Seller notes

Line Pressure Booster KitPart No. 4R70W-LB1Unique Forward & Reverse Boost Assembly Pressure Regulator Spring Line rise control in the AODE/4R70W is different than in most units. Forward pressure is controlled by EPC oil reacting directly on the spring end of the PR valve. The OE boost assembly only increases pressure in reverse. Traditional use of a larger ratio boost valve to increase line pressure has not been an option for this unit. Sonnax has created a specially designed boost assembly that...

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