How to check transmission oil - 2001 Harley Davidson FXDL Dyna Low Rider

Slide the transmission oil drain pan from under the transmission oil filter. Fill the hydrostatic transmission oil filter reservoirs with new hydrostatic transmission oil. Pour the transmission oil into the reservoirs by hand. Fill the oil reservoir to the full line that is embossed on the side of the reservoir tank.

Check to see if it is transmission oil or engine oil. If engine oil then the crankshaft oil seal needs to be replaced. If it is transmission oil, your torque converter maybe leaking. Before doing anything major try checking the hoses that connects from the transmission to the radiator. They could cracked or leaking. Some transmission use oil coolers and ATF filer on the transmission case itself. Check if they aree properly tightened.

most automatic transmission use a cooler located in a radiator tank to cool the transmission oil
check for oil pipe s in one of the tanks
Personally , I find that it is more efficient to use an air to air oil cooler for automatic transmissions as the radiators are running hard to cool both the engine and the hot oil from the transmission
As the transmission oil gets to excess of 150C the oil is never less than 100C from the radiator but using the external cooler , the temp can come down to ambient temp or less making for better oil life in the transmission
Talk with professional transmission shops to get more advice

if youre asking about the transmission fluid - it usually has a yellow handled dipstick saying Trans Fluid or something that allows you to check the level. transmissions usually generally take ATF (automatic transmission fluid) unless otherwise specified, just check the owners manual if u have it.

same goes for the oil, best to just check the manual for the oil type such as 5w30 or 10w30, otherwise it should say on a sticker/label underneath the hood somewhere. there will be another dipstick like for the transmission to check the oil level from the oil pan.

Is the transmission oil still a bright red colour or has it gone milky ( coolant in the transmission oil from a failed radiator cooler) check engine coolant for oil contamination ( transmission oil in the radiator from failed oil cooler)

Your radiator needs to be replaced. Chances are you have transmission and oil cooler lines going through them and there are mixing inside the radiator.

There are two types of transmissions in 1991 Toyota Corolla. Manual Transmission and Automatic Transmission.
1. Manual Transmission:
The transmission oil is checked through a level bolt which is provided to the left CV joint side in the middle of transmission. To check the oil level, park the car on a level floor, remove the level bolt with 22 mm or 24 mm spanner. If the oil starts coming out of this hole the oil level is considered OK. If not, top up the oil till it starts coming out and tighten the bolt. The recommended manual transmission oil grade is 75W/ 90W and total capacity is 2.4 Litres.

2. Automatic Transmission:
Warm up the engine, park the car on level floor, pull up the hand brake, gear lever stick in P, keep the engine start, let the radiator fan come on, take the auto-transmission stick out, wipe it with a clean dust free cloth, insert it in, again take it out, keep the stick in horizontal position and check the oil level. At operating temperature the auto-transmission oil level should be at upper level (Hot). If not, add oil to mach the mark. The recommended auto-transmission oil is Automatic Transmission Fluid (ATF) Dexron II, and total (drain and refill) capacity is 1.4 Litres.

WELL IF ITS ENGINE OIL SHOOTING OUT CHECK AROUND OIL PRESSURE SENDING UNIT AND OIL FILTER SEAL LEAKING OR OIL FILTER HAS A HOLE IN IT. IF YOU TALKING ABOUT TRANSMISSION CHECK TRANSMISSION COOLER LINES GOING FROM TRANSMISSION TO RADIATOR.

TRANSMISSION FLUID LEAKS,CAN BE FOUND AROUND PAN GASKET.CHECK PAN GASKET,IF IT LOOKS WET AND YOU SEE FLUID DRIPPING AROUND THE EDGE OF OIL PAN, REPLACE PAN GASKET, WHILE YOU REPLACING PAN GASKET REPLACE TRANSMISSION FILTER WHILE OIL PAN OFF.IF TRANSMISSION OIL PAN NOT LEAKING, CHECK TRANSMISSION OIL COOLER LINES GOING INTO RADIATOR YOU WILL LOOSE A LOT OF FLUID THERE ALSO TORQUE SHAFT SEAL WILL CAUSE HEAVY FLUID LEAK WHILE ENGINE RUNNING CHECK OIL COOLER LINES AND LOOK AT THE TORQUE AREA WHILE ENGINE RUNNING YOU WILL SEE FLUID POURING WHILE ENGINE RUNNING THE OIL PUMP PRESSURE WILL PUSH FLUID OUT AT THE LEAKING AREAS.

HIGH PITCH WHINNING NOISE IS FAULTY TRANSMISSION OIL PUMP.HAVE THE TRANSMISSION FLUID PRESSURE CHECK AT A TRANSMISSION SHOP.IF TRANSMISSION OIL PUMP TOO WEAK OR MALFUNCTION.YOUR TRANSMISSION WONT HAVE ENOUGH OIL PRESSURE FOR FORWARD GEAR , REVERSE GEAR, BAND OR SHIFT VALVES IN VALVE BODY.NOTHING WILL WORK TRANSMISSION.OIL PUMP LIKE HYDRALIC PUMP KEEPS EVERY THING WORKING..