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

Sonnax Accumulator Valve Train Kit 4L60E 700R4 77777M-K
Sonnax Accumulator Valve Train Kit 4L60E 700R4 77777M-K
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Product Information For Sonnax Parts

Product Description For Part No. 77777M-K

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).
  • Heavy Cars and Trucks with High Axle Ratio (3.08-2.23-3.42):
  • Sleeve is manufactured from high-quality aluminum designed to prevent excessive wear due to the reciprocating motion of the steel valve:
  • Each kit contains three springs of varying spring rates to select from to obtain proper shift feel:

Additional Information:

Transmissions: 4L60E 700R4 700R4

Purchase Information:

Size and Weight

Package: 1 ea Weight: 0.20 lbs
Pricing Information:
Base Price:
$57.58

Item In Stock Ready For Shipping
Sonnax Accumulator Valve Train Kit 4L60E 700R4 77777M-K

Additional Information:

Features and Benefits:
Kits Includes
  1. Valve:
  2. Sleeve:
  3. Plug:
  4. Springs (3) Selective:
Detailed Description:
  • Note:
    • 341" valve dia
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406 East Park Ave
Enterprise, Alabama 36330
1-800-762-9846 Inside USA
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