Automotive Transmission Repair Archives - Page 2 of 35 - Transmission Digest
Transmission Tech: Filtration

Mike Riley describes how the transmission filter can aid in diagnostics.

TDTG 040820 Filtration
Transmission Tech: Mazda FW6AEL SkyActiv

An exploration of the one way clutch in Mazda SkyActiv FW6AEL.

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Transmission Tech: Pump Assembly Design

Pumps are important to any automatic transmission, and Mike Riley can give you the details.

Transend Garage 031220 Pumps
Transmission Tech: 6T40 Rotating Clutch Drum

Mike Riley takes some of the conundrum out of the 6T40 rotating clutch drum.

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Exploring Some of the Mystery in the MP3023 Transfer Case

Introduced in 2011 in the Jeep Grand Cherokee WK2 series and Dodge Durango vehicles and continuing into 2019, there are a lot of these units on the roads. Magna Powertrain designed and produced the 3023 and 3010 transfer cases. The 3010 series is a single speed active transfer case (no low range) called Quadra-Trac Active on Demand, which is standard on the SRT8 models. The 3023 is a two-speed active transfer case electronically controlled by computer that requires no intervention on the driver’s part. There is a low range mode for rock crawling and other off-road activities and should never be used on dry pavement. All of these transfer cases require that all four tires be of equal tire size and pressure. Mismatched tires will quickly damage the transfer case, set codes, and create a diagnostic nightmare. Before working on any of the vehicles measure your tire sizes and pressures. They must be within 1/4” to operate correctly.

Tasc Force Tips: Critical Wear Areas & Vacuum Test Locations

Critical Wear Areas & Vacuum Test Locations

2012 KIA Optima 2.4 Hybrid

Not often do we get the opportunity to work with a tech that is having issues with a transmission in a hybrid vehicle. Not too long ago, Gerald Campbell had the chance to do just that with Carlos Costa from Transmission Technology. He had a 2012 Kia Optima 2.4L Hybrid using an A6MF2H transmission. There is no torque converter in this transmission. It does have an “engine clutch” and an “electrical motor” that sits in the area where the torque converter would be (Figure 1). The vehicle came into the shop with a “Stall on Engagement” complaint with repeated “Engine Clutch” burn out. In fact, when the trans was removed and disassembled, the engine clutch was smoked, and the clutch plates frozen/welded together.

Wiggle the Wires

Acouple of months ago we had a customer come into our location with a 2006 Kia Spectra equipped with the 2.0L engine and an A4CF2 transmission. The customer’s concern was that the vehicle would not shift at times. I started the evaluation by checking all the fluids, doing a visual inspection, and conducting a battery and charging system test with the Midtronics analyzer, and everything checked out good. I then moved on to connecting the scan tool to the vehicle and checking all modules for DTCs; the only one that came back was a P0748 (linear solenoid) electrical problem. There was no freeze frame data stored; it probably wouldn’t have helped me with this issue, but I wanted to see if it would at least show the speed or temperature at which the code set. From the customer’s description it sounded like an intermittent issue.

That’s a New One

R&R Tech
Dana Deeke reviews a Trailblazer with a leaky transmission.

October 2019 Issue

In This Issue
Volkswagen/Audi 09G: Flared Shifts
722.6, 722.9, NAG1: B2 Clutch Assembly
Nissan Frontier RE5R05A: No Start

The Rules of Selling in the Automotive Trades – Part 3

It’s Your Business
Terry Greenhut explains overcoming price objection.

Shop Profile: American Transmissions LLC

All-American Business, Small-Town Values
Springfield, Mo., business American Transmissions LLC operates under the premise that the customer should get what they pay for.