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Ford AOD Boost Valve Kit O-ring Style 76990K SONNAX

Ford AOD Boost Valve Kit O-ring Style 76990K SONNAX

by Sonnax
SKU S76741TK
$36.77 - $36.77
$36.77
$36.77 - $36.77
$36.77
Availability:
in stock, ready to be shipped

Delivery time

You will receive your package in 2–5 business days within the contiguous U.S.

Brand: Sonnax

Type: Valve Body

Interchange Part Number: S76741TK

Manufacturer Warranty: No Warranty

Items Included: AOD Boost Valve Kit

Manufacturer Part Number: 76990K

Material: Aluminum

Country/Region of Manufacture: United States

Universal Fitment: Yes

Vintage Part: No

Performance Part: Yes

AOD Transmission Valve Body

Boost Valve Kit
Part No. 76990K

O-Ring Style

Vehicles with Ford AOD transmissions frequently have problems with poor line rise, which results indirect clutch failures and soft shift slides. These complaints are often caused by severe wear of the pressure regulator boost sleeve, allowing oil leakage. The hardened steel boost valve continuously reciprocates within the aluminum boost sleeve, and wears the inside diameter of the sleeve. This excess leakage can be eliminated by installing Sonnax boost valve kit 76990K.

  • Highly wear-resistant aluminum sleeve prevents wear
  • O-Rings on sleeve provide positive seal in the casting bore
  • Steel valve has been tightly toleranced to allow minimum clearance with the inside diameter of the sleeve
  • Sleeve and valve restore the hydraulic integrity of the assembly
  • Drop-in Zip Valve™ parts install quickly and easily
Boost Valve Ratios
Part Numbers Ratios Great for these Applications
76990K & 76990-03K .545" Spool Standard Ratio Standard OE
76990-04K .553" Spool Large Ratio Large Ratio OE & High Performance

O-Ring seals are added insurance against boost oil loss. Sleeve can be installed without these seals, but their use is recommended

  • Valve
  • Sleeve
  • O-Rings (3)

Symptoms:

  • Soft slide shifts
  • Delayed Reverse
  • Low line rise
  • Direct clutch failure

Cause:

Severe wear of the pressure regulator boost sleeve allows boost oil leakage.

Correction:

The Sonnax drop-in kit includes a highly wear-resistant aluminum sleeve to restore hydraulic integrity, and incorporates O-rings to provide positive sealing in the casting bore.

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