Excessive transmission hunting or stumbles? - Saturn Outlook Online Community
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post #1 of 12 (permalink) Old 09-03-2011, 08:14 PM Thread Starter
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Excessive transmission hunting or stumbles?

Usually at the low end of the high gear, the transmission starts doing this herky jerky thing where it almost feels like a fuel pickup issue. Car will not just shift down. Just stumbles.

Big issue on low grade inclines. I'll have the cruise set on 70 and when I start to climb the hill the Outlook starts in. I either have to punch it or shift down manually.

Of course I took it to the dealer and they couldn't recreate the problem. I can recreate it at will.

Anybody else experience this?
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post #2 of 12 (permalink) Old 09-09-2011, 11:01 AM
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Re: Excessive transmission hunting or stumbles?

Never experienced this in my '09 MY Outlook. There are TCM updates out there, maybe have the dealer check to see if your trans is running the latest available TCM flash update. This is for 'driveability' so they shouldn't have any issues doing the work if it's under warranty. The service tech will just hookup their TECH II and update the TCM.

I do notice with mine that there is a reluctance for the torque converter to unlock and the transmission to then 'down-shift' when I give a bit more gas. The TC stays locked and the vehicle does accelerate, but at a much slower pace than expected. The trans flash update will correct this behaviour I believe. Others have reported a "flat spot" at the 3 - 4 shift when under moderate to heavy acceleration. Again, TCM update should fix these driveability concerns.

Not sure if your issue is exactly this. But ensuring you're on the latest TCM is probably a step in the right direction.

As for not replicating the problem, my local dealer doesn't road test the vehicle out on the highway, they just take it around the local roads in the surrounding area. It can be frustrating when this happens, but persistence pays off.


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post #3 of 12 (permalink) Old 09-20-2011, 07:54 AM Thread Starter
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Re: Excessive transmission hunting or stumbles?

Turns out it is probably not the transmission but rather the fuel injectors or the coils.

Code 0305, Engine Misfire Cylinder 5.

Has anyone had this? What was the cause for you?
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post #4 of 12 (permalink) Old 09-20-2011, 01:43 PM
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Re: Excessive transmission hunting or stumbles?

bad coil usually. the good thing is its pointing to a certain coil. and not a random code of P0300- where you dont know whos is misfiring.
sometimes its the plug.

Look in the Enclave forum- as Ive seen more misfire/coil issues there than the Traverse or Acadia forum.

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post #5 of 12 (permalink) Old 09-20-2011, 04:07 PM
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Re: Excessive transmission hunting or stumbles?

From what I've seen over on the other forums it's usually the #5 coil that goes bad, I wonder why?




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post #6 of 12 (permalink) Old 09-20-2011, 05:06 PM
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Re: Excessive transmission hunting or stumbles?

Curious, would a coil be covered by the 5/100 powertrain warranty, assuming the B2B has expired?




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post #7 of 12 (permalink) Old 09-20-2011, 07:40 PM
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Re: Excessive transmission hunting or stumbles?

Quote:
Originally Posted by salguod
Curious, would a coil be covered by the 5/100 powertrain warranty, assuming the B2B has expired?
My guess is NOTTA NOPE NILCH


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post #8 of 12 (permalink) Old 09-20-2011, 07:58 PM Thread Starter
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Re: Excessive transmission hunting or stumbles?

It was P0305. They replaced the coil.

Why is it #5 most of the time?
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post #9 of 12 (permalink) Old 09-20-2011, 10:13 PM
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Re: Excessive transmission hunting or stumbles?

Don't know...I had coil #5 done.
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post #10 of 12 (permalink) Old 09-21-2011, 09:19 AM
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Re: Excessive transmission hunting or stumbles?

According to the information that I have available to me, the Powertrain Warranty covers the engine, transmission, transfer case and axle assemblies on light duty vehicles.

The engine coverage includes: All internally lubricated parts, the entire pressurized fuel system (in-tank fuel pump, pressure lines, fuel rail(s), regulator, injectors and return line). Also included are all actuators and electrical components internal to the engine (i.e.: Active Fuel Management Valve Lifter Oil Manifold, etc.) as well as the Engine/Powertrain Control Module, module programming, cylinder head, block, timing gears, timing chain, timing cover, oil pump/oil pump housing, OHC carriers, valve covers, oil pan, seals, gaskets, manifolds, flywheel, water pump, harmonic balancer, engine mount, starter motor, turbocharger and supercharger. Timing belts are covered until the first scheduled maintenance interval.

Exclusions: Excluded from the powertrain coverage are sensors, wiring, connectors, engine radiator, coolant hoses, fans, coolant and heater core. Coverage on the engine cooling system begins at the inlet to the water pump and ends with the thermostat housing and/or outlet that attaches to the return hose. Also excluded are engine oil cooling hoses and radiators.

Transmission/Transaxle Coverage Includes: All internally lubricated parts, case, torque converter, mounts, seals and gaskets as well as any electrical components internal to the transmission/transaxle. Also covered are any actuators directly connected to the transmission (Slave cylinder, etc.) as well as any Transmission Control Module and/or module programming.

Exclusions: Excluded from the powertrain coverage are transmission cooling lines, hoses, radiator, sensors, wiring and electrical connectors.

The Transfer Case Coverage Includes: All internally lubricated parts, case, mounts, seals and gaskets as well as any electrical components internal to the transfer case. Also covered are any actuators directly connected to the transfer case (Slave cylinder, etc.) as well as encoder motor, transfer case control modules and/or module programming.

Exclusions: Excluded from the powertrain coverage are transfer case cooling lines, hoses, radiator, sensors, wiring and electrical connectors.

The Drive Systems Coverage Includes: All internally lubricated parts, final drive housings, axle shafts and bearings, constant velocity joints, propeller shafts, universal joints, wheel bearings, front and rear hub bearings, locking hubs, mounts, supports, seals, gaskets as well as any electrical components internal to the drive axle. Also covered are any actuators directly connected to the drive axle (i.e.: front differential actuator, etc.) as well as any transmission control module and/or module programming.

Exclusions: Excluded from the powertrain coverage are drive system cooling, lines, hoses, radiator, sensors, wiring and electrical connectors related to drive systems.

To confirm warranty information about any of your particular situations, you will want to contact the warranty specialist at your local General Motors dealership.

Michelle, GM Customer Service

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