Sonnax Archives - Transmission Digest
Sonnax highlights Chrysler RFE Sure Cure kits

Sonnax highlights its Sure Cure kits for replacing worn areas in Chrysler RFE series transmissions. Part numbers include: These kits cover Chrysler 45RFE, 545RFE, 65RFE, 66RFE and 68RFE transmissions.

Sonnax introduces three-bolt adapter flange yoke kit

Sonnax has introduced a new three-bolt adapter flange yoke kit (part no. T35-BMWF-01K) for BMW and Toyota GR Supra vehicles with 105mm bolt circle dia. companion flange. Sonnax says that this kit is aimed at replacing weak giubo and two-piece driveshafts with a one-piece, U-joint style driveline in these vehicles. The kit includes a spacer for .552-in. pilots.

Sonnax introduces splined stub and sleeve kit

Sonnax has introduced a one-piece carbon fiber splined stub and sleeve kit for overcoming driveshaft problems. Designed for 1350 series u-joints, this kit (part no. T35-28-350CFIK) bonds onto 3.5-in. I.D. carbon fiber tube. Sonnax says that it includes perfectly matched stub and sleeve components.

Sonnax highlights TH400 heavy and extreme duty input shafts 

Input shaft failure is a common problem in GM TH400 transmissions running with added horsepower. Sonnax notes that it offers heavy and extreme duty input shafts compatible with heavy duty forward drum part no. 34554-01 and Smart-Tech drum module no. 34555-01K. Part numbers include: • Heavy Duty Input Shaft 30280-01 • Heavy Duty Input Shaft 30280-02 • Extreme duty Input Shaft 35280-02 • Extreme Duty Input Shaft 27280-02

Diagnosing Ford 10R60, 10R80 and 10R140 series speed sensor issues

Ford 10-speed 10R series transmissions utilize four two-wire, Hall-effect sensors — TSS, ISSA2, ISSAB and OSS — for providing speed signals to PCM or TCM. They are supplied nine volts by a PCM or TCM and assist in the control of clutch apply/release timing that is used in determining shift quality, including TCC. Here are

Sonnax introduces TCC signal damper piston kit for Ford, GM 10-speeds

Sonnax has introduced a new TCC signal damper piston kit for GM and Ford 10-speed transmissions. Sonnax says this kit can correct the operation of the converter in GM 10L80/90 (Gen. 1) and Ford 10R60/80 transmissions. According to Sonnax, this kit allows long-lasting and quick repair of the lower valve body casting without reaming, and

Easy TH400, 4L80-E reverse servo setup: Craft your own tool

While not as sensitive as some shifting bands, the Reverse band adjustment on a TH400 or 4L80-E transmission is critical, and failure to get it right has tripped up even the best builders. There is nothing worse than getting the transmission installed, putting it in Reverse and then not going anywhere or having no engine

Sonnax introduces 10L/10R LPC signal damper piston kits

Sonnax has introduced a new line of LPC signal damper piston kits for Ford and GM 10-speed transmissions. Sonnax says these kits can correct EPC circuit pressure variation for these transmissions by replacing the worn OE damper and installing the appropriate kit. The kits install without the need of reaming the valve body.

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Sonnax introduces new piston for ZF, Ford six-speed transmissions

Sonnax highlights its new high-strength billet aluminum piston (part no. 95984-01), which is designed to provide additional strength in ZF 6HP26 and Ford 6R60/75/80 transmissions. According to Sonnax, die-cast ZF 6HP26 and Ford 6R60/75/80 pistons commonly crack at the outer diameter of the apply area due to manufacturing defects and/or high stress areas, which is

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Understanding lube flow control valves in Toyota/Lexus UA/UB80 transmissions

The Toyota/Lexus UA80 and UB80 transmissions first came out in 2017 in Highlanders and Siennas. The UA80 is used in V6 applications, and the UB80 is paired with four-cylinder versions. They have been called Toyota New Global Architecture type transmissions, and alternately referred to as the “Direct Shift 8AT” eight-speed automatic transmission. This transmission was

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Sonnax highlights GM 4L heavy-duty output shafts

Sonnax highlights its line of heavy-duty output shafts for GM 4L transmissions. The company touts the torsional design that allows energy to be absorbed, reducing peak loads to critical areas. Transmissions these shafts fit include the 4L60-E, 4L65-E and 4L70-E lines. Sonnax offers part no. 74678L-HD for 2WD and Corvette applications; and part no. 74678S-HD

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Toyota/Lexus UA/UB series: Critical wear areas and vacuum test locations

Sonnax has provided the following guide on critical wear areas and vacuum test locations for the Toyota/Lexus UA and UB lines of transmissions. Technicians working on these models should find this guide helpful. Read more stories from our TASC Force Tips series here.

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