Differential or transmission are whining. One of the symptoms that is most commonly associated with bad or failing differential or gear oil is a noisy transmission or differential. If the gear oil runs low, or becomes excessively dirty, it can cause the gears to whine or howl as they turn. Common causes include low transmission fluid, wrong viscosity (thickness) of fluid, or required adjusting of the shift cables or clutch linkage. The nose knows when it comes to things being not quite right with your vehicle. The Top 5 Symptoms of Low Fluid Levels in Manual Transmissions Below are the top 5 symptoms for a manual transmission with low transmission fluid levels. 1) Engagement Delay – Low transmission fluid levels will likely cause there to be a delay when you shift gears because the transmission needs fluid pressure to initiate the gear change. Adequate clutch fluid enables quick shifts as well. When transmission fluid is low, slow or sluggish gear shifts are the norm. This can make driving a laborious experience. 4. Vehicle Lurching. Low fluid levels may cause the vehicle to lurch forward and backwards when driven. Generally speaking, if the vehicle isn't running as well as it normally does, it can indicate low transmission fluid, especially when it comes to problems with shifting. Common Signs of Low Transmission Fluid Low transmission fluid levels are the most common problem associated with transmissions. Full Answer. A vehicle with a manualtransmission may have difficulty going into gear when transmissionfluid is low. It may also pop out of gear, with the gearshift sliding back to the neutral position without warning. Symptoms Of LowTransmissionFluid Quality Ford. Loading Unsubscribe from Quality Ford? Cancel Unsubscribe. Working Subscribe Subscribed Manual transmission problems can develop due to high mileage, abuse, or lack of proper maintenance. But they are rather rare. Most manual transmission issues originate not with the transmission itself, but from related components like the clutch assembly, linkage, or driveline: the components that transmit turning power from the transmission to the wheels. Signs of a Failing Transmission. so if you notice your fluid is running low it is almost always caused by a leak. If you have a manualtransmission, HM-290/5LM60 5-speed manualtransmission - Manualtransmissionfluid P/N 1992 Chevy Silverado 1500 Stepside 4.3L My '88 Burb has the 3-speed manual w/Granny Low.