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.
GM 4L80/85-E 2-3 Accumulator Spring
This new Sonnax 2-3 accumulator spring (p/n 34931-01) for GM 4L80/85-E units is a direct replacement spring that has been stress relieved and shot-peened for increased durability compared to factory springs.
GM 4L60, 4L60/65/70-E Extra Wide Intermediate Band
Ideal for 4×4, heavy-duty and commercial use in GM 4L60 and 4L60/65/70-E units, Sonnax drop-in extra-wide intermediate band (p/n 77700-01K) is the ONLY wide band available that features OEM style high-energy material, according to the company. It’s 15% wider than the OE band, provides 15% more holding capacity, and features a 60% thicker case anchor
GM 400, 4L80-E Case Saver Retainers
Protect case lugs from blowout with the only intermediate clutch retaining ring case saver that allows the intermediate band to be retained. Only the Sonnax case saver retainers support the intermediate clutch retaining ring, yet are thin enough to allow the intermediate band to be installed, allowing case lug protection in all applications. · Fits
GM 8L45/90 1-3-5-6-7 Accumulator Piston Kit
Sonnax has introduced a new drop-in Zip Valve kit. The 1-3-5-6-7 accumulator piston kit (p/n 154740-15K) eliminates leaks in GM 8L45/90 units. This kit restores normal shift operation and feel while protecting against premature wear for lasting results.
TASC Force Tips: Diagnosing 8L45 & 8L90 Shift Complaints
Sometimes attention to the smallest of items can save you big dollars.
GM 8L45, 8L90 Signal Accumulator Piston Kit
Sonnax has a new drop-in Zip Valve product: signal accumulator piston kit (p/n 154740-06K). Including four piston sets that fit any of seven locations in GM 8L45 and 8L90 units, this kit allows bores to be reconditioned quickly and easily with no reaming required. The hydraulic integrity of the VFS signal pressure circuits are re-set.
GM 8L45, 8L90 O-Ringed End Plug Kit
Sonnax introduces a new drop-in Zip Valve product: an O-ringed end plug kit (p/n 154740-17K). This easy-to-install kit puts an end to leaks, restores hydraulic integrity, and renews shift operation in GM 8L45 and 8L90 transmissions.
GM 8L45, 8L90 O-Ringed End Plug Kit
Sonnax has introduced a new drop-in Zip Valve product: O-ringed end plug kit (p/n 154740-17K). This easy-to-install kit puts an end to leaks, restores hydraulic integrity and renews shift operation in GM 8L45 and 8L90 transmissions.
Transmission Testing & Repairs: Make Sure You’re Vacuum Testing
Vacuum testing has become a trusted method for identifying valve body problems and verifying repairs.
GM 4L80/85-E 2-3 Accumulator Spring
This new Sonnax 2-3 accumulator spring (p/n 34931-01) for GM 4L80/85-E units is a direct replacement spring that has been stress relieved and shot-peened for increased durability compared to factory springs.
GM 4L60/65/70-E AX Code Accumulator Valve Sleeve
Recover hydraulic control and renew shift operation in GM 4L60/65/70-E transmissions with the new Sonnax drop-in AX code accumulator valve sleeve (p/n 77754-61). Features include: direct replacement sleeve replaces OE sleeves with “AX” code only; renews accumulator action and quells leaks; and the drop-in Zip Valve installs quickly and easily.
