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Sonnax Accumulator Valve Train Kit - 77777M-K
Sonnax Accumulator Valve Train Kit - 77777M-K
4L60E 700R4

Kit Includeds:
•  Valve:
•  Springs (3) Selective:
•  Sleeve:
•  Plug:

Heavy Vehicles
Vehicles with a GM 200-4R, 700-R4, or 4L60-E transmission can experience 1-2 light throttle abrupt or bang shifts, especially when using the 093 Corvette or 553 2nd apply servo pistons. The traditional solution is to make the servo piston apply diameter smaller, however this limits the 2-4 band life. This shift problem can occur due to sleeve wear allowing torque signal and/or accumulator pressure leakage, or when the accumulator valve is too large for the application, resulting in too much pressure on the 2-4 band.

This valve train has multiple OE size variations, including B, A, N, M, L, K, and F. The size variations are clearly stamped with the letter on the aluminum sleeve. Most vehicles, depending upon the transmission/engine combination, can use either the M, L, or K version. However, these are not available unless scavenged from other valve bodies. Sonnax offers two replacement accumulator valve train kits: 77777M-K for the M (.341" valve diameter) and 77777L-K for the L (.330" valve diameter).
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Our Price:
Sonnax Accumulator Valve Train Kit - 77777M-K
Accumulator Valve Train
Assembly Heavy Vehicles

Sonnax Accumulator Valve Train Kit Heavy Vehicles - 77777M-K

Size and Weight:
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Sonnax Parts
406 East Park Ave
Enterprise, Alabama 36330