Shift Pointers: Reassembling GM pumps with cam failure
For the past several years, GM has used a binary positive displacement vane type pump. The compact design allows for it to be utilized in off-axis applications such as the 8L90 transmission and the third generation 6T40 transmission. Figures 1 (above) through 4 display a view of this style pump in the 6T40 applications. The
Are you ready to rock in 2023?
It can be tough to articulate exactly what defines a RockStar. Is it Mick Jagger’s swagger? Eddie Vedder joyously stagediving into a crowd? Eminem’s clever lyrical prowess or Beyonce’s ability to inspire viral TikTok dances? Elvis’ upturned lip? Is it Slash’s iconic top hat and leather jacket? Dave Grohl’s infectious anthems? Perhaps the essence of
The Nightmare on Oak Street: A hunt for 4L30E electrical problems
This story begins with a 4WD 1998 Honda Passport equipped with a 3.2 V6 engine and 4L30E transmission. The shift indicator in the cluster was not functioning correctly and transmission was shifting hard. The shift indicator showed ‘P’ in Park, and ‘1’ in D3, D2, or D1. The indicator didn’t light up in any other
How to fix GM 8L45/8L90 no-move and no-pressure conditions
By now you may have heard of, or even experienced, a GM 8L45 or 8L90 transmission with a no-move or no-pressure condition. Conditions of no movement or no pressure after repair have plagued this unit since its inception. Here’s what you can do about them. Condition 1: No movement after fast learn or programming If
Searching for the source of an unexpected transmission fluid leak
As the installer was pumping fluid into the transmission from the right side of the vehicle, he was having a difficult time getting it full.
Going the extra mile: Price’s Garage builds on a family legacy
Joshua Price grew up in the transmission industry — so much so that he used to take copies of this very magazine to school with him. “I’ve been in this business my whole life,” he says. “My dad had a transmission shop; he was in business from 1967 to 2008.” Bob Price’s shop was called
Vote for the Top 10 Powertrain Products of 2023
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Transmission stories to be thankful for
Transmission repair is all about solutions. Problems present themselves; repair professionals solve them. That’s why this Thanksgiving, we’re thankful for solutions. Here at TD, we pride ourselves on playing a role in getting transmission professionals the assistance they need, whether that’s technical info or just telling stories of industry successes. Here are five transmission stories,
Road to AAPEX: Can a 33-year-old Cadillac make it across the country?
You may notice a different type of show car at the Automotive Aftermarket Products Expo (AAPEX) this year. It only has 140 HP, with a four-speed automatic transmission, and clocks in at 20 feet long. This car is not arriving at the show on a trailer. Instead, it’s coming from Akron, Ohio, on its own power. The
Se habla Español!
I had an interesting phone call this month, one that reminded me that while transmission builders are the automotive equivalent of brain surgeons, they aren’t necessarily possessed with the skills of clairvoyance or telepathy. The caller wanted to know if there was a Spanish language version of the articles in Transmission Digest. While the magazine
The impact of oversized tires on transmission failures
Installing bigger tires on trucks is about as American as baseball, country music and apple pie. Unfortunately, big tires can also go hand-in-hand with something less enjoyable: transmission failure. You can guard against problems and better troubleshoot chronic failures by knowing the unintended consequences of oversized tires on the transmission, especially the role gear ratios
A wealth of information: Recapping the TCRA Annual Seminar
The profitable and proper remanufacturing of torque converters served as the focus for the 24th annual seminars and meetings of the Torque Converter Rebuilders Association (TCRA). The two-day event was held in the Detroit area in June and drew approximately 100 participants. As has been the case since the first of these converter segment get-togethers,
