Sonnax Transmission SLEEVE KIT, 4R/5R55E, PR 4R55E 4R44E (1997-18)

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  • Regular price $37.22


Requires Additional Tooling: T-37947-TL5

Placement on Vehicle: Front

Superseded Part Number: 37947-05K

Interchange Part Number: 37947-05K

Surface Finish: NEW

Manufacturer Part Number: S56741P-2K

Other Part Number: 37947-05K

Brand: Sonnax

Hello, If you need assistance finding a part please supply the VIN number of your NORTH AMERICAN vehicle AND the part number you are looking for. Sonnax Transmission SLEEVE KIT, 4R/5R55E, PR 4R55E 4R44E (1997-18)

Symptoms:

  • Delayed engagement
  • Poor shift quality
  • Low line pressure
  • High line pressure
  • Overheating
  • Low cooler flow at idle

Cause:

Wear at the inboard end of the PR valve reduces force, which affects converter feed and engagements, also creating higher line pressure. Wear at the mid-outer end reduces line pressure as it leaks to sump.

Correction:

The Sonnax kits contain a highly wear resistant aluminum sleeve to fit with the OE anodized aluminum valve, providing additional support and proper line pressure control.

4R44E4R55E5R44E5R55E

Pressure Regulator Sleeve Kit
Part No. 37947-05K

(not Included)

Constant oscillation of the pressure regulator valve can cause excessive wear at the balance line end of the bore, allowing balance line pressure to exhaust and preventing the pressure regulator valve from stroking to the lower line pressure position. Severe wear prevents line from entering the converter apply circuit, which will also restrict valuable cooler flow. Sonnax pressure regulator sleeve kit 37947-05K mates with the OE anodized aluminum valve or optional Sonnax pressure regulator valve 37947-54. Use of this sleeve allows the valve bore to be oversized, and the hydraulic integrity of the bore to be restored.

  • Specially toleranced alloy aluminum sleeve is significantly more wear-resistant than the cast -aluminum valve body, and provides more contact surface with the valve for increased stability and durability.
  • Kit includes a replacement solenoid regulator valve spring, which is often damaged during valve body disassembly.
  • The tool kit 37947-TL5 (not included) also works for Sonnax TCC modulator sleeve kit 37947-07K (not Included)
  • Sleeve
  • Retaining Clip
  • Spring (For solenoid regulator valve)

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