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2008 3.7 motor starts and idles fine. Fine in park and neutral. Soon as you put it in gear it stalls out. It happened at the bottom of an off ramp and traffic was backing up. Finally it took off and I made it a 1/2 mile to work. Any ideas out there. Haven't left work yet.
 

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2008 3.7 motor starts and idles fine. Fine in park and neutral. Soon as you put it in gear it stalls out. It happened at the bottom of an off ramp and traffic was backing up. Finally it took off and I made it a 1/2 mile to work. Any ideas out there. Haven't left work yet.
First two things I'd suggest is check your fuel filter and your air filter;

Sounds like your engine is either starving for air or fuel - possibly both.

Could also be a bad fuel pump.

Are you getting any DTC's (Trouble Codes) in the EVIC?
 

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Since the engine dies when you put it in gear I would suggest you check the transmission fluid level first. The transmissions in these vehicles will actually cause the engine to stall if the fluid level is too low or the fluid pickup screen seal is bad or pickup screen assembly is cracked. When this happens the transmission locks up the torque converter not allowing enough slippage to allow the engine to idle.
 

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Made it home from work. It ran fine. But now I cant't trust it. Will check for codes on my scanner today. I have another vehicle to get to work. I will check the filters and check the transmission fluid. I think it must have been dirt in the fuel that blocked the fuel filter. Then when it settled it started back up. It has the original fuel pump in it at 200,000 miles. I might change it out. Thanks for the replies right away. At least I did not have to get towed. It is strange that it quit on the off ramp when I had to stop for traffic. Then it would not start for 5 or 6 tries and only had about 500 rpm each time and died when I put it in drive. Then all of a sudden it just went.
 

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Made it home from work. It ran fine. But now I cant't trust it. Will check for codes on my scanner today. I have another vehicle to get to work. I will check the filters and check the transmission fluid. I think it must have been dirt in the fuel that blocked the fuel filter. Then when it settled it started back up. It has the original fuel pump in it at 200,000 miles. I might change it out. Thanks for the replies right away. At least I did not have to get towed. It is strange that it quit on the off ramp when I had to stop for traffic. Then it would not start for 5 or 6 tries and only had about 500 rpm each time and died when I put it in drive. Then all of a sudden it just went.
That's a whole lot of miles to still be on the original fuel pump; I'd definitely recommend changing it out.
 

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Discussion Starter #7
transmission fluid check

So there is no transmission fluid dip stick. There are universal ones available. Does anyone know how many mm of fluid from the bottom of the dip stick there is suppose to be in the transmission. I want to buy a dip stick but have to know how long the universal one has to be.
 

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So there is no transmission fluid dip stick. There are universal ones available. Does anyone know how many mm of fluid from the bottom of the dip stick there is suppose to be in the transmission. I want to buy a dip stick but have to know how long the universal one has to be.
Why don't you just order the proper transmission dipstick if it's missing - instead of a universal one?
 

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The 3.7L WK's and XK's 2006-2010 came with the NAG1 Transmission. That comes without a dipstick, just a Fill Cap. There is no part number for a dipstick in the Jeep parts manuals. There is a service tool dipstick for dealers. The WK and XK Jeep Service Manuals have a procedure for checking the fluid level using the service dipstick tool.
There are aftermarket NAG1 dipsticks on the market-just do a Google search. But make sure its for your NAG1 model.

Edit to add:
There were a FEW 3.7L vehicles that were shipped with QDII instead of the normal QDI. I don't know whether they came with the NAG1 or the 545RFE transmission.
 
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