Is the mustang manual 5.0 transmission different from 2.3 transmission?

Yes, the manual transmissions in the Mustang 5.0 and 2.3L models are different. While they might both be manual transmissions, they're designed for different engines and torque outputs. The 5.0L V8 produces significantly more torque than the 2.3L EcoBoost four-cylinder, requiring a stronger and more robust transmission. Therefore, they'll have different gear ratios, internal components, and likely different casings. You cannot simply swap them between the two engines.