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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 ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
6 votes

Identify that part of my S56 BMW M Coupe

Are you referring to the Driveshaft FlexDisc?
MooseLucifer's user avatar
  • 6,007
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 ...
Fred Wilson's user avatar
  • 11.6k
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 ...
PeteCon's user avatar
  • 8,712
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 ...
Bob Cross's user avatar
  • 24.4k
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.
Moab's user avatar
  • 7,990
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 ...
sntnmjones's user avatar
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 ...
DucatiKiller's user avatar
  • 32.9k
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.
Pᴀᴜʟsᴛᴇʀ2's user avatar
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 ...
race fever's user avatar
  • 3,353
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 ...
Orb's user avatar
  • 5,067
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 ...
Kyle Baker's user avatar
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 ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
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 ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
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 ...
dlu's user avatar
  • 14.5k
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 ...
Bob Cross's user avatar
  • 24.4k
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 ...
Michael John Turner's user avatar
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 ...
Paul Dufresne's user avatar
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 ...
chris's user avatar
  • 39
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, ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
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 ...
Ron's user avatar
  • 21
2 votes

How to extend the life of the dual mass flywheel in a diesel engine?

Dual mass flywheels are susceptible to high energy loads, heavy acceleration and deceleration , towing does not help either, smooth driving and avoid towing where possible , this driving style will ...
Wayne Elliott's user avatar
2 votes

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

It really depends on what your stock gear ratio is. You mentioned you have a 2004 LJ (Wrangler Unlimited), which means it probably came with a 3.73 axle ratio unless you have the Rubicon, in which ...
Paul Dufresne's user avatar
2 votes

1 Piece versus 2 Piece Drive Shaft

Especially in 4x4 vehicles, a two piece Tail shaft is best. Most custom conversions to a one piece suffer when both rear wheels lift off the ground because the tail shaft usually hits the cross ...
Good Vibrations gone bad's user avatar
2 votes

2003 Dodge Durango - Can I take the front drive shaft off and drive the vehicle?

Most 4x4 vehicles (as opposed to all wheel drive) do not have a differential in the transfer case. The Dodge Durango, has a non-differential transfer case, meaning that the front and rear drive shafts ...
Paul Dufresne's user avatar
2 votes

Throw out bearing, input shaft bearing, or drive shaft support bearing?

Sounds like the throwout bearing if you're hearing it mainly when you're operating the clutch pedal. Some vehicles do have an inspection port on the gearboxes bell housing, however in a lot of cases, ...
Aaron Lavers's user avatar
  • 1,596
2 votes

Vibration following replacement of universal joints on drive shaft of rear wheel drive vehicle

It looks like the driveshaft has rotary imbalance Based on the description provided, the source may or may not be the welded tacks. Even if the tacks are symmetrical to one another, if one tack is ...
Zaid's user avatar
  • 39.2k
2 votes

Can driving in drive 2 damage my car

It won't necessarily damage either your engine or transmission. You should realize it will cause more engine/tranny wear due to higher than normal RPM usage. You'll also experience lower fuel mileage.
Pᴀᴜʟsᴛᴇʀ2's user avatar
2 votes
Accepted

Tire and drive shaft revolutions near equal?

When a rear wheel drive car makes 1 tire revolution while driving how many revolutions does your drive shaft make? It depends on the gearing in the differential. If the gear ratio is 3.42:1, the ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
2 votes

Vibration after the car has run for a while

Welcome to the site. If your prop shaft needs balancing, have this done before driving the car any distance. The vibration you are feeling will be coming from either the differential or the gearbox, ...
Steve Matthews's user avatar

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