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Original price was: $2,799.00.$2,549.00Current price is: $2,549.00.
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Original price was: $3,149.00.$2,849.00Current price is: $2,849.00.
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Original price was: $3,149.00.$2,849.00Current price is: $2,849.00.
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Original price was: $3,149.00.$2,849.00Current price is: $2,849.00.
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Original price was: $3,149.00.$2,849.00Current price is: $2,849.00.
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Original price was: $3,149.00.$2,849.00Current price is: $2,849.00.
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Original price was: $3,149.00.$2,849.00Current price is: $2,849.00.
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Original price was: $3,149.00.$2,849.00Current price is: $2,849.00.
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Signs your AX4N/AX4S is failing
Catch these early and you replace one transmission, not a transmission and a tow bill.
No overdrive
The overdrive band or clutch has worn out.
No reverse
Often a failed planetary or low-reverse component.
Slipping when warm
It shifts fine cold, then slips once the fluid heats up.
Shudder at cruise
Torque converter clutch shudder at highway speed.
Clunk into gear
Worn internals or mounts cause a hard engagement.
Grinding noise
Can point to planetary gear damage. Stop driving it.
Used vs. rebuilt vs. reman AX4N/AX4S
| Used | Rebuilt | Remanufactured | |
|---|---|---|---|
| Wear parts replaced | None | Failed parts only | All of them |
| Known weak points addressed | No | Rarely | Yes |
| Testing | "It ran" | Basic | Dyno-tested |
| Typical warranty | 30–90 days | 6–12 months | Up to 5 years |
AX4N/AX4S questions, answered
What is the difference between the AX4S and AX4N?
The AX4N is the later, non-synchronous version of the AX4S, with revised shift control. They are not interchangeable without checking your application.
What vehicles use the AX4N or AX4S?
These transaxles were used in the Ford Taurus, Mercury Sable, Ford Windstar and Freestar, and Lincoln Continental. Confirm your year and engine before you order.
Are AX4N transmissions reliable?
They can be reliable when maintained, but planetary and overdrive failures are common at high mileage. A remanufactured unit replaces those wear parts and is tested before it ships.