Torque converter or the transmission oil pump getting worn or a valve in the transmission is sticking.
because the transmission didn't have IT'S fluid chanded every 25,000 miles.Answerthe automatic transmission fluid was changed and the solenoids, but it still will not change gears until the car is warm. AnswerProbably a tired/worn front pump.
The transmission fluid capacity of a 1974 Chevy Nova is 10 quarts. This includes a large amount of fluid which is stored in the transmission and torque converter which is never fully drained.
When a car accelerates slowly, it could just be that the car is not warmed up fully. Another reason for slow acceleration is a problem with the transmission. It could be low on fluid or need to have the fluid and the screen changed.
Fully drained, you will need 7-8 quarts of ATF+4 fluid
Amsoil 75-90 Severe Gear, fully synthetic.
Genuine Toyota ATF T-IV, which is fully synthetic
350 Engines dont have transmission fluid. The Transmission does. Start the engine, leave the trans in Park, pull the dipstick and look at it. fill to full mark when the engine is fully warned up
Without knowing the details of the problem this cannot be answered fully. But changing the fluid and filter will do no harm
Bring to a shop that has the equiment to fully pump out the transmission and torque converter and re-fill system
If it's fully dry, it needs six quarts.
Drive the car long enough to fully warm up the transmission. Put the car in "Park", engage the parking brake and allow the engine to idle. Remove the dipstick for the transmission and wipe it clean. Fully reinstall, then remove the dipstick. Note the level of fluid...should be between the "add" and "full" marks, not be dark or smell burnt.
Since you're asking about transmission 'fluid' rather than lubricant I'll guess you're asking about an automatic transmission. Look under the hood and you'll find two dipsticks (locations are different for the 4 and 6 cylinder engines). One dipstick is for checking oil, the other is for transmission fluid. With the engine completely warmed to full operating temperature remove the transmission dipstick, wipe it off, reinsert fully then remove again. Check the level. If it's low you can add fluid but if you've never changed transmission fluid in your '03 it's due for a full flush and refill anyway. If the level checks ok look carefully at the color of the fluid. If it's bright red you're in good shape. If it's dark colored and especially if it smells burned then you're definitely ready for a trip to the transmission shop. Cheers