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Montana · Article Updated May 26, 2026

Transmission Defects Under the Montana Lemon Law

Transmission failures that qualify under Montana's lemon law — slipping, harsh shifting, DCT and CVT defects, mountain-grade overheating — under the 4-attempt / 30-business-day presumption.

Transmission defects are among the most common qualifying defects under the Montana Lemon Law. A transmission that slips, shudders, or fails to shift safely substantially impairs use and value — reachable under the 4-attempt / 30-business-day presumption.

Common qualifying transmission defects

  • Slipping — failure to hold a gear or RPM surges.
  • Harsh or delayed shifting — clunking, lurching, hesitation.
  • Mountain-grade overheating — towing and long climbs stress the transmission.
  • Dual-clutch (DCT) defects — shuddering, overheating, premature wear.
  • CVT defects — judder, belt/chain failure, overheating.
  • Complete failure / loss of drive; limp-home mode.

Montana factors

  • Mountain grades (the Rockies, Continental Divide) stress transmissions on long climbs and descents, and with towing (trailers, stock, boats).
  • Extreme cold thickens fluid and stresses cold-shift behavior.
  • Vast distances mean high mileage — beat the 18,000-mile cap — and parts delays run up the 30-business-day count.

No one-attempt rule

Montana has no one-attempt safety shortcut — transmission defects use the 4-attempt / 30-business-day track. A transmission that loses drive on a mountain grade can still anchor a CPA theory.

Proving the case

  • Repair orders describing the same transmission symptom across visits (note mileage).
  • Parts-on-order notes documenting out-of-service time.
  • TSBs for known transmission defects.

Bottom line

Transmission defects that slip, shudder, overheat on grades, or fail to shift readily qualify under Montana’s presumption. Document each attempt and beat the 18,000-mile cap. Get a free case review.

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