Lastly, the EPC boost pressure relief valve system provided helps prevent runaway boost pressure to stop case and valve body wall blow-out due to excess pressure. The included highly improved wide land self-cleaning design boost valve and bushing resists wear so that pressure rise keeps working properly. Will shift to any gear, at any speed, by moving lever. Trans will start off in whatever gear shifter is in. These changes work in concert with a slight increase in line pressure to greatly improve the overall durability and shift feel of the transmission. Smooth, short shifts Converter charge pressure that matches engine torque to reduce TCC slip codes Better cooling/lubrication and converter feed/capacity using included optional internal upgrades Corrects/Prevents/Reduces: Codes: 628, P1740, P1744 Soft shifts, 2nd and 3rd burn up Converter burn up Reverse delay, no reverse hot Converter. 4L60E-3 Reprogramming Kit TM Full Race Stick Shift: Manual shift only. Features and benefits: This TransGo Reprogramming Kit is designed for all-out shift performance. The TransGo 4L80E SHIFT KIT® Valve Body Repair Kit includes valve body, case and pump components and modifications designed to deliver increased durability while providing short smooth shifts. This 700-2&3 Reprogramming Kit fits 1982 to 1993 General Motors vehicles equipped with the 700R4/4L60 automatic transmission. On the other hand, the runaway boost pressure problem results in costly broken case, direct drum and piston. With the low boost problem results in complaints of soft 2-3, direct clutch failure as well as the gear ratio and solenoid performance codes. The boost valve assembly in these transmissions are notorious for wear causing both low pressure as well as runaway boost pressure. This TransGo 4L80E SHIFT KIT® Valve Body Repair Kit fits 1991 to 2013 General Motors vehicles equipped with the 4L80E and 4L85E automatic transmission. Common complaints on the 4L80E and 4L85E automatic transmissions are soft 2-3 shifts, no upshifts, burnt direct clutch, broken hard parts (due to high pressure), and low pressure (due to solenoid filter breakup as well as gear ratio and solenoid performance codes).
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