Littleton, CO
Fluid flushes, filter replacement, computerized diagnostics, and complete transmission repair for automatic and manual vehicles. AutoTrek's ASE Certified technicians protect one of the most expensive components on your vehicle.
What's Included
From routine fluid maintenance to full diagnostic and repair — AutoTrek handles every aspect of transmission service in-house.
Full system flush using a machine to replace nearly 100% of the old fluid — including what's in the torque converter and cooler lines — with the correct manufacturer-specified fluid.
Transmission pan dropped, pan cleaned, and filter replaced to prevent debris from circulating through the valve body and damaging internal components.
Transmission-specific fault code scanning and live data analysis to identify solenoid failures, sensor issues, torque converter problems, and shift quality faults before they become major failures.
Faulty shift solenoids and speed sensors cause erratic shifting and transmission codes. We test and replace these targeted components to restore smooth operation at a fraction of rebuild cost.
Transmission fluid leaks from pan gaskets, axle seals, output shaft seals, and cooler lines repaired to prevent fluid loss and overheating damage.
Every transmission service includes a road test and post-service scan to confirm smooth shifting, no fault codes, and proper transmission operation across all gear ranges.
Why It Matters
After the engine, the transmission is the most expensive component in your vehicle — costing $1,500–$5,000 or more to rebuild or replace. Yet most drivers never service it until something goes wrong. Transmission fluid degrades over time, losing its ability to lubricate, cool, and hydraulically actuate internal components.
A $150–$250 fluid service at AutoTrek every 30,000–60,000 miles is the single best investment you can make to prevent a catastrophic transmission failure. Colorado's mountain driving and extreme temperature swings make regular fluid maintenance even more critical here than in other states.
Schedule ServiceWarning Signs
Slipping gears — the transmission shifts unexpectedly, pops out of gear, or the engine revs without power delivery.
Delayed or rough engagement — a lag or clunk when shifting from Park into Drive or Reverse.
Shuddering or jerking during shifts — worn fluid, a failing torque converter, or solenoid issues.
Burning smell — overheating or severely degraded transmission fluid. Have this checked immediately.
Reddish fluid puddle under vehicle — transmission fluid leak from a seal, gasket, or cooler line.
Transmission warning light or check engine light — a fault code is stored. Needs diagnostic scan immediately.
Our Process
We pull all transmission-specific fault codes and live data — shift times, fluid temperature, solenoid status — to understand exactly how your transmission is operating.
Machine flush replaces 100% of degraded fluid. Pan dropped, inspected for metal debris (an early indicator of internal wear), filter replaced, and pan resealed.
Faulty solenoids, sensors, seals, or other serviceable components repaired or replaced based on diagnostic findings — always with a written estimate first.
A thorough road test through all gear ranges, followed by a final scan to confirm clean codes and proper shift behavior before your vehicle is returned.
Transmission fluid flush and filter service typically ranges from $149–$249 depending on vehicle make, fluid type, and transmission design. Repair costs for solenoids, sensors, and seals vary and are always quoted in writing before work begins. We never recommend a rebuild or replacement without exhausting less invasive options first. Call (303) 328-3356 for a quote.
FAQ
Book an Appointment
Don't wait for a major failure. Schedule a transmission service or diagnostic and protect one of your vehicle's most expensive components.
8161 S Grant Way, Littleton, CO 80122
Mon–Fri: 9:00am – 5:00pm