Sonnax Archives - Page 7 of 14 - Transmission Digest
TCRA names new officers and board

The Torque Converter Rebuilders Association (TCRA) recently named its new board and officers. The positions were chosen during the organization’s annual meeting June 24 and 25. Note that not all of these positions are newly elected, as some members return from last year. Here is the full list: President: Mike Cargill (Schaeffler) Vice President: Eric

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Biggest takeaways from the TCRA annual seminar

June 24 and 25 brought us the annual Torque Converter Rebuilders Association (TCRA) seminar, in which the organization meets to talk technical issues, vote on its board, and hold seminars. More coverage of this event is forthcoming in TD’s July issue, but in the meantime, here are some of the biggest takeaways from seminar day.

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Sonnax highlights oversized secondary PR valve kits for Aisin Seiki transmissions

Sonnax highlights its oversized secondary pressure regulator valve kits for Aisin Seiki AS66RC and AS69RC transmissions. The company says reconditioning the bore and installing these kits can help users restore proper hydraulic integrity of the SLT circuit in these transmission models. These kits include a hardcoat anodized aluminum valve that the company says combats premature

Ford 6R140: Repairing the elusive intermittent neutral condition

The 6R140 has been in large Ford trucks since 2011 and is now considered a common unit in most shops. Our discussion today concerns the elusive intermittent neutral condition. At one particular time, this complaint was so common at one particular California utility company with a fleet of trucks that there seemed to be no

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Sonnax highlights oversized overdrive servo regulator valve kit

Sonnax highlights its oversized servo regulator valve kit (part no. 76948-59K) for Ford 4R70E/W and 4R75E/W transmissions. Sonnax says the kit can help users maintain critical tolerances that re-establish the hydraulic integrity of the overdrive servo circuit. This kit features a hardcoat anodized aluminum valve that the company says combats premature wear and maintains proper

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TCRA announces Sonnax credit for members

The Torque Converter Rebuilders Association (TCRA) announced that Rebuilder Members in good standing will each receive a $200 credit from Sonnax. The credit can be used towards their existing Sonnax account or towards future purchase. “I was pleasantly surprised when Sonnax offered this direct award to our Rebuilder Members,” said Mike Cargill, president of TCRA.

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Sonnax highlights solenoid test manifold kit

Sonnax highlights its solenoid test manifold kit (part no. 35430-VTK), which allows users to verify solenoid internal sealing integrity in ZF8HP45/55/70 and Chrysler 845RE transmissions. According to Sonnax, the leading cause of solenoid failure in these units is an inability to maintain an internal mechanical seal, resulting in a multitude of drivability concerns. This kit

Sonnax highlights TCC accumulator valve kit

Sonnax highlights its TCC accumulator valve kit (part no. 44912-18K), which the company says can eliminate leaks to restore normal operation in Chrysler 45/545/65/66/68RFE transmissions. An O-ring is incorporated in this kit for positive sealing, including in worn bores. Annular grooves help center the accumulator valve in the bore to reduce future side-load wear, the

Sonnax highlights remanufactured EPC solenoid

Sonnax highlights its remanufactured EPC solenoid #36940E-RRP, which the company says is built to replace failed Ford 5R110W EPC solenoids. Sonnax says its remanufactured solenoids are disassembled, cleaned and tested to meet OE specifications. Sonnax #36940E-RRP includes a new sleeve/valve assembly and plastic end cap; however, an OE core must be supplied.

Sonnax highlights adjustable rear servo pin kit

Sonnax highlights its adjustable rear servo pin kit (part number 34912-01K), which allows users to replace servo pins in GM TH400 and 1995 and earlier 4L80-E transmissions. OE pins have seven different lengths to allow for adjustment of the Low/Reverse band but are no longer available from GM. This pin kit has an adjustment range

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.

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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