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  • ‘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.
  • Computer Reprogramming
    Friday, December 9, 2016 10:24 AM

    There is more than one way to skin a computer

    There was a time, long ago, when the owner of a vehicle would experience a transmission problem and roll into a repair facility to have it addressed.

  • Technically Speaking: Acura MDX with a Mind of its Own
    Tuesday, November 8, 2016 10:52 AM
    Little did the owner of a 2005 Acura MDX know that at the time the transmission in his vehicle was being repaired that it was the start of a long uphill battle. The vehicle initially was towed into a shop for inspection due to a no-movement condition.
  • Technically Speaking: 2004 Subaru Forester
    Tuesday, October 18, 2016 2:54 PM
    Mike Riley investigates a 2004 Subaru Forrester that jerked while accelerating on a right turn.
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