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2.4l Turbo Discussion of the 2.4l turbo

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Old 07-12-2008, 10:04 PM   #1
PT Cruiser Turbo-Octane rating, trans types  
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I have 2 questions revolving PT Cruiser Turbos. I see that there is a 180 hp turbo in the Limited, and then the GT has a 230hp turbo. Here are my 2 questions:

What octane rating does Chrysler recommend for each engine?

Is the auto trans. for the GT beefed up compared to the 180 turbo? I know the engine internally has much beefier stuff.

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Patrick
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Old 07-13-2008, 12:25 AM   #2
Re: PT Cruiser Turbo-Octane rating, trans types  
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I do not own a PT/Neon and am not very familar with them but I looked up your info on Dealer Connect and to my surprise Chrysler recommends 87 Octane for the 2.4L Turbo and 2.4L HO Turbo. All newer Chrysler vehicles will have a label on the fuel door for vehicles requiring Premium Fuel.
As far as the transmissions Chrysler shows the 40TE and the 41TE having the same identical specs so I have no idea if there are internal differences.

FUEL REQUIREMENTS
Your engine is designed to meet all emissions regulations and provide excellent fuel economy and performance when using high quality unleaded gasoline having an octane rating of 87. The use of premium gasoline is not recommended. The use of premium gasoline will provide no benefit over high quality regular gasoline, and in some circumstances may result in poorer performance.

Light spark knock at low engine speeds is not harmful to your engine. However, continued heavy spark knock at high speeds can cause damage and immediate service is required. Engine damage resulting from operation with a heavy spark knock may not be covered by the new vehicle warranty.

Poor quality gasoline can cause problems such as hard starting, stalling and hesitations. If you experience these symptoms, try another brand of gasoline before considering service for the vehicle.

Over 40 auto manufacturers world-wide have issued and endorsed consistent gasoline specifications (the Worldwide Fuel Charter, WWFC) to define fuel properties necessary to deliver enhanced emissions, performance and durability for your vehicle. We recommend the use of gasolines that meet the WWFC specifications if they are available.

REFORMULATED GASOLINE
Many areas of the country require the use of cleaner burning gasoline referred to as “reformulated” gasoline. Reformulated gasoline contain oxygenates, and are specifically blended to reduce vehicle emissions and improve air quality.

We strongly support the use of reformulated gasoline. Properly blended reformulated gasoline will provide excellent performance and durability for the engine and fuel system components.

GASOLINE/OXYGENATE BLENDS
Some fuel suppliers blend unleaded gasoline with oxygenates such as 10% ethanol, MTBE, and ETBE. Oxygenates are required in some areas of the country during the winter months to reduce carbon monoxide emissions. Fuels blended with these oxygenates may be used in your vehicle.

CAUTION: DO NOT use gasoline containing METHANOL. Gasoline containing methanol may damage critical fuel system components.

MMT IN GASOLINE
MMT is a manganese-containing metallic additive that is blended into some gasoline to increase octane. Gasolines blended with MMT provide no performance advantage beyond gasoline of the same octane number without MMT. Gasolines blended with MMT reduce spark plug life and reduce emission system performance in some vehicles. We recommend that gasoline free of MMT be used in your vehicle. The MMT content of gasoline may not be indicated on the gasoline pump; therefore, you should ask your gasoline retailer whether or not his/her gasoline contains MMT.

It is even more important to look for gasoline without MMT in Canada because MMT can be used at levels higher than allowed in the United States. MMT is prohibited in Federal and California reformulated gasoline.

SULFUR IN GASOLINE
If you live in the northeast United States, your vehicle may have been designed to meet California low emission standards with Cleaner-Burning California reformulated gasoline with low sulfur. If such fuels are not available in states adopting California emission standards, your vehicles will operate satisfactorily on fuels meeting federal specifications, but emission control system performance may be adversely affected. Gasoline sold outside of California is permitted to have higher sulfur levels which may affect the performance of the vehicle's catalytic converter. This may cause the Malfunction Indicator Lamp (MIL), Check Engine or Service Engine Soon light to illuminate. We recommend that you try a different brand of unleaded gasoline having lower sulfur to determine if the problem is fuel related prior to returning your vehicle to an authorized dealer for service.

CAUTION: If the Malfunction Indicator Lamp (MIL), Check Engine or Service Engine Soon light is flashing, immediate service is required; see on-board diagnostics system section.

MATERIALS ADDED TO FUEL
All gasoline sold in the United States and Canada is required to contain effective detergent additives. Use of additional detergents or other additives is not needed under normal conditions.

FUEL SYSTEM CAUTIONS
CAUTION: Follow these guidelines to maintain your vehicle's performance:

The use of leaded gas is prohibited by Federal law. Using leaded gasoline can impair engine performance, damage the emission control system, and could result in loss of warranty coverage.
An out-of-tune engine, or certain fuel or ignition malfunctions, can cause the catalytic converter to overheat. If you notice a pungent burning odor or some light smoke, your engine may be out of tune or malfunctioning and may require immediate service. Contact your dealer for service assistance.
When pulling a heavy load or driving a fully loaded vehicle when the humidity is low and the temperature is high, use a premium unleaded fuel to help prevent spark knock. If spark knock persists, lighten the load, or engine piston damage may result.
The use of fuel additives which are now being sold as octane enhancers is not recommended. Most of these products contain high concentrations of methanol. Fuel system damage or vehicle performance problems resulting from the use of such fuels or additives is not the responsibility of DaimlerChrysler Corporation and may not be covered under the new vehicle warranty.
NOTE: Intentional tampering with emissions control systems can result in civil penalties being assessed against you.

DESCRIPTION
The 40TE(40TE Automatic Transaxle) is a four-speed transaxle that is a conventional hydraulic/mechanical assembly with an integral differential, and is controlled with adaptive electronic controls and monitors. The hydraulic system of the transaxle consists of the transaxle fluid, fluid passages, hydraulic valves, and various line pressure control components. An input clutch assembly which houses the underdrive, overdrive, and reverse clutches is used. It also utilizes separate holding clutches: 2nd/4th gear and Low/Reverse. The primary mechanical components of the transaxle consist of the following:

Three multiple disc input clutches
Two multiple disc holding clutches
Four hydraulic accumulators
Two planetary gear sets
Hydraulic oil pump
Valve body
Solenoid/Pressure switch assembly
Integral differential assembly
Control of the transaxle is accomplished by fully adaptive electronics. Optimum shift scheduling is accomplished through continuous real-time sensor feedback information provided to the Powertrain Control Module (PCM) or Transmission Control Module (TCM).

The PCM/TCM is the heart of the electronic control system and relies on information from various direct and indirect inputs (sensors, switches, etc.) to determine driver demand and vehicle operating conditions. With this information, the PCM/TCM can calculate and perform timely and quality shifts through various output or control devices (solenoid pack, transmission control relay, etc.).

The PCM/TCM also performs certain self-diagnostic functions and provides comprehensive information (sensor data, DTC's, etc.) which is helpful in proper diagnosis and repair. This information can be viewed with the DRB scan tool.

TRANSAXLE IDENTIFICATION
The 40TE transaxle is identified by a barcode label (1)(Transaxle Identification Label) that is fixed to the transaxle case.

The label contains a series of digits that can be translated into useful information such as transaxle part number, date of manufacture, manufacturing origin, plant shift number, build sequence number, etc. Refer to(Identification Label Breakdown) for identification label breakdown.
If the tag is not legible or missing, the “PK” number, which is stamped into the transaxle case behind the transfer gear cover, can be referred to for identification. This number differs slightly in that it contains the entire transaxle part number, rather than the last three digits.

DESCRIPTION
The 41TE (41TE Automatic Transaxle) is a four-speed transaxle that is a conventional hydraulic/mechanical assembly with an integral differential, and is controlled with adaptive electronic controls and monitors. The hydraulic system of the transaxle consists of the transaxle fluid, fluid passages, hydraulic valves, and various line pressure control components. An input clutch assembly which houses the underdrive, overdrive, and reverse clutches is used. It also utilizes separate holding clutches: 2nd/4th gear and Low/Reverse. The primary mechanical components of the transaxle consist of the following:

Three multiple disc input clutches
Two multiple disc holding clutches
Four hydraulic accumulators
Two planetary gear sets
Hydraulic oil pump
Valve body
Solenoid/Pressure switch assembly
Integral differential assembly
Control of the transaxle is accomplished by fully adaptive electronics. Optimum shift scheduling is accomplished through continuous real-time sensor feedback information provided to the Powertrain Control Module (PCM) or Transmission Control Module (TCM).

The PCM/TCM is the heart of the electronic control system and relies on information from various direct and indirect inputs (sensors, switches, etc.) to determine driver demand and vehicle operating conditions. With this information, the PCM/TCM can calculate and perform timely and quality shifts through various output or control devices (solenoid pack, transmission control relay, etc.).

The PCM/TCM also performs certain self-diagnostic functions and provides comprehensive information (sensor data, DTC's, etc.) which is helpful in proper diagnosis and repair. This information can be viewed with the DRB scan tool.

TRANSAXLE IDENTIFICATION
The 41TE transaxle is identified by a barcode label (1)(Transaxle Identification Label) that is fixed to the transaxle case.

The label contains a series of digits that can be translated into useful information such as transaxle part number, date of manufacture, manufacturing origin, plant shift number, build sequence number, etc. Refer to above(Identification Label Breakdown) for identification label breakdown.

If the tag is not legible or missing, the “PK” number, which is stamped into the transaxle case behind the transfer gear cover, can be referred to for identification. This number differs slightly in that it contains the entire transaxle part number, rather than the last three digits.
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Old 07-13-2008, 11:15 PM   #3
Re: PT Cruiser Turbo-Octane rating, trans types  
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The dealer connect is right from Chrysler, right? I had a Dakota R/T and everyone swore it used premium, but my owner's manual said 87 octane and no more, too!

I'm considering one of these, and I'll take the 50hp more if it comes with regular unleaded requirements. But, if it means another 30-40 cents a gallon to get it, I wouldnt do it.

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Old 07-14-2008, 04:20 AM   #4
Re: PT Cruiser Turbo-Octane rating, trans types  
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Yes, Dealer Connect is Chrysler.
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Old 07-15-2008, 08:55 PM   #5
Re: PT Cruiser Turbo-Octane rating, trans types  
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Now, my 2003 GT recomends premium. If you are looking at the older models. (it has the forementioned sticker stating it) can't tell you if manual says so since mine didn't have one.
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Old 09-13-2008, 09:10 AM   #6
Re: PT Cruiser Turbo-Octane rating, trans types  
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I have an 05GT (HO version)that I recently purchased. I went to a few dealers and the general consensus was to use premium fuel. If you want any questions answered, go to PTCrew.com - Learn it or Burn it. It has everything you would want to know about PT's.
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