Skip the auto shop - Our mechanics make house calls

Q: My car won't go past 35mph

asked by on

Hi. My car will not shift to third gear n it wont go pass 35-40 mph without the rpm going higher. I got a rebuilt tranny about 11 months ago n the car was running great for about 4 months. I went up a hill n stepped on the gas n sped up to 55 mph n then the problem came back that instant. I was unable to go into 3rd gear again n couldnt go pass 35-40 mph. The rpm would go higher but my speed didnt want to go faster. The oil meter would go higher when i stepped on the gas n would go back down when i let go. I had someone look at it n tried to find the problem but no progress. The head gaskets has been changed with new bolts, changed my spark plugs, flushed out my fuel system n put the car back together. It drives but it still will not go pass 35 mph. Sometimes when i put the car in drive it says nuetral. When i was on a hill one day the tranny fluid spilled out. Like something was loose.

My car has 160000 miles.
My car has an automatic transmission.

A: Hi there. From the description you provided...

Hi there. From the description you provided, your vehicle has problems with the transmission again. You stated it will not shift into 3rd gear again, like before the transmission was rebuilt. If the transmission is again the problem, it should be covered under warranty. It could be a faulty shift solenoid. The shift indicator not reading properly could be a faulty transmission position sensor. If this is an overall lack of performance issue, according to your last statement, then possibly you have a restriction in the exhaust system. I recommend having your vehicle’s problems inspected and diagnosed by a certified technician from YourMechanic.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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

Get a quote

What others are asking

Q: Why would a vehicle go into reverse but not drive

The fluid level could be too low. New fluid replenishes the detergents and that could cause lots of stuff to become entrained and do two things: the contaminants newly circulating in the fluid travel to the filter and plug it...

Q: AC not working

Hi. If the pressure in the AC system isn't enough, the computer will never cycle the compressor on and no cold air will flow, I suggest having the car tested for leaks. If no leaks are present, a certified mechanic,...

Q: oil leak

I can't really give you a positive yes or no answer as to whether stop-leak products will cure the problem. From experience however, I have seen them work for a time, I have seen them not work at all, and...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...