According to Au7o's analysis of 780+ owner reports, the 2011 Acura RL has 1 documented issue. No issues are rated critical, indicating generally reliable ownership. The most commonly reported issue is SH-AWD Torque Transfer Unit / Rear Differential Clutch Noise with 780 owner reports. Across all issues with published estimates, repair costs range from $300 to $3,000. DIY maintenance guides at au7o.io.
On the 2005-2012 Acura RL, the 2nd-gen RL's Super Handling All-Wheel Drive uses a torque transfer unit (TTU) at the transaxle output plus a rear differential containing electromagnetic clutch packs for variable side-to-side torque distribution. With age and fluid breakdown, both can develop a low-speed grinding or moaning noise — most often the rear unit's electromagnetic clutches when SH-AWD fluid is contaminated or below spec.
Drain and refill the rear differential with Honda Dual Pump II fluid — do NOT use conventional gear oil. If noise persists after fluid change, the rear differential unit needs rebuilding with new clutch packs. Replace the electromagnetic actuators if they are not engaging properly. Regular fluid changes every 30,000 miles prevent premature clutch pack wear.
Owner tips & cautions
TipChange the rear diff fluid to Honda Dual Pump II every 30,000 miles — this is the single most neglected maintenance item on the RL and the most common cause of SH-AWD noise. Most independent shops use the wrong fluid which accelerates clutch pack wear.
According to Au7o's analysis of 780+ owner reports, the 2011 Acura RL has 1 documented issue. The documented issue is: SH-AWD Torque Transfer Unit / Rear Differential Clutch Noise. None are rated critical, but regular maintenance is recommended.
Is the Acura RL reliable?
The 2011 Acura RL has 1 known issue documented across 780+ owner reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Acura RL problems?
Repair costs for known Acura RL issues range from $300 to $3,000, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2005-2012 Acura RL SH-AWD Torque Transfer Unit / Rear Differential Clutch Noise?
The 2nd-gen RL's Super Handling All-Wheel Drive uses a torque transfer unit (TTU) at the transaxle output plus a rear differential containing electromagnetic clutch packs for variable side-to-side torque distribution. With age and fluid breakdown, both can develop a low-speed gri… Repairs typically run $300-$3,000. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
