Here's why:
* Parts: You'll need a complete manual transmission, clutch assembly (pressure plate, clutch disc, throw-out bearing), possibly a new flywheel, driveshaft (likely different length), pedals, linkage or hydraulics for the clutch, and potentially modifications to the bellhousing. Finding these parts for a 1998 Ram, especially used parts in good condition, could be difficult and expensive. New parts will be very pricey.
* Labor: Installing a manual transmission is a significant undertaking. It requires a much higher level of mechanical skill than an automatic transmission swap, and the labor costs will be substantially higher. You'll be paying a mechanic significantly more time to do a complete transmission swap than to just replace or rebuild the existing automatic.
* Additional Costs: You might need modifications to the vehicle's frame or other components to accommodate the manual transmission.
* Value: Converting a truck from automatic to manual does not usually add significant value to the vehicle.
While a rebuilt or used automatic transmission might be a relatively expensive repair, it's almost certainly the *cheaper* option compared to a complete manual transmission conversion. The cost of the automatic transmission plus labor for installation will likely be much less than the combined cost of parts, labor, and potential modifications required for a manual transmission swap.
Unless you have a strong preference for a manual transmission and are comfortable doing a substantial amount of mechanical work yourself (which would reduce labor costs), sticking with a rebuilt or replacement automatic transmission is the financially sensible choice.
