Sonnax highlights signal accumulator piston kit for GM 6T40
Sonnax highlights its drop-in signal accumulator piston kit (part number 144740-40K) for signal accumulators in GM 6T40 (Gen. 2 & 3) transmissions. According to the company, this kit allows repair of the valve channel casting without reaming, and the O-ring provides a positive seal against critical pressure loss even in worn bores.
Diagnosing the infamous GM 8L45, 8L90 3-4 neutral
Today we are examining what we’ll call a “Twilight Zone” transmission complaint: an issue that appears out of nowhere while performing a small, insignificant repair and initially makes little sense. The 8L45 and 8L90 3-4 Neutral condition, which has been baffling many shops/techs, is one such complaint. Problem: 3-4 Shift is Neutral after installing a
Sonnax highlights oversized servo pin kit
Sonnax has introduced an oversized servo pin kit (part number 77787-03K) for reconditioned GM 4L60, 4L60-E, 4L65-E and 4L70-E case bores. According to the company, this chromoly steel servo pin matches the longest OE pin length and is fully compatible with OE and aftermarket servos.
Sonnax highlights accumulator valve train kit
Sonnax has introduced an accumulator valve train kit (part number 77754-10K). According to the company, it is built to prevent sleeve wear in GM 4L60-E series transmissions. The 4L60-E series valve train has three OE size variations: CX, DX and YZ. This kit is specifically designed for the DX size with additional selective springs to
Sonnax introduces Low/Reverse servo pistons for GM TH400, 4L80-E
Sonnax has introduced new Low/Reverse servo pistons for GM applications. According to the company, the new pistons are built for GM TH400 and 4L80-E transmissions, and are made of high-strength, billet aluminum to prevent failure.
Troubleshooting Ford 6F35 torque converter one-way clutch failure
It is Friday afternoon at Cooter’s Transmission, and the last of the day’s jobs are being wrapped up. Everyone is getting ready for spirits and good food at Buster’s Pub. A Ford 6F35 from a 2015 Ford Explorer rebuilt earlier in the week is installed, and something is not right. John, the installer, puts it
TD’s top ten products and tools of 2022
Transmission Digest readers voted during the past several weeks to select their favorite transmission products and tools for 2022 from among those nominated and published in the December issue. A note: there was a three-way tie in the voting for products, so 12 are listed; while only 9 tools were nominated. The winners are presented
Sonnax highlights heavy duty “E” clutch hub
Sonnax highlights the heavy duty “E” clutch hub (#35572-38T) for ZF8HP70 transmissions. This clutch hub is crafted from forged 4000-series aluminum, the same material used for high-performance engine pistons. According to Sonnax, the improved material significantly increases “E” clutch durability. Users can restore normal operation to ZF8HP70 transmissions after “E” clutch hub failure and avoid
Where to find wear on the Chrysler 948TE, ZF9HP48
Sonnax has provided the following guide on the critical wear areas and vacuum test locations found in the Chrysler 948TE and ZF9HP48 models. Technicians working on these models should find this guide helpful.
Sonnax introduces pinion yokes for 9-inch Ford differentials
Sonnax has introduced new pinion yokes for the 1330 and 1350 series U-joints on the Ford 9-in. rear axle. According to the company, the cradle of these pinion yokes won’t stress the joint and cause premature failure. Part numbers include: T9-28-1330FD (above) T9-28-1350FD
Sonnax introduces new nine-speed kits for ZF, Chrysler and Honda/Acura
Sonnax has introduced a new line of valve kits for nine-speed transmissions, including ZF9HP48, Chrysler 948TE and Honda/Acura nine-speed transmissions. According to the company, these kits feature hardcoat anodized aluminum valves that combat premature wear, and can restore proper pressure regulation, line pressure regulation and solenoid pressure regulation in nine-speed transmissions. Part numbers include: Shift
How reman valve bodies are evolving
For most of the past half century, the rebuilding of the valve body has been the skill set that separates master transmission builders from those with less experience. It follows that, much like a torque converter, purchasing a factory remanufactured valve body as a sub assembly has become more and more common. It’s not only
