2006 PT w/ manual transmission won't go into gear when it's hot

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If the gear lever has a normal travel and feel and there is an absence of noise or vibration it is more likely the cause is with the clutch than the transmission.

if you mean range sensor is in side the transmision atached to the valve body

You could try the linkage cable from the shifter(under the hood). It could be alot of things. Is it auto or manual trans? And what do you mean by wont shift? Is the the shifter moving from P,R,N,D, ect... or the transmission is not shifting into a higher gear?

Can be issue with transmission or its related components.Many car models face such problems.

For complete step by step troubleshooting,few help links are provided below.Click the link below and go through its procedure to resolve the problem:----
Engine misses and truck jumps? Hard to down shift? Issue with high gear only? http://technoanswers.blogspot.in/2012/02/engine-miss-and-truck-jumps-hard-to.html

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Car sitting for year, now will not crank and go in gear? http://repairhelpcenter.blogspot.com/2012/01/car-sitting-for-yearnow-will-not-crank.html

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2004 Peugoet: Clutch not going in gears?
http://whoisbyme.blogspot.in/2012/05/peugeot-307-clutch-will-no-go-in-gears.html

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Engine stumbles and shuts off in forward gear on Toyota Land Cruiser? http://schematicsdiagram.blogspot.com/2012/01/engine-stumbles-and-shuts-off-in.html

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Transmission problem? http://schematicsdiagram.blogspot.com/2012/01/transmission-problem.html

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Car engine Overheats and transmission starts slipping?

http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html

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Manual Transmission Clutch System Failures?

http://repairhelpcenter.blogspot.com/2011/11/manual-transmission-clutch-system.html

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

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Manual transmission very hard to shift from one gear to another? http://repairhelpcenter.blogspot.com/2012/01/manual-transmission-very-hard-to-shift.html

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Dodge manual transmission will not go in reverse gear? http://technoanswers.blogspot.in/2012/02/dodge-manual-transmission-will-not-go.html

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2006 Chrysler 300c: Shifter Stuck in Park? http://technoanswers.blogspot.in/2012/06/2006-chrysler-300c-shifter-stuck-in.html
---------- 1998 Ford Expedition: Will not Shift Out of Park? http://schematicsdiagram.blogspot.in/2012/06/1998-ford-expedition-will-not-shift-out.html
---------- Car will not move when in gear?

http://repairhelpcenter.blogspot.in/2012/02/car-will-not-move-when-in-gear.html

----------- Mercedes-Benz transmission sticks in first gear? http://technoanswers.blogspot.com/2012/01/mercedes-benz-transmission-sticks-in.html
---------- Mercedes Benz not engaging in first gear? http://technoanswers.blogspot.com/2012/01/mercedes-benz-not-engaging-in-first.html
--------- Chrysler PT Cruiser only goes in First gear?

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

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Car is stuck in park and the shift will not move?
http://howtobyme.blogspot.com/2011/08/car-is-stuck-in-park-and-shift-will-not.html

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These details will help.Keep updated for more help.
Thanks.

OK... brains are expensive. It sounds like your PT STARTS OK, but keeps your TRANSMISSION locked.

Many transmissions have a 'lock' that is coupled to the car BRAKES. So the transmission may not allow SHIFTING if the BRAKE SWITCH is not sensed as 'brakes applied'.

APPLIED BRAKES = OK TO START/SHIFT. So it's possible a defective switch is your problem?

Find really GREAT information here:

How To Solve The PT Cruiser Transmission Problems

And there is this: "You Probably have a 604 41 TE auto trans (this is a four speed automatic trans)and if this is the case. Then you need to have the input and the output turbine sensor's replaced,(aka speed sensor) same thing different name. These sensors are cheap and have a high failure rate due to high temps the trans produces."

Now see this:
Transmission not shifting 2001 Chrysler PT Cruiser

and more here:

How to replace 41 TE auto transmission in an 01 pt cruiser neon pt 1

While you are at YOUTUBE search for:
"PT Cruiser Automatic transmission" won't shift

Anthony

is this a manual or a auto version ,if a auto then post question to a american expert ,only manuals here in spain

2007 pt crusier Hard shifting manual 5 speed transmission in warm weather

is it idling higher with a/c on may need a clutch how many miles on it what make and model?

This is Either the Water Pump or the Thermostat.