light-on-car-dash.html

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Transmission shifting problem?

http://schematicsdiagram.blogspot.com/2012/01/transmission-shifting-problem-on-toyota.html

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Transmission Slips out of 2nd gear?

http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html

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OD light flashing and transmission fluid leaking?

http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html

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Why Transmission fluid leaks near radiator?

http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html

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transmission fluid leaking?

http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html

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****** wont go in reverse?

http://technoanswers.blogspot.in/2012/02/dodge-neon-wont-go-in-reverse.html

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Automatic transmission will not go into reverse?

http://technoanswers.blogspot.in/2012/02/dodge-automatic-transmission-will-not.html

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Transmission is making buzzing noise?

http://technoanswers.blogspot.in/2012/02/transmission-is-making-buzzing-noise.html

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This will help.

Thanks.

The transmission has gone into 'limp mode' by the sounds of it. When the transmission shifting control system stops working, it defaults to 2nd gear in order that you can still drive the vehicle, so that you can get it to a shop without a tow. The shifting of this transmission is controlled electronically.
Check the wiring and connectors for your transmission for any kind of damage, corrosion, etc. If you are blowing a turn signal fuse with Neutral, something for sure in there is short-circuited.

its possible the shifters linkage is bent

have the ecm and transmission computer scanned for codes. next check the trans. fluid level and color. if the fluid is dark brown to black and or smells burn't time for the trans. shop to look at it. hope i was able to help.

You have to scan it. The transmission is shifted by the computer and if it detects a problem, it defaults to 2nd gear and will not shift.

Can't do anything more without codes.

Try changing oil and filter. Also change speed / shift sensor if the oil and filter change doesn't do anything.