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  • Locate a Supplier
    Friday, March 1, 2019 12:00 AM
    Click Here  to locate a parts or unit supplier. Contains 39 categories of Powertrain Industry goods and services and the companies that provide them.
  • Just When I Thought I’ve Seen Everything
    Monday, April 2, 2018 2:18 PM
    OK, let me see if I’ve got this right. The Mercedes 7G-DCT 7-speed dual clutch transmission (Figure 1) does not have a reverse idler gear. When shifted to reverse it uses 2nd gear, 3rd gear and 1st along with all four shafts. That’s correct, now let me explain how and why. This compact dual-clutch transmission was designed in 2012 to replace the 722.8 CVT transmission found in the later B Class 246 models...
  • Extra Set of Eyes Saves the Day
    Friday, March 2, 2018 1:43 PM
    In addition to the OEM-spec remanufactured transmissions we build, we also offer a series of heavy-duty transmissions available in three different stages. This article examines the installation of our Road Ripper™ 3000 (stage 3 unit) in a 2005 Dodge 2500 pickup equipped with a 5.9L diesel and a 618/48RE transmission.
  • ‘Rebuilt’ salvage-yard transmission, hmmm …
    Wednesday, January 3, 2018 3:45 PM
    We had a local general repair shop bring us a 2014 Jeep Grand Cherokee 3.6L V-6 engine equipped with a ZF 8-speed (845RE) transmission; they had just installed a “rebuilt” transmission that was sourced from a salvage yard. The customer’s stated concern was, “The place that built the transmission just said it needed to be programmed.” Needless to say, we knew that this was going to be an adventure.
  • Understand Systems Involved in Diagnosis
    Wednesday, September 6, 2017 9:47 AM
    A while back we had a customer come into our shop stating, “The vehicle sometimes has a VSC (Vehicle Stability Control) error and won’t go past fourth gear, but today it seems fine.” The vehicle was a 2007 Lexus LS460 with 132,561 miles, and equipped with an AA80E 8-speed transmission and a 4.6L engine. As with routine diagnosis, I started with a road test, a scan of all modules, and an undercar inspection.
  • Are We Speaking the Same Language?
    Monday, August 7, 2017 10:52 AM
    May I have a word with you, please?
    If you are repairing transmissions for a living, you will invariably spend some time on the phone ordering parts and speaking with technical hotlines to assist in your diagnosis of problems. Having been on both ends of a tech line for over half a century and an equal amount of time buying parts, I have learned a whole new language...
  • Electronics In Dual Clutch Units
    Monday, July 10, 2017 9:33 AM
    This article is the final segment of our exploration of the dual-clutch transmission, or direct shift gear box (VW and Audi) or DualTronic in BorgWarner’s brand. We have included several schematics from a VW Touran model, as VW has the largest amount of these transmissions in use.
  • Hydraulic & Fluid Controls in Dual-Clutch Units
    Wednesday, June 7, 2017 3:00 PM
    To recap, we have looked at how the dual-clutch transmission functions, essentially two gear boxes in one with the input shafts driven by hydraulically applied clutch packs that drive three concentric shafts that are one inside the other.
  • Mercedes 722.6: No Upshift Condition
    Wednesday, May 3, 2017 1:53 PM

    Technically Speaking:

    The frustrated owner of a 1996 Mercedes S500 called to complain that his vehicle had been acting up for some time and he was at his wits end. Apparently, he and others had taken a swipe at repairing the problem with little success so the vehicle was towed into the shop to get a look with a fresh pair of eyes, so to speak.

  • Ford TorqShift 6 Component Upgrades
    Wednesday, March 8, 2017 3:50 PM
    The transmission workhorse of the Ford family was developed internally to rival other manufacturer’s heavy-duty gearboxes such as the Allison 1000.
    Unlike the 6R60 / 6R80 models that were a carryover from the ZF6HP26, Ford started with a clean sheet of paper in the development of the 6R140. To say that this unit is a beast would be an understatement due to the fact that it weighs more than 300 pounds.
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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