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  • 4T45E Pump Failure
    Wednesday, November 13, 2019 4:01 PM
    Most of us are all too familiar with the effects pumps can have on a transmission when they fail. No move, delayed engagements, clutches and/or bands incinerated and more. It is interesting to note the type of pump a transmission is using, and the advantages and dis-advantages associated with that style of pump. Take for example a gear and crescent style pump. This is otherwise known as an internal gear, positive displacement pump. It has been the primary fluid mover for years in automatic transmissions having three basic stages, it fills (sucks), transfers and delivers.
  • Wednesday, May 1, 2019 12:00 AM
    Jon at Wilson Transmissions received a 2010 Venza with a 3.5L/U660E combo from a used car lot. All seemed to be working good other than many dash indicators lit up. After scanning the vehicle and finding pressure switch codes (P0872 for TFP Sensor/Switch C and P0877 for TFP Sensor/Switch D), Jon ordered a TFP switch/TFT sensor assembly from the Toyota dealer.
  • Shift Pointers: Another Heart Break
    Friday, March 1, 2019 12:00 AM
    A 2014 Nissan Versa arrives at a shop on a flatbed with a customer complaint of a loss of engine power. The reason it was brought to a transmission shop is the type of engine power loss it had. In park or neutral, the engine can rev up to 2500 rpm easily. Even in drive with the brakes applied, you can reach stall speed torque with no power loss issues at all. But, the moment the brake is released to launch forward, as soon as it starts to roll there is an immediate loss of engine power.
  • Friday, February 1, 2019 12:00 AM
    In the December 2018 Technically Speaking® column, some examples of different internal transmission parts that break and the problems they can cause were discussed. This month’s article comes to you as a warning of what you can break if you are not careful. Some may have already dealt with this unpleasant experience that I guarantee was accompanied with quite a few superlatives.
  • Saturday, December 1, 2018 12:00 AM
    One very significant change that took place in our industry occurred when manufacturers chose to place the TCM inside the transmission. By minimizing the amount of wires going to the transmission, it saved them a considerable amount of money. However, for us in the repair and rebuild industry, this can be frustrating from both a diagnostic and cost standpoint, especially when the solenoids are integral to the TCM. And/or when programming is essential to complete the repair correctly and efficiently.
  • Thursday, November 1, 2018 12:00 AM
    After coarse adjustment, vehicle must be driven before making fine adjustments.

  • Shift Pointers: No Shim and a Short
    Saturday, September 1, 2018 12:00 AM
    Lorenzo Ortiz from Phillips Transmission had a 2005 Acura TSX with the MCTA five-speed transmission come into his shop for repairs. After it was repaired and installed into the vehicle, it had a new problem. The car would not start. The immobilizer lamp was flashing and the scan tool could not communicate with the engine control module, yet all other modules would communicate.
  • Wednesday, August 1, 2018 12:00 AM
    It’s always unsettling when a transmission comes back after the customer has had it for only an hour; especially when it came back on a hook. Such was the case at a local transmission shop with a 42RE transmission.
  • Friday, June 1, 2018 12:00 AM
    A 2008 Honda Accord using the B97A transmission behind a 3.5L engine was brought to Newmarket Transmissions from a general repair shop to be rebuilt. They had changed the radiator and when topping off fluids, they noticed the “strawberry milkshake” condition of the transmission fluid. The radiator was also contaminated with the milkshake condition.
  • Shift Pointers: Doesn’t that Suck!
    Monday, February 13, 2017 1:25 PM
    I came to know Mario Aristides, a veteran of the transmission industry, when I began working with ATSG in 1990. A good friend of Robert Cherrnay, he had specialized in European transmissions. He provided technical assistance to ATSG with his knowledge regarding transmissions found in Mercedes vehicles throughout the ’90s and into the following decade. Well into his 70s, he is still very much active in the industry with European vehicles. Every now and again we get a call from him where he informs us of a problem he has encountered with his famous line, “You must make an issue with this!” And such is the reason for this article.
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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