Skip the auto shop - Our mechanics make house calls

Q: Van jumps forward on the drive gear

asked by on

Had Van checked by a mechanic. It had been overheating and was leaking steering power fluid. Also it jumps forward making a hard thumping sound. New water and power steering pumps were installed by the mechanic. But problems continue: 1. Still leaks power steering power fluid. 2. Van continues leaping forward when drive gear is engaged. What could be the cause?

My car has 150000 miles.
My car has an automatic transmission.

Hello and thank you for your question. For the issue of the transmission jumping forward and making a thumping sound, there could be a few different things that cause the situation and sound. First check the condition of the brakes and make sure that they are in good shape.

Second, check the idle on the engine to make sure that the idle is not too high. If the idle is too high, then the transmission torque converter will produce multiplied torque and lunge the transmission forward when putting into gear. First gear has a higher gear ratio, so it is more common to feel the lunge in first gear apposed to reverse gear. For the power steering leak, you will need to clean off the entire power steering system and then recheck for the leak and determine the source of the leak. If you need assistance with your vehicle, then seek out a professional mechanic to inspect why your power steering fluid is leaking.

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

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: Can a power steering leak make a car jerk?

If the fluid level is low, or there are other faults such as a loose power steering pump drive belt, you might experience that effect, that is jerking and/or lack of smoothness in the steering feedback that you feel when...

Q: Ok I changed the wheel bearings in a 1999 Ford Explorer Sport and after I changed the grinding got worse and tire gets super hot

If it is a 4WD or AWD Explorer, then it should be a hub/bearing assembly. It's possible you have a defective assembly or possibly over-tightened the castle nut and damaged the new bearing. Same can apply if it a 2WD...

Q: I got my car check out and the codes come up was P0171,P0431,and P0174. How much will all this will be so I can start driving my c

Codes P0171 and P0174 indicate the engine control unit is detecting the engine is running too lean - too much air and not enough fuel. P0431 indicates the catalytic converter is not operating at peak efficiency - not cleaning up...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.