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‘Green’ Bullets: Tips for Servicing Hybrid Vehicles

Newsflash: Hybrids are here to stay. The oldest Toyota Prius models are now 14 years old and many other hybrids from other manufacturers are crossing the 100,000-mile mark every day. Here are a few of my Silver Bullets, — or in this case “Green...

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Legendary Spark Plugs: The Six Toughest Vintage Spark Plug Replacements

1. AMC Pacer: The Pacer was supposed to get a GM Wankel rotary engine. If this were the case, the four plugs would have been easy to access. But thanks to emissions problems, the Pacer would get the regular AMC straight six. This forced the engineers...

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Battery Service and Diagnosis

A good battery with an adequate charge is absolutely essential for reliable cold starting. A weak battery, or one that is rundown, may not deliver enough amps to crank the engine when temperatures plunge and the oil thickens. Cold weather can be hard...

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Rotor Failure: Why Rotors Crack and Make Noise

The prices of rotors seem to be dropping the past few years. Call just about any parts supplier and they can quote you a vast range of prices for the same application. And when you compare the rotors side-by-side, they may look the same, but the difference...

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Wheel Bearings: Measurement and Torque

Wheel bearings are either of the ball or tapered roller variety. Front wheel bearing applications are an angular-type ball bearing, which will accept greater thrust loads than a Conrad-type bearing, and will accept a 100 percent load in the radial...

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Why Alignment Angles Change

An alignment angle doesn’t change randomly. There is a cause-and-effect relationship between external and ­internal forces that can alter the geometry of a vehicle’s suspension. Having the alignment reading for only one angle on one corner is just...

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Audi Engine Timing Chain Failure Due to Lack of Maintenance

If you’ve been working on cars as long as me, you’ll remember the first timing belt you did and thought, “what was wrong with timing chains?” It was only a year ago, when I was working on a 2005 Audi A6 Quattro with a 3.2L engine with a broken...

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Acura: Clunk Noise While Turning

Model: Acura RSX 2005-’06 Symptom: The front suspension makes a ­clunking noise while turning. Probable Cause: The front springs are moving on the spring seats. Corrective Action: Replace both front springs and do a four­-wheel alignment. Diagnosis:...

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Inside Import Car Collision Warning, Automatic Braking Systems

Anything that moves under its own power also has to stop, so brakes have been a safety feature on cars since day one. Over the years, technical innovations such as antilock brakes (ABS) have ­improved the ability to stop with minimal skidding on...

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Bendpak Breaks Ground On New Warehouse and Shipping Complex

BendPak, Inc. announced the recent groundbreaking to celebrate beginning construction of a 67,000 square-foot multipurpose warehouse and shipping center located on 3.7 acres of land in Santa Paula, CA. The new 67,000 square-foot facility will further...

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Pulling Codes: 7 Common Causes of Misfire Codes

A flashing check engine light and a P0301 to P0312 diagnostic trouble code (DTC) is a surefire indication that one or more cylinders are misfiring. Occasional misfires may pass unnoticed, but a steady misfire is hard to miss. The engine usually feels...

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Analyzing the Cylinder Pressure Waveform from a Running Engine, Part 3

By Vasyl Postolovskyi and Olle Gladso Contributing Writers and Instructors at Riverland Technical and Community College in Albert Lea, MN   In Part 1 of this Maximizing Tools series, we discussed an alternative approach to diagnosing an engine...

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Home x-old ACPN Tech Tip: Dodge Has A P2767 Code With Transmission In Limp In...

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Applies To:
2006 300 3.5L
2006-’07 300 5.7L
2006-’07 Charger 3.5L
2006-’08 Charger 5.7L
2009 Grand Cherokee 3.7L
2006 Magnum 5.7L

Customer Concern:
P2767 trouble code (Torque Conv Clutch Press Ctrl Solenoid Ctrl Circ Range/Perf) is setting. Transmission is in limp in mode.

Potential Causes:
Lead Frame or Transmission Wiring

Tests/Procedures:
1. Check the wiring between the transmission and the transmission control module. Make sure the #2 signal wire is not open, shorted to ground, or shorted to any other circuit.

2. If the wiring checks OK, raise all four wheels off the ground, start the vehicle and place the shifter in drive. While lab scope testing the #2 signal wire, obtain second gear. When the transmission is in second gear, there should be a 5-volt square wave pattern being produced by the #2 sensor. If not, replace the sensor.

Tech Tips:
The speed sensors are sold as a complete assembly, which may be called the “lead frame” or ­possibly the “electrohydraulic control unit.”

Courtesy of Identifix.

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‘Green’ Bullets: Tips for Servicing Hybrid Vehicles

Newsflash: Hybrids are here to stay. The oldest Toyota Prius models are now 14 years old and many other hybrids from other manufacturers are crossing the 100,000-mile mark every day. Here are a few...More

Legendary Spark Plugs: The Six Toughest Vintage Spark Plug Replacements

1. AMC Pacer: The Pacer was supposed to get a GM Wankel rotary engine. If this were the case, the four plugs would have been easy to access. But thanks to emissions problems, the Pacer would get the regular...More

Independent Rear Suspension Theory

Independent rear suspensions are becoming the norm on cars and SUVs of all sizes. The two main advantages of ­independent rear suspension are ride and handling. When you’re looking up at one of...More

SAE J2928: Rotor Standards

In 2012, an aftermarket rotor testing procedure was approved by the Society of Automotive Engineers (SAE) titled J2928 Brake Rotor Thermal Cracking Procedure for Vehicles Below 4,540 kg GVWR. The document...More

Audi Engine Timing Chain Failure Due to Lack of Maintenance

If you’ve been working on cars as long as me, you’ll remember the first timing belt you did and thought, “what was wrong with timing chains?” It was only a year ago, when I was working on a 2005...More

Acura: Clunk Noise While Turning

Model: Acura RSX 2005-’06 Symptom: The front suspension makes a ­clunking noise while turning. Probable Cause: The front springs are moving on the spring seats. Corrective Action: Replace both...More

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BendPak, Inc. announced the recent groundbreaking to celebrate beginning construction of a 67,000 square-foot multipurpose warehouse and shipping center located on 3.7 acres of land in Santa Paula,...More

Goodson Tools & Supplies Expands Tire Changing Product Line

Goodson Tools & Supplies for Engine Builders is expanding its line of replacement parts for tire changers. The backbone of the line is a wide assortment of mount/demount heads (aka duck heads)....More