Printpartsummary
Symptoms:
  • 1-2 Flare
  • 2-1 Clunk
  • 2-3 Flare
  • Band failure
  • Clutch failure
  • Harsh Reverse
  • Non-adjustable (high) throttle pressure
Cause:

The boost valve wears the inside diameter of the boost sleeve, allowing TV/EPC and reverse oil leakage.

Correction:

These replacement assemblies provide wear-resistant materials, minimum clearance for restored pressure control, and optional O-rings for positive sealing within the bore.

4F50N, AX4N, AX4S, AXOD, AXODE

Boost Valve Kit

Part No.

96201-01K

Boost Valve Kit
  • 96201-01k_combo

  • Boost Valve Kit

Small_96201-01k_combo Small_96201-01k

4F50N, AX4N, AX4S, AXOD, AXODE

Boost Valve Kit

Part No. 96201-01K

  • Sleeve
  • Valve
  • O-Rings (2)

Fits all except 3.0 Liter 12 valve, O-ring style

Complaint:

  • 1-2 Flare
  • 2-1 Clunk
  • 2-3 Flare
  • Band failure
  • Clutch failure
  • Harsh Reverse
  • Non-adjustable (high) throttle pressure

Cause:

The boost valve wears the inside diameter of the boost sleeve, allowing TV/EPC and reverse oil leakage.


Correction:

These replacement assemblies provide wear-resistant materials, minimum clearance for restored pressure control, and optional O-rings for positive sealing within the bore.

Vehicles with an AXOD, AXODE, AX4S or AX4N transmission frequently have flare 1-2 & 2-3 upshifts, high pressure, harsh reverse (300 psi), 2-1 downshift clunk, non-adjustable throttle pressure, and clutch or band failure from poor line rise. This is caused by wear on the inside bore of the boost sleeve allowing TV/EPC and/or reverse oil to either leak to exhaust or cross leak. Sonnax offers boost valve kits for both 3.0 and 3.8 liter applications and sleeves with or without O-rings (factory style) to eliminate the above problems.

  • Sleeves are made from high-quality aluminum to prevent wear.
  • Valves are hard-anodized for longer life.
  • O-ring sleeves prevent leakage between the sleeve and valve body bore.
  • Available in two sizes: 96201-12K (O-ring style) and 96201-13K (factory style) with a small diameter boost valve of .475"; 96201-01K (O-ring style) and 96201-08K (factory style) with a small diameter boost valve of .491".

Click here to view PDF if instructions do not appear below.

It appears you don't have a PDF plugin for this browser. Click here to view the PDF file.

Valve Body Layouts

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Valve Body Layout Ford AX4N/4F50N
Contact a Sonnax Distributor to purchase this part.