14
votes
Accepted
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 ...
- 33k
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 ...
- 33k
10
votes
Accepted
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 ...
- 153k
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 ...
- 8,956
6
votes
6
votes
Accepted
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 ...
- 9,326
6
votes
Accepted
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 ...
- 8,672
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 ...
- 11.6k
5
votes
Accepted
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 ...
- 114
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 ...
- 6,037
5
votes
Accepted
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.
- 8,010
5
votes
Accepted
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 ...
- 24.3k
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 ...
- 33k
4
votes
Accepted
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.
- 153k
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 ...
- 3,363
4
votes
Accepted
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 ...
- 153k
4
votes
Accepted
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 ...
- 14.4k
4
votes
Accepted
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 ...
- 288
4
votes
Accepted
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 ...
- 5,057
4
votes
Accepted
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 ...
- 153k
3
votes
Is there a benefit to belt driven motorcycles?
This is more additional points to the above (good) answers.
With cost per mile it probably depends a lot on the OE parts prices. With the old Kawasaki belt system used in the 1980s they lasted maybe ...
- 561
3
votes
Accepted
Drivetrain sounds like rustling leaves above 4k RPMs
Unfortunately I can not pinpoint your issue, but will give you the information I have. Since the noise is not speed dependent, yet does not exhibit itself when the transmission is not engaged (either ...
- 153k
3
votes
Fixing vibrations caused by replacing springs?
With the moderate amount of lift you've described (1" to 1.5"), you shouldn't need a to drop your transfer case.
Dropping the transfer case is done to straighten the angles on the front and rear ...
- 818
3
votes
New engine and clutch, have weird vibration @3K RPM
Since the issue happens only when the clutch is engaged the problem is not with the engine, flywheel, or pressure plate. Since it isn't speed dependent, but RPM dependent, we can eliminate the drive ...
- 153k
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.
...
- 39.1k
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 ...
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 ...
- 39
3
votes
Does 2WD mode save me gas over AWD(auto) mode?
It's unlikely that 2WD will save you a lot more fuel than AWD but it will save you more than zero. 2WD will definitely save you fuel over the 4WD Lock setting.
The reality is that, no matter what ...
- 24.3k
3
votes
Accepted
Powertrain vs Drivetrain vs Driveline
Powertrain - From the engine, through the transmission, down the drive shaft and out to the wheels. All parts which make the car go down the road.
Drivetrain - Basically the same as the powertrain, ...
- 153k
2
votes
How to extend the life of the dual mass flywheel in a diesel engine?
Dual Mass Flywheels absorb the harmonic torsional vibration caused by low rpm in few cylinder engines ie 4 cyl at under 1500 rpm, worst under load. That is when the DMF will be working and wearing ...
- 21
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