1999 Pontiac Montana Power Train:automatic Transmission Problems

NHTSA component category: POWER TRAIN:AUTOMATIC TRANSMISSION · data through 07/12/2026

25Power Train:automatic Transmission complaints

10.6%Of all 235 complaints

#3Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How power train:automatic transmission ranks on this vehicle

ENGINE AND ENGINE COOLING:ENGINE31 · 13.2%

ENGINE AND ENGINE COOLING29 · 12.3%

POWER TRAIN:AUTOMATIC TRANSMISSION25 · 10.6%

ENGINE AND ENGINE COOLING:COOLING SYSTEM18 · 7.7%

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE16 · 6.8%

Share of the 235 complaints citing each category; one complaint can cite several. Full breakdown on the 1999 Pontiac Montana overview page.

What owners report

“COMPLETE TRANSMISSION FAILURE REPLACEMENT COST $2600. THIS WAS CAUSED BY AN INTERNAL RADIATOR FAILURE, WHICH TRANSMISSION FLUID INTO THE ENGINE COOLANT, DESTROYING ENGINE GASKETS AND…”NHTSA complaint 769055 — filed 10/29/2002

“WHILE DRIVING VEHICLE WILL HESITATE TO SHIFT GEARS,AND WILL SHAKE IF SUDDENLY STOPPED.DEALER CONTACTED.”NHTSA complaint 8016767 — filed 08/20/2002

“PURCHAUSED USED (6 MONTHS OLD) HAVE NOW OWNED AUTO FOR 2 YEARS. AT 38000 MILES TRANSMISSION STARTING SHIFTING HARSH AT TIMES, HAD TO REPLACE TRANSMISSION…”NHTSA complaint 751373 — filed 08/29/2001

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Power Train:automatic Transmission complaints by year filed

Frequently asked questions

Does the 1999 Pontiac Montana have power train:automatic transmission problems?

Power Train:automatic Transmission is the #3 most-reported problem area on the 1999 Pontiac Montana: 25 of 235 complaints on file (10.6%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 1999 Pontiac Montana have in total?

235 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 16 involved a crash, 2 involved a fire, 18 reported injuries, and 1 reported deaths.

What does NHTSA's power train:automatic transmission category include?

NHTSA assigns each complaint to standard component categories; this page reports the POWER TRAIN:AUTOMATIC TRANSMISSION category exactly as NHTSA defines and records it.

About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/12/2026.