Sleeve 4T60E 1-2 servo bore

Sleeve 4T60E 1-2 servo bore Sleeve Piston Seal Spring Spacer 1-2 or Reverse servo Normal operation takes it toll on the 1-2 or reverse servo bore in 4T60 & E units as repeated oscillation eventually wears or scores the bore. Sonnax has designed a 1-2 or reverse servo and sleeve kit, 84791-01K, that contains everything necessary to salvage the case. Symptoms: 2-3 Flare Delayed Forward only in OD range Delayed Reverse Low line pressure No 3rd Reverse slip Cause: The 1-2 or reverse servo bore can become worn or scored from repeated oscillation during normal operation. Correction: This 1-2 or reverse servo & sleeve kit salvages cases with a worn or scored servo bore and improves reverse, 2-3, 3-2 shift control.