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097 (4SPD FWD 1991-1998)
They are individually tested on a digital Sol-X for amperage and calibration
Front fits 4L80E 1991-98
***DOES NOT FIT VEHICLES WITH AIRBAG INDEPENDENT REAR SUSPENSION***
Sonnax 55209-01K 5L40E 5L50E A5S390R A5S360R Transmission Boost Valve Kit Featured Products 097 (4SPD FWD 1991-1998)Manufacturer Part Number: 55209 01K Brand: Sonnax Fitment Type: Direct Replacement Manufacturer Warranty: Yes 5L40 E, 5L50 E Boost Valve Kit Part No. 55209 01K Performance ratio with . 531" & . 492" dia. valve spools. Vehicles with GM 5L40 E and 5L50 E transmissions are prone to poor line rise or high Reverse pressure problems causing poor shift quality and clutch failure due to leakage at the boost valve assembly. Sonnax offers two boost valve kits:
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