NHTSA — Power Train Problems

CarComplaints.com Seal Of This Might Hurt


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
57,350 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2001 Pontiac Bonneville drivetrain problems

drivetrain problem

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2001 Pontiac Bonneville Owner Comments

problem #4

Sep 012009


  • Automatic transmission
  • 25,000 miles


The contact owns a 2001 Pontiac Bonneville. While driving approximately 45 mph, the contact attempted to engage the brakes and the vehicle stalled without warning. The failure occurred on numerous occasions. The vehicle was taken to the dealer on several occasions and repaired. The type of repairs were unknown and the failure recurred. The manufacturer was not notified. The VIN was unavailable. The approximate failure mileage was 25,000. Updated 11/12/14

- Conroe, TX, USA

problem #3

Sep 152008


  • 156,000 miles
The contact owns a 2001 Pontiac Bonneville. While the engine was turned off and the contact was away from the vehicle, the occupant on the passenger side struck the gear shifter. The vehicle rolled three feet. The passenger was able to shift into park and the vehicle stopped. Whenever the shifter moves out of gear, the vehicle will roll continuously. The failure occurs whether the engine is on or off. The vehicle has not been repaired. The contact was concerned of the safety risk involved. The failure and current mileages were 156,000.

- Barmun, MN, USA

problem #2

Sep 262003

(reported on)


  • miles
Certified ltr reporting defective transmission performance on a 2001 bonnevile.

- Pocahontas, AR, USA

problem #1

May 152003


  • Automatic transmission
  • 48,400 miles
Our problems started with the transmission slipping at initial launch. A real suprise and safety concern when pulling into traffic. This would happen without warning. I dropped the transmission oil pan and revealed metal debris and gear teeth. Upon further investigation, I have learned that a (alleged) defective thrust bearing, supplied (1999) by GM's supplier, fails and destroys the 'sun/reaction gearset' and the debris contaminates the inside workings of this 4T65-E transmission. Just showing the debris to the GM service manager, they offered to do a 50/50 split on repairs. I insisted on 100% since the transmission didn't even make it to the recommended 50K oil and filter change. With the fact of not getting a written estimate, but a verbal estimate of a max cost to me of $3500 for the repair, I had an independent rebuild the unit. There is a technical service bulletin #03-07-30-017 issued May 7, 2003, describing the dealer fix (rebuild) for this failure. This tsb covers this model trans that is used in 1999-2002 Buick century, Lesabre, Park Avenue, Chevrolet Monte Carlo, Venture, Oldsmobile intrigue, Silhouette, Pontiac Bonneville, Grand Prix, Montana, 2000-2002 Chevrolet Impala, 2001-2002 Pontiac aztek, 2002 Buick rendezvous, all with the transaxle auto 4-speed, 4T65E(RPO MN3) there is a technical service bulletin written #03-07-30-017 issued May 7, 2003. It is also understood that the replacement thrust bearings are correctly made now, and for the 2004 model of this transmission, GM is using a special coating (balzer coating) on the 'sun/reaction gearset' to increase durability of the components

- Chardon, OH, USA

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