A rear main seal leak leaves oil on the transmission bellhousing and can contaminate the torque converter or clutch. We replace rear main seals on all makes — free inspection and written estimate before any work.
"Honest diagnosis, fair price, and the repair was done right. Chicago Transmission has been my go-to for years. Wouldn't trust anyone else with my car."
"The free diagnostic alone was worth the trip. They found the problem fast, gave me a written estimate, and completed the work on time. Exceptional service."
"Family owned and it shows. They treated my car like it was their own. The lifetime warranty on my rebuild gives me total peace of mind. Highly recommend."
It depends on the rate of leakage. A slow seep (a few drops per day) gives you some time — fix it within a few weeks. A heavy leak that drops oil fast is urgent — you risk low oil level damaging the engine, and on manual transmissions, oil contaminating the clutch causes immediate clutch failure.
FWD vehicles without transmission removal: often same-day or next-day. RWD and 4WD vehicles requiring transmission removal: 1–2 business days.
Usually yes — a $600 seal repair is significantly cheaper than a car payment. The exception is if the engine or transmission also has major issues. Free inspection tells you whether the rest of the vehicle warrants the repair.
We'll identify the leak source and give you a written estimate. If it's the rear main seal, we'll tell you exactly what it costs before anything is disassembled. 2450 N Lincoln Ave.
