8/8/2019 Reverse Lockout Valve 55211-11K

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 Wear at the reverse lockout valve canallow TCC Signal and reverse oil tocross leak or leak to exhaust.

This kit includes a wear-resistant sleeve, modified valve and spring toestablish proper pressure, and prevent leakage of TCC signal or reverse oil at the worn bore.

Reverse

Lockout Kit

55211-11K

1 Reverse Lockout Valve1 Reverse Lockout Sleeve1 Reverse Lockout Spring

F-55211-TL

1 Reamer Jig1 Guide Pin1 Roughing Reamer1 Finish Reamer

Note: This tool kit is used for installing

both 55211-11K & 55211-01K.

 Also available

55211-01K

 AFL Valve & Sleeve Kit

Note: Use tool kit above F-55211-TL.

55211-04K

TCC Regulator Valveand Sleeve Kit

F-55211-TL4

Tool Kit for 55211-04K 

COrrection

C ause

D i s t r i b u t o r  

D a t a S h e e t 5L40-EPART NUMBER 55211-11K, F-55211-

©2008 Sonnax Industries, Inc. 55211-11K Rev:-, 55211-11K 11-18-08

800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com • info@sonnax.com

COMPLAINT Loss of reverse, TCC overheat, Burned reverse clutchSECONDARY COMPLAINTs • Burned low and reverse clutch • Transmission damage

Retaining Clip

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Part Summary:

 When in reverse gear, the reverse lockout valve directs reverse fluid into the reverse lockout flui(RLO) circuit to apply the reverse clutch and low/reverse clutch. Wear at the inboard spool borcan allow reverse fluid pressure to enter the TCC signal circuit and partially stroke the TCCregulator valve. This can result in TCC overheat and loss of reverse. The reverse lockout valve alsresponds to TCC signal fluid pressure to block fluid from entering the reverse lockout circuit, thupreventing the reverse clutch and low/reverse clutch from applying while the vehicle is movinforward. If there is excessive bore leakage, TCC signal can cross leak into the RLO circuit, anbegin to apply and burn the reverse clutches or cause transmission damage. This Sonnax sleevevalve and spring kit eliminates bore wear, and reestablishes the correct hydraulic pressures to preventhese problems.

Features & Benefits:

• Highly wear-resistant sleeve provides significantly more valve support to reduce leakage andprevent wear.

• Anodized aluminum valve resists wear to prevent leakage.

• F-55211-TL tool kit already available and also services the 55211-01K  AFL Valve and Sleeve Kit

Guide Pin

Roughing Reamer

Finish Reamer

Reamer Jig

Reverse Lockout Valve

Reverse Lockout Sleeve

ReverseLockout Spring

Must holdminimum

18" vacuum

Rear Control Valve Body