The transmission lubricant level should be checked monthly.

Refer to Maintenance Scheduling → Regular Service Intervals: Softail Models → Regular Service Intervals: 2006 Softail Models. The transmission should be drained and refilled with fresh lubricant at proper intervals.

NOTE

When checking the transmission lubricant level, motorcycle should be standing straight up. Keep motorcycle upright for a short period of time to equalize lubricant level in the transmission compartments.

Check Lubricant Level

1.	Ride motorcycle until engine is warmed up to normal operating temperature.
2.	When the engine reaches normal operating temperature, turn the engine off and position motorcycle straight up and level.
3.	See Figure 1. Remove the threaded filler plug/dipstick by turning the plug counterclockwise and pulling outward.
4.	Wipe off filler plug/dipstick. Place in filler hole and remove. (Dipstick should rest on lip of filler. Do not screw in tight. Lubricant level should be at the F(ULL) mark on the plug/dipstick when removed.) NOTE Lubricant level should be between the two marks on the dipstick.
	WARNING Be sure that no lubricants or fluids get on tires, wheels or brakes when changing fluid. Traction can be adversely affected, which could result in loss of control of the motorcycle and death or serious injury. (00047d) NOTICE When draining or adding lubricant, do not allow dirt, debris or other contaminants to enter the engine. (00198a)
5.	Add lubricant, if necessary. Do not overfill or leakage may occur. NOTE When filling the transmission, use GENUINE Harley-Davidson FORMULA+ TRANSMISSION AND PRIMARY CHAINCASE LUBRICANT (Part No. 99851-05 quart). The transmission fluid capacity is approximately 24 ounces (0.71 liters). Inspect o-ring for tears or damage. Replace if required. Wipe any foreign material from plug.
6.	Install threaded filler plug/dipstick and tighten to 2.8–8.5 N·m (25–75 in-lbs).

Figure 1. Transmission Filler Plug/Dipstick Lubricant Level

Changing Transmission Fluid

1.	See Figure 2. Remove the threaded check/fill plug.
2.	See Figure 3. Remove transmission drain plug and drain lubricant into a suitable container. NOTE Do not overfill or leakage may occur. The transmission fluid capacity is approximately 24 ounces (0.71 liters). NOTE Dispose of transmission lubricant in accordance with local regulations.
	NOTICE When draining or adding lubricant, do not allow dirt, debris or other contaminants to enter the engine. (00198a) WARNING Be sure that no lubricants or fluids get on tires, wheels or brakes when changing fluid. Traction can be adversely affected, which could result in loss of control of the motorcycle and death or serious injury. (00047d)
3.	Inspect o-ring for tears or damage on the drain plug. Replace if required. Wipe any foreign material from plug.
4.	Install drain plug and tighten to 19–28.5 N·m (14–21 ft-lbs).
5.	Fill the transmission with 20-24 oz. (591-710 ml) of GENUINE Harley-Davidson FORMULA+ TRANSMISSION AND PRIMARY CHAINCASE LUBRICANT (Part No. 99851-05 quart).
6.	Install threaded filler/check plug and tighten to 2.8–8.5 N·m (25–75 in-lbs).
7.	Start engine and carefully check for oil leaks around drain plug.

Figure 2. Transmission Lubricant Check/Fill

1	O-ring
2	Transmission drain plug

Figure 3. Transmission Drain Plug and O-ring