Section 5 - Maintenance
90-866938081 MAY 2009 Page 103
2. Remove the dipstick. Wipe the dipstick with a clean, lint‑free cloth.
Transmission dipstick, with cover removed for clarity
3. Insert the dipstick, resting it on the top of the threaded hole.
4. Remove the dipstick and check the oil level indicated. The oil level should be between
the maximum and minimum marks on the dipstick.
NOTE: Oil from the transmission oil cooler and hoses may drain into the transmission,
causing an oil level slightly above the maximum mark.
Checking—dipstick resting on top of threaded hole
a - Maximum mark
b - Minimum mark
c - Top of threaded hole
d - Dipstick
5. If the level is correct, install the dipstick.
6. If the level is low, add the specified transmission oil through the dipstick threaded hole
to bring the level up to the maximum mark on the dipstick.
Description Fluid Type Fluid Part Number
Transmission and drop box
Synthetic Power Steering Fluid SAE
0W‑30
92‑858077K01
NOTE: If the transmission oil level is extremely low, contact your local Cummins MerCruiser
Diesel Authorized Repair Facility.
IMPORTANT: For a more accurate measurement, operate the engine at 1500 RPM for
three minutes immediately before checking the oil level.
7. Start the engine and operate at 1500 RPM for three minutes to fill all the hydraulic
circuits.
8. Stop the engine and quickly check the oil level.
9. If the oil level is low, add the specified transmission oil to bring the level up to the
maximum mark on the dipstick.
10. Install the dipstick.
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