2010 Acura TL Owner's Manual - Page 521

Transmission Fluid, Rear Differential Fluid, Transfer Assembly Fluid Reinstall the under cover, tighten the mounting bolt securely, then put the holding clips back in place. Make sure the under cover is installed under the edge of the front bumper. If Acura MTF is not available, you may use an SAE 10W-30 or 10W-40 viscosity motor oil with the API Certification Seal that says ''FOR GASOLINE ENGINES'' as a temporary replacement. However, motor oil does not contain the proper additives, and continued use can cause stiffer shifting. Replace as soon as it is convenient. The transmission should be drained and refilled with new fluid according to the maintenance minder (see page 497 ). If you are not sure how to check and add fluid, contact your dealer. Rear Differential Fluid On SH-AWD models Transfer Assembly Fluid On SH-AWD models The rear differential should be drained and refilled with new fluid according to the maintenance minder. Have your dealer replace the rear differential fluid. Always use Acura ATF-Z1. The transfer assembly fluid should be drained and refilled with new fluid according to the maintenance minder. Have your dealer replace the transfer assembly fluid. Use a SAE 90 or SAE 80W-90 viscosity hypoid gear oil, API service classified GL4 or GL5 only, in the transfer assembly. Viscosity SAE 90: above 0°F ( 18°C) SAE 80W-90: below 0°F ( 18°C) 518 2010 TL