1999 Mercury Cougar Power Train:automatic Transmission Problems
NHTSA component category: POWER TRAIN:AUTOMATIC TRANSMISSION · data through 07/14/2026
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
Share of the 454 complaints citing each category; one complaint can cite several. Full breakdown on the 1999 Mercury Cougar overview page.
What owners report
“THERE IS A HUMMING NOISE IN THE TRANSMISSION THAT WON'T GO AWAY. ALSO, THERE IS A CLANKING NOISE WHEN SHIFTING GEARS.”NHTSA complaint 864509 — filed 06/29/2000
“WHILE DRIVING AT ABOUT 70 VEHICLE WILL DOWNSHIFT ON ITS OWN. IF A VEHICLE WAS BEHIND IT MAY HAVE BEEN RUNNED OVER.”NHTSA complaint 859432 — filed 03/30/2000
“TRANSMISSION SURGES AND HESITATES UPON ACCELLERATION CAUSING UNEXPECTED INCREASES IN SPEED; REAR HATCH WILL NOT OPEN; BRAKES STILL GRIND AFTER REPLACEMENT; AFTER DOOR LATCHES REPLACED…”NHTSA complaint 717908 — filed 01/26/2000
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 Mercury Cougar have power train:automatic transmission problems?
Power Train:automatic Transmission is the #3 most-reported problem area on the 1999 Mercury Cougar: 31 of 454 complaints on file (6.8%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 1999 Mercury Cougar have in total?
454 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 23 involved a crash, 3 involved a fire, 27 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.
