Sonnax highlights pressure switch rebuild kit and installation tool kit
Sonnax streamlined its pressure switch rebuild and installation tool kit offerings for GM 6L45/50/80/90, 6T70 (Gen. 1) and 6T75 (Gen. 1) transmissions. Sonnax pressure switch rebuild kit #124740-70K includes enough discs and seals to rebuild 10 TEHCM units and replaces #124740-30K. The related Sonnax installation tool kit #124740-TL70 includes tools only and replaces #124740-TL30. Restore
Sonnax highlights pump slide pivot pin and spring kit
Sonnax highlights its pump slide pivot pin and spring kit (#104553-03K), which the company says can prevent leaks and fluctuating line pressure in GM 6L45/50/80/90 transmissions by replacing the pump slide pivot pin. The pump slide pivot pin and the associated spring in these units are prone to wear, yet not available separately from the
Ford 6F35 (Gen. 1 & 2) Case Saver Kit
Instead of sourcing an expensive new case, you can now stop further wear and restore endplay to proper levels with this new Sonnax case saver kit (p/n 144281-01K). Ford Gen. 1 and 2 6F35 transmissions are notorious for worn axle bushings, which allow external leakage. This premature bushing wear can be caused by a worn
New GM 8L45, 8L90 Zip Kits
Sonnax has introduced two Zip Kits that target the root cause of multiple shift-related complaints and converter-related complaints, respectively, by sealing the critical circuit pressure losses in the GM 8L45 and 8L90 valve body. Kit #8L45-8L90-SHIFT-ZIP helps prevent pressure loss within the signal accumulator, clutch control and 1-3-5-6-7 accumulator piston circuits. Kit #8L45-8L90-TCC-ZIP helps prevent
Heavy Duty “A” Clutch Backing Plate
Prevent flexing of the clutch pack in ZF8HP70 and ZF8HP75 transmissions when the clutch is applied by upgrading from the OE backing plate to the Sonnax heavy-duty backing plate (p/n 35577-70), eliminating the leading cause of “A” clutch failure. This easy-to-install plate is twice as thick as the OE for significantly improved protection against burnup.
Sonnax and Rostra Powertrain Controls Join Workforces
Both the Sonnax and Rostra brands have been part of Marmon Holdings, Inc. since 2018.
GM 8L45, 8L90 Oversized Converter Feed Limit Valve Kit & Tool Kit
Bore wear or a stuck converter feed limit valve in GM 8L45/90 transmissions can result in converter overheat, incorrect TCC apply or release, inadequate lube and cooling, and converter over-pressurization. Reaming the bore and installing this new Sonnax kit will recover hydraulic control, renew TCC and lube performance and protect against premature wear for lasting
GM 6L80, 6L90 Output Planetary Lube Dam
Avoid failures and comebacks by cleaning the lube passages and installing the new Sonnax output planetary lube dam (p/n 104584LP). The output planetary assembly in GM 6L80/90 transmissions has a lube dam, or cover, that directs lube oil flow to the planetary lube feed passages. Over time, sludge buildup can occur, which chokes off lubrication
GM 4L80/85-E Extreme Duty Input Shaft
Input shaft failure is common in performance GM 4L80-E and 4L85-E units running with extreme horsepower. OE and aftermarket shafts simply don’t hold up in these conditions, leading to spline twist and shaft breakage. Recommended for applications above 1,000-hp, the Sonnax extreme duty input shaft (p/n 34670-02) is manufactured from high-strength Aermet steel alloy with
GM 8L45/90 Converter Feed Limit Valve Kit
Bore wear or a stuck converter feed limit valve in GM 8L45 and 8L90 units can result in converter overheat, incorrect TCC apply or release, inadequate lube and cooling and converter over-pressurization. This new drop-in Zip Valve kit from Sonnax (p/n 154740-19K) recovers hydraulic control for proper performance and protects against premature wear for lasting results.
Aisin Seiki AS66RC, AS69RC Oversized SLT Piston Kit
Significant bore wear at the SLT accumulator bore is common in Aisin Seiki AS66RC and AS69RC transmissions, resulting in unstable line pressure, low pressure, and multiple shift issues. Reaming the bore and installing Sonnax oversized SLT accumulator piston kit (p/n 122740-17K) will restore proper clearances and hydraulic function.
GM 8L45/90 Pressure Regulator & Shuttle Valve Kits
Wear at the pressure regulator casting bore and/or shuttle valve sleeve in GM 8L45/90 transmissions can cause multiple issues including high line pressure, harsh shifts, low cooler flow, loss of lube oil and overheating.
