14 votes
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Does wheelspinning damage my car?

The short answer is probably not, but you are creating undue hardship on the internals that will likely lead them to fail earlier than they would otherwise. When you drive your car, you are putting ...
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  • 2,045
14 votes
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Is there a benefit to belt driven motorcycles?

Belt vs Chain in Motorcycles It's difficult to say which one is better. Depending on the application, one can be better or not in the particular role. High horsepower applications are not the place ...
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12 votes

Why is it that the front of the car lifts up when releasing the clutch?

Newtons Third Law For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size ...
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  • 32.8k
10 votes

Car pulls to right when letting go of accelerator?

The vehicle in question is a front-wheel drive. FWDs are sensitive to front wheel alignment, since the front suspension and wheel linkages work under different conditions when accelerating and not ...
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  • 1,282
10 votes
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How to shorten a driveshaft?

How can I shorten a drive shaft? The easiest way to shorten a drive shaft is by taking it to the shop and having them do the work for you, to include balancing. I take it this is not what you're ...
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7 votes

Is there a benefit to belt driven motorcycles?

Here are some reasons why some manufacturers use belts. Smoothness of the drive: The belt has the quality of putting down the torque of the engine much more smoothly and gradually than the chain ...
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  • 8,926
6 votes

Car pulls to right when letting go of accelerator?

I pulled the tires off and inspected the front end suspension and steering, and found that the sway bar linkage on the drivers side was detached.
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  • 1,587
6 votes
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Speed difference between rear wheel and front wheel drive

So two things to consider, acceleration from stopped, and top end speed. And based on your question, the following are identical: Engine horsepower Aerodynamics Gear ratios Tire size And the only ...
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  • 9,286
6 votes

Identify that part of my S56 BMW M Coupe

Are you referring to the Driveshaft FlexDisc?
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  • 6,017
6 votes
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Pranged bearing bracket on main driveshaft: can I drive the car?

I don't think it's safe/wise to drive 80 miles on that. It needs to be put on a trailer and dragged home at son's expense (some insurances cover towing also, but 80 miles is a bit far. If you have a ...
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  • 8,612
6 votes

Pranged bearing bracket on main driveshaft: can I drive the car?

My options would be to replace the shaft were it sits now. No fun as a "flat back" job but it is not very hard. Or tow it to a repair site. It does not look like it should be driven. A driveshaft that ...
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  • 11.5k
5 votes

Does wheelspinning damage my car?

In theory, the harder you accelerate or decelerate(brake), the more you put stress on the different parts. Most stressed parts when accelerating, in this order: Gearbox gears Crankshaft Fly bearings ...
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5 votes

Driving simulation while on front jackstands

No. The rear wheels are ALWAYS driven in all Toyota Tacoma models. There is no mechanism to disconnect the rear wheels, while there is a transfer case to engage/disengage the front wheels. Most AWD ...
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  • 6,017
5 votes
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What exactly is an outer CV joint and how can I replace one?

The answer to the first bullet. The roll of the CV or constant velocity joint is to enable movement with independent suspension. As the geometry changes (when you hit a bump), the wheel moves up. If ...
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5 votes
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2009 Ford Focus SE, Vibration returning after replacing Engine Mount

There is a TSB on this issue and a shield to preven rocks from interfering with mount.
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  • 7,950
5 votes
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Subaru clunking and whining - differential?

My WRX is a somewhat different setup but, Subaru being what they are, most of the equipment is very similar. But yesterday, it started making really awful clunking and grinding noises whenever I'm ...
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  • 24.3k
4 votes

1 Piece versus 2 Piece Drive Shaft

A two piece shaft is used to prevent the shaft from bending at high RPM. This is know as the whipping effect. As the shaft will not bend, therefore the transmission tunnel or floor above the shaft can ...
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  • 41
4 votes
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Identify that part of my S56 BMW M Coupe

I think most BMW owners call them a "Giubo". I have no idea where that comes from or why, but you'll find it very easily by Googling it by that name.
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4 votes

What additional wear will occur on the drivetrain from running larger tires and not regearing?

Your automatic transmission is your weakest link The wear will primarily be in your automatic transmission. When starting from a stop your first gear is now considerably taller. When you first ...
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  • 32.8k
4 votes

Does it save wear on AWD drivetrain to shift to Neutral before going into Park or Reverse?

Jerking and thumping when shifting through gears is an indication that you have bad either: bad engine mounts bad transmission mounts bad differential mounts bad axles a combination or all of the ...
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  • 3,363
4 votes
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Throw out bearing, input shaft bearing, or drive shaft support bearing?

Throw out bearings (TOB) usually make noise when only when you press the clutch pedal. The reason for this is, it is the only time it is engaged and actually can make a noise. If you are hearing this ...
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4 votes
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Grinding noise while driving

The diagnosis that you're done pretty much narrows it down to something between the output of the transmission and the wheels, including the brakes. You can eliminate the brakes, by lightly applying ...
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4 votes
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Using 4wd on snow/dry pavement bad for 2012 Pathfinder?

That's an unfortunate scenario. While it's not the end of the world to use 4wd on pavement in your case, you would want to keep the speed low, and avoid tight turns--turn off 4wd if you are going to ...
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4 votes
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clutch makes noise and small vibration when disengaged

It could be a few things really, however its not unheard of to get a faulty or imbalanced clutch as manufacturing faults do occur. The release bearing is always a likely culprit as these do suffer ...
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  • 5,022
4 votes
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Different tread depths on 2wd?

You are exactly right. As long as the tires with the different tread depth is on the non-drive axle, no damage will occur to the differential of the vehicle. You probably realize if you tried to run ...
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3 votes

Car pulls to right when letting go of accelerator?

I've had this behaviour on a number of vehicles and a number of time. Each time it was caused by a different source. These included; Worn out engine mounts causing the engine / gearbox assembly to ...
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3 votes

Downshifting to a stop- wear and tear?

The synchros will be forced to bear the brunt of downshifting like this The synchromesh gears are gears inside the manual transmission designed to help the engine transition smoothly to its new RPM. ...
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  • 39k
3 votes

Why do open differentials drive the wheels on the ground when a vehicle drives on two?

This could work in a car with an open differential and an active traction control system. When the system detects a wheel spin, it actively brakes (and locks out) the particular wheel, as a ...
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  • 2,186
3 votes

1 Piece versus 2 Piece Drive Shaft

One piece designs necessitate a lighter material, such as aluminum, which requires a larger diameter shaft to achieve the same strength as the stock steel shafts. There are several issues with this ...
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3 votes

What is the purpose of plastic engine covers?

the "insulation" on the underside of a hood is not for noise, its a fire blanket. Its supposed to fall down on top of the engine fire as the plastic tabs holding it in place melt. Hood paint peeling ...
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