Q: Overdrive not working
My overdrive is not working.
Greetings! You have a 4T65E transmission. A transmission used in the Pontiac Montana and Pontiac Aztek by GM for about 10 years. About 4 years into production they started receiving complaints about no overdrive and no fourth gear. It was caused by worn splines on the fourth gear shaft. The shaft not only controls fourth gear but overdrive as well. They ended up fixing the issue by producing the later transmissions with strengthened fourth gear shafts. Replacing the shaft will usually do the trick. The shaft is available for purchase individually but it will require installment by a transmission’s specialist or a full service shop.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
What others are asking
How should I rotate my tires and how often should it be done?
Tire rotation is an important part of vehicle maintenance. If you don’t rotate your tires regularly, the drive tires will wear down very quickly (the front two tires on the Civic, since it’s a front-wheel drive car). The rear tires...
Wheel shaking
Hi there. It sounds like your tire may be what's called "cupping". That's when cup like patterns are worn into the tire causing it to vibrate and shake the car. I would inspect the tire for cupping and if they...
Car leaking gas
A fuel leak can be a very dangerous situation. Your car needs to be inspected and fixed as soon as possible. Fuel leaks can come from a cracked fuel tank or damage on any of the lines that run the...
Click in steering wheel while turning
Realize that steering columns are a column, but they still need to flex. They are turning and they don't go straight to the steering box at angles. So they have universal joints, and a lot of times those universal joints...
VSC and Traction control lights on after wheel alignment. Unable to reset/recalibrate
A faulted sensor like the steering angle sensor (https://www.yourmechanic.com/services/steering-angle-sensor-replacement) can cause these systems to malfunction. A steering angle reset is required with an alignment on these vehicles and involves a procedure that includes disconnecting the battery. If you'd like a...
I turn the key and nothing happens
Be sure any engine immobilizer system (security system) is not activated, thus preventing the car from starting. The battery should be load tested by a professional. Load testing can only be reliably performed on a fully charged battery. If the...
USED AUTO PARTS
Hi There, You may want to considered purchasing re-manufactured parts as these are generally rebuilt and many times will offer the same warranties as new parts, but are usually available for much less. Sometimes used parts are available and may...
I have a Audi 2007 q7 and my epic light is on and my cars shakes a little while driving and idling a little what could I.t be
You will need to have the computer tested to find out what codes are stored in memory and then have those codes tested to find out why the check engine light and EPC light is on. A mechanic like one...
Related articles
The Guide to Colored Curb Zones in Montana
Montana Montana drivers are well aware of the laws and regulations that apply to them when they are out on the roads and driving. They know they need to obey the speed limits and use their signals when turning and...
Understanding the Pontiac Oil-Life Monitor and Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Pontiac Oil Life Monitor (OLM) indicates when and what service your car needs.
How to Buy a Classic Pontiac
Whether you want to buy a classic Pontiac for yourself or as a gift, here are some tips on buying one for a great value.
Browse other content
Estimates
Maintenance