Are manual transmissions interchangable on 1998 and 1999 sunfire with 2.4l engines?

Not necessarily. While both 1998 and 1999 Pontiac Sunfires with 2.4L engines likely used similar manual transmissions, there's no guarantee of interchangeability without verifying the specific transmission model numbers. Even if the transmission *looks* the same, internal components, bell housings (the part that connects to the engine), input shafts, and other details could differ slightly between model years.

To confirm interchangeability:

1. Find the transmission model number: This will be stamped on the transmission case itself. You'll likely need to get under the car to see it.

2. Compare the model numbers: Once you have the numbers for both transmissions (the one in the car and the potential replacement), cross-reference them against a parts catalog or a reliable online database. This is the only definitive way to know for sure.

Ignoring this could lead to problems with fitment, misalignment, and potential damage to your engine or transmission.