Transmission Fluid Leak Repair Cost (2026)

Fixing a transmission fluid leak costs about $135–$225 for a pan gasket reseal with fresh fluid, $75–$345 for an axle seal and $170–$340 for a cooler line at an independent shop in 2026, using manufacturers’ warranty times (0.7–2.2 hours) at $100–$150/hr. A leak at the front pump or torque converter is a different job: GM’s times are 6.9–16.1 hours, $690–$2,415 in labor alone.

Sources: chain price pages, retailer and manufacturer list prices, official documents (below) · Prices checked 2026-11-09 · By CarWhere Research · Methodology

Transmission Fluid Leak Repair cost by service type

ServiceParts / fluidLaborTypical shop total
Cooler line inspect / reconnect—0.2–0.6 hrFCA inspect and repair$20–$90[1],[2],[3]Labor only: 0.2–0.6 hr × $100–$150/hr; fluid top-up extra
Transmission pan gasket reseal$44–$88Gasket + 1–2 gal ATF0.9 hrFCA Ram HD pan reseal$135–$225[2],[3],[4],[5],[6],[7]GM/F-150 pan gaskets + ATF + 0.9 hr × $100–$150/hr
Axle / output shaft seal$6–$13Plus fluid top-up0.7–2.2 hrGM Equinox 0.7; Nissan AWD 1.0–2.2$75–$345[2],[3],[8],[9],[10],[11]Civic / F-150 seals + 0.7–2.2 hr × $100–$150/hr
Cooler line replacement$19–$100Silverado to F-150 line1.5–1.6 hrGM Malibu cooler pipes$170–$340[2],[3],[12],[13],[14]Line list prices + 1.5–1.6 hr × $100–$150/hr
Front pump / torque converter area leak—Pump and seals extra6.9–16.1 hrGM 8/9-speed crossovers$690–$2,415[2],[3],[15]Labor only: 6.9–16.1 hr × $100–$150/hr

The headline is the axle-seal range, the widest of the common external fixes. Labor times come from manufacturer bulletins for the vehicles named; your car’s book time may differ, so ask for the hours. Before tax, shop-supply and disposal fees. Where we derive a total, labor is hours × $$100–$150 per hour[2],[3]. See the methodology.

DIY vs. shop vs. dealer

WhereCostWhat you get
DIY$5–$90Seal or pan gasket + fluidA pan gasket on a transmission with a drain pan is a reasonable DIY job; refilling to the right level often needs the manufacturer’s check procedure. Seals and lines are harder.[4],[6],[7],[8]
Chain / independent shop$75–$345Axle sealParts plus labor at $100–$150/hr. Cottman Transmission offers a free inspection and computer scan, and says a transmission can leak from nine to eleven external areas, “many of which are considered minor.”[2],[3],[16]
Dealer$155–$225Pan reseal, derivedGM pan gasket and fluid at dealer labor rates ($125–$175/hr).[4],[6],[7],[17],[18]

Transmission stop-leak additives are not for every transmission: Lucas says its Transmission Fix is not recommended for CVT or dual-clutch transmissions.[19]

What drives the cost

  • Where it leaks: inspecting or reconnecting a cooler line is 0.2–0.6 hour; replacing a cooler pipe 1.5–1.6 hours; a front-pump leak 6.9–16.1 hours.[1],[14],[15]
  • Drivetrain: Nissan’s AWD seal job ranges from 1.0 hour on a Rogue to 2.2 on an Altima; GM’s pump job from 7.6 hours on a front-drive Enclave to 16.1 on an AWD XT4.[11],[15]
  • Torque converter seal: GM says the transmission comes out only for a confirmed converter seal leak, which is why that repair costs so much more.[20]
  • Fluid: a pan job loses fluid that must be replaced; 1–2 gallons of ATF is about $25–$50.[6]

When you actually need it

GM describes leaking cooler lines as transmission fluid on the ground under the front bumper, with some drivers having difficulty selecting gears or noticing slipping.[21]

Don’t drive on it indefinitely: NHTSA recall records warn that enough fluid loss can leave a vehicle unable to move, and leaking fluid on a hot surface raises the risk of fire.[22],[23]

If a transmission warning light is on, see the transmission temperature warning light.

Related: P0868 transmission fluid pressure low, P0218 transmission fluid over temperature.

More repair costs

AC recharge (freon) costTransmission fluid change / flush costTPMS sensor replacement costBrake pad replacement costCar battery replacement costCoolant flush costSpark plug replacement costSerpentine belt replacement costTiming belt replacement costWater pump replacement costWheel alignment costTire rotation costShocks and struts replacement costWheel bearing replacement costCV axle replacement costAlternator replacement costStarter replacement costCatalytic converter replacement costFuel pump replacement costRadiator replacement costHybrid battery replacement costEV and Tesla battery replacement costHead gasket replacement costValve cover gasket replacement costOil pan gasket replacement costCoolant leak repair costIgnition coil / misfire repair costABS wheel speed sensor costOil change costAll repair costs →

Frequently asked questions

How much does it cost to fix a transmission leak?

For common external leaks at an independent shop: $135–$225 for a pan gasket with fresh fluid, $75–$345 for an axle seal, $170–$340 for a cooler line. A front pump or torque converter leak can run $690–$2,415 in labor alone.

Is a transmission fluid leak serious?

It can be. Low fluid causes slipping and hard shifts, and NHTSA recalls describe vehicles that stopped moving after losing fluid. Most external leaks are inexpensive if caught early.

Can I use a transmission stop-leak?

Some additives claim to swell seals, but Lucas, for example, says its product is not recommended for CVT or dual-clutch transmissions. Treat it as temporary and check your owner’s manual.

How do I know if it’s transmission fluid?

Automatic transmission fluid is usually red or reddish-brown and collects toward the front-middle of the car. GM describes cooler-line leaks as fluid on the ground under the front bumper.

Sources

  1. FCA US (TSB 21-019-23, via NHTSA), 2023 Ram 1500: transmission oil cooler lines inspect and repair — labor times (2023-07-11), accessed 2026-11-11.
  2. Ratchet+Wrench, 2026 Ratchet+Wrench Industry Survey (posted labor rate distribution, p. 13) (2026-06-29), accessed 2026-11-09.
  3. Ratchet+Wrench, Industry Insights: U.S. Auto Repair Shops and Labor Rate Trends (PartsTech 2025 shop survey) (2026-08-19), accessed 2026-11-09.
  4. RockAuto, 2018 Chevrolet Silverado 1500 5.3L automatic transmission pan gaskets (catalog), accessed 2026-11-11.
  5. RockAuto, 2018 Ford F-150 5.0L automatic transmission pan gaskets, cooler lines and seals (catalog), accessed 2026-11-11.
  6. Walmart, Valvoline MaxLife Multi-Vehicle Full Synthetic ATF, 1 gal (listing), accessed 2026-11-09.
  7. FCA US (TSB 21-024-17, via NHTSA), 2017 Ram 2500/3500: transmission oil pan leaking — inspect and reseal labor times (2017-06-07), accessed 2026-11-11.
  8. RockAuto, 2018 Honda Civic 2.0L transmission output shaft seals (catalog), accessed 2026-11-11.
  9. RockAuto, 2018 Ford F-150 5.0L transmission extension housing seals (catalog), accessed 2026-11-11.
  10. General Motors (Bulletin 16-NA-214, via NHTSA), 2016–17 Equinox: left front drive shaft fluid leak — drive shaft and seal replacement labor time (2017-12), accessed 2026-11-11.
  11. Nissan North America (NTB17-003D, via NHTSA), AWD Rogue / Murano / Pathfinder / Altima: transfer assembly right-side drive shaft oil seal leak — labor times (2022-03-01), accessed 2026-11-11.
  12. RockAuto, 2018 Chevrolet Silverado 1500 5.3L transmission cooler lines (catalog), accessed 2026-11-11.
  13. RockAuto, 2018 Ford F-150 5.0L transmission cooler lines (catalog), accessed 2026-11-11.
  14. General Motors (Customer Satisfaction Program N202301190, via NHTSA), 2020 Malibu 1.5L CVT: transmission fluid cooler inlet/outlet pipe replacement — labor times (2020-05), accessed 2026-11-11.
  15. General Motors (Bulletin 25-NA-001, via NHTSA), 2024–25 crossovers: transmission fluid leak near torque converter housing — replace transmission pump labor times (2025-02), accessed 2026-11-11.
  16. Cottman Transmission and Total Auto Care, Transmission repair: free TransCheck service and computer scan; where transmissions leak, accessed 2026-11-11.
  17. Dealership Guy, Reynolds and Reynolds: repair orders, rates increase for shops (Fixed Operation Golden Metrics 2026) (2026-08-17), accessed 2026-11-09.
  18. Reynolds and Reynolds, The Fixed Operations Golden Metrics 2025 (dealer effective labor rate) (2025-08), accessed 2026-11-09.
  19. Lucas Oil Products, Transmission Fix #10009: seal leaks; not recommended for CVT or dual-clutch transmissions, accessed 2026-11-11.
  20. General Motors (PI0950A, via NHTSA), Torque converter seal: transmission removal only for a confirmed converter seal leak (2015-02), accessed 2026-11-11.
  21. General Motors (Special Coverage N182188930, via NHTSA), 2017–18 Silverado/Sierra HD transmission cooler leak: fluid under the front bumper, slipping or hard gear selection (2019-01-03), accessed 2026-11-11.
  22. NHTSA (Recall 16V-057, 2011 Hyundai Tucson), Transmission cooler hose leak: the vehicle may stop moving (2016-01-29), accessed 2026-11-11.
  23. NHTSA (Recall 16V-548, 2015 Mitsubishi Outlander Sport), CVT fluid hose leak: fluid on a hot surface increases the risk of fire (2016-07-22), accessed 2026-11-11.