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  • R&R Tech: Expect the Unexpected
    Thursday, August 1, 2019 12:00 AM

    Here in the Midwest the dog days of summer are here, creating a hot, humid environment and the intermittent issues that seem to come with it. You know…the types of concerns in which you have to drive the vehicle for an extended road test, and by the time you see what the issue is and get back to the shop, the heat from the engine compartment or under the vehicle is almost unbearable and you can’t touch anything without heat resistant gloves on. Good times.

  • R & R Tech: Picking Up Bad Vibrations
    Monday, July 1, 2019 12:00 AM

    Quite a lot has been written and many technical classes have been put on regarding the General Motors 8L45/8L90 family of transmissions. We are now seeing opportunities to put that information to use. The vehicles equipped with these transmissions are beginning to trickle into our shops as they are beginning to fall out of factory warranty. Many GM vehicles utilize these transmissions from 2015 to present.

  • R&R Tech: Shaking Loose
    Friday, May 31, 2019 12:00 AM
    Chris Adams attempts to save a 2015 Ram Promaster after the left transmission mount bracket and transmission case are broken.
  • R & R Tech: Spiking Speedometer
    Wednesday, May 1, 2019 12:00 AM
    A customer showed up at our shop with a 2008 Chevrolet Impala SS that was equipped with the 5.3 LS engine and a 4T65E transmission. The customer had a complaint of an erratic speedometer while driving. I began by collecting all the vehicle information for a check out sheet, such as VIN, mileage, engine and transmission type. After filling out the vehicle information section I set about to begin my diagnosis. First I checked codes and found the vehicle had no transmission or engine codes, but it did have a RF wheel speed sensor code, which did not seem likely to cause the problem, but I kept this in mind anyway. I was suspecting a possible output speed sensor issue or maybe even an instrument cluster issue.
  • R & R Tech: Transmission With a Mind of its Own
    Monday, April 1, 2019 12:00 AM
    A customer had brought in her 2010 Ford Escape equipped with a 3.0L engine and the 6F35 transaxle. The customers concern with the vehicle was that the transmission slipped intermittently. We started our evaluation with a quick visual inspection of the vehicle and checking fluids, all of which checked out good. Then I scanned the car with the scan tool; all of our locations have Snap-On Zeus workstations and I had two codes: a P0297, “Vehicle Over Speed Condition,” and a P1500, “Vehicle Speed Sensor.” No codes in any other modules. The next step was to go for a test drive and see if I could duplicate the complaint.
  • Two Unique Situations, Two Happy Customers
    Friday, March 1, 2019 12:00 AM
    Carman Klaber explains how two troubled vehicles were fixed and led to happy customers.
  • PT Cruiser Trouble Code Fixed with New Part
    Friday, February 1, 2019 12:00 AM
    A customer brought her 2006 Chrysler PT Cruiser to our shop with a complaint of random high engine revs. She stated that restarting the engine resets the vehicle and it works again temporarily, and this had been going on for about four months. The vehicle had a 2.4-liter turbocharged engine with a 604 transmission.
  • Don’t Assume; Be Systematic with Diagnosis
    Wednesday, January 2, 2019 4:06 PM
    Like many of you, this time of year I am usually asked to assemble a variety of items and gifts for my family members. In light of these requests, I have spent a significant amount of time analyzing why we waste so much time assembling, disassembling and re-assembling items out of an unwillingness to simply read the instructions. Often this process results in leftover spare parts and frustration.
  • R&R Tech: The Jeep Patriot with a really bad rolling surge
    Saturday, December 1, 2018 12:00 AM
    Sometimes despite your best efforts you can still manage to shoot yourself in the foot. The following account is a prime example: While this happened on one specific vehicle, it could happen on any number of vehicles where the cause is the same, but could have different end results.
    One of our shop locations had a 2011 Jeep Patriot that came in on the back of a tow truck. The customer stated that it started making noise and then quit moving. This one was an easy checkout; the vehicle didn’t move in any direction, had metallic-looking fluid, a horrendous bearing noise, and had a P0777 (secondary pressure control solenoid stuck on) code stored. Even though this one was pretty much a slam dunk in the way of diagnosis, we still needed to go through our complete evaluation procedure.
  • RR Tech: What is that Unpleasant Grinding Noise?
    Thursday, November 1, 2018 12:00 AM
    John Griffin confronts a 5R55E unit with oil-pan bolts wiggling such that the pan is shifted past the mating surface of the block.
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Beyond the missions of providing education and reference materials, Transmission Digest serves as a prime resource used as shops find the parts, supplies and services necessary for successful and profitable operation. Nine of the 12 issues published each year are focused on the products, services and suppliers relating to a specific profit center within the retail shop.

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