K & W CRC Trans-X High Mileage Automatic Transmission Treatment 16 fl oz — stop-leak formula, improves shifting

K & W CRC Trans-X High Mileage Automatic Transmission Treatment is a 16 fl oz stop-leak formula designed to reduce leaks and improve shifting for vehicles with 75,000+ miles.

Trans-X was created for older automatic transmissions that need a practical, maintenance-friendly solution to seal small leaks, reduce slipping, and recover smoother gear changes without an immediate teardown. This product is a fluid additive and leak repair treatment compatible with most automatic transmissions (not for CVT or manual gearboxes). It is intended to be used as part of routine service or to delay more invasive repairs by conditioning seals and restoring internal leakage control.

How does Trans-X stop transmission leaks?

Trans-X uses a blend of conditioners and seal-swelling agents that interact with aged rubber and polymer seals to reduce seepage. It does not weld or permanently bond metal parts, but it helps swell and soften worn seals so they better conform and limit fluid loss.

• Formulated to penetrate and condition hardened seals and gaskets.
• Reduces small external seepage that develops with age and mileage.
• Compatible with most automatic transmission fluids when used per directions.
• Meant as a maintenance step, not a chassis rebuild substitute.

Will Trans-X fix slipping and rough shifting?

Trans-X can improve shifting feel in many high-mileage automatics by restoring proper pressure and seal integrity, which helps minimize internal fluid loss that causes slipping. Results vary by vehicle condition and the extent of internal wear.

• Helps restore smoother upshifts and downshifts by improving hydraulic function.
• Can reduce short-term slipping caused by poor sealing or low fluid retention.
• Not effective for severe internal mechanical damage or burnt fluid conditions.
• Best used alongside correct fluid level checks and scheduled maintenance.

How do I use Trans-X safely and effectively?

Use Trans-X as directed on the product label: add the recommended amount to the transmission fluid with the engine off and at the proper fluid temperature, or follow service manual guidance. Observe all safety precautions; the fluid is flammable and requires good ventilation and protective gear during handling.

• Apply only to automatic transmissions; not compatible with CVT or manual systems.
• Follow the dosage on the bottle for a 16 fl oz treatment volume.
• Wear gloves and safety glasses; store in a cool, ventilated area away from sparks.
• Check fluid level and road-test to confirm improved shifting after treatment.

How long will results last and when should I seek professional service?

Duration of improvement depends on seal condition and overall transmission wear; many users see weeks to months of reduced leakage and better shifting, but severe mechanical issues require shop attention. If slipping persists, noises continue, or fluid is discolored/burnt, consult a qualified technician.

• Often extends between-service performance, delaying minor repairs.
• Does not replace mechanical repairs for torn seals, broken bands, or clutch failure.
• Monitor fluid condition and check for recurring leaks after treatment.
• If symptoms worsen, stop use and seek professional diagnosis.

Who is this for? K & W CRC Trans-X High Mileage Automatic Transmission Treatment is aimed at owners of cars, SUVs, and light trucks with automatic transmissions and 75,000 miles or more who want a preventative or interim repair option to address leaks and improve shifting without immediate disassembly. It’s suitable for DIYers and fleet managers seeking a cost-effective maintenance additive, provided they follow the safety and application instructions. This product is not intended for continuously variable (CVT) or manual transmissions and should be used alongside routine fluid checks and standard service practices.