7 votes
Accepted

CV Axle vs drive axle, vs cv shaft, vs drive shaft

What is a CV Axle? CV stands for Constant Velocity. It's a type of axle which is used on front wheeled drive vehicles which allows power to still be transmitted to the front tires even while wheel is ...
6 votes
Accepted

Car with broken left driveshaft won't stay in park

While the other answer is basically correct, it really doesn't tell you why it does this. These two things are related because of the differential. The differential is made to allow either side to ...
4 votes
Accepted

Coilovers destroying my drive shafts

What I'm going to say applies to both drive shafts on an independent rear suspension (IRS) or with a drive shaft going from the transmission to the differential. There are several different things you ...
4 votes
Accepted

Should I be concerned about these cracks on the giubo?

Absolutely. Remember what I wrote about stress risers. It doesn't matter if it's metal or rubber, the stress riser will behave the same. This is the beginning stages of wearing out. It won't be long, ...
3 votes
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Is this an appropriate amount of "sliding yoke" visible on an 86 Dodge B250 / A727 Torqueflite transmission?

It looks like it's a bit too far out, however, let me pose a couple of questions: Are there any modifications to the truck? (ie: is it lifted) Does the driveshaft move at all in the up/down or left ...
3 votes

Car with broken left driveshaft won't stay in park

Yes it is related, both drive shafts (cv shafts) must be connected and in working order for park to work, use the e brake like you have been. Replace the cv shaft and all will be working again.
  • 7,960
3 votes

Hi I have a 1982 Honda magna motorcycle my rear wheel locked up while i was ridding

Something loose in gearbox that has allowed two pairs of gears to engage at the same time locking the box. Or something jamming the output shaft. Separate the output shaft from the gearbox and see if ...
  • 34.4k
2 votes

What would cause a drive shaft to snap in half?

All we can do it guess. IMO, though not easy to see, it appears the slip joint is corroded. If the joint is not able to slide in and out as the suspension travels up and down, then it will put undue ...
  • 9,035
2 votes
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Torquing pinion nut on pinion shaft—can it be done with tires on ground?

If you have enough clearance to fit under the Wrangler, there's no mechanical reason you cannot do this while the vehicle is on the ground. Torquing the pinion nut with it on the ground will not cause ...
2 votes

What is the Purpose of a drive shaft tube

The purpose of a drive shaft is to transmit power from the transmission (or transfer case) to the differential. This is their main and only purpose. A drive shaft can be made from any material which ...
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 ...
2 votes

CV Axle vs drive axle, vs cv shaft, vs drive shaft

Great answers from Paulster. I would add: Prop shaft: probably short for propeller shaft (which is the drive shaft that runs the drive or torque all the way from the transmission to the rear axle ...
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, ...
2 votes
Accepted

Removing a welded nut

My suggestion is to take a Dremel tool or a angle grinder and clean out the weld, then you'll be able to back the nut off. The threads are already buggered from the welding which they were accosted ...
1 vote

Drive system play in a RWD vehicle

What you are describing as "play" is called "backlash" and is a characteristic of most gear drive systems. In the case of a differential, there is a specific procedure for ...
  • 10.1k
1 vote

Front-to-back vs left-to-right driveshaft

It's an interesting idea. Some potential advantages I could see: You could get away with only one differential. On loose ground, the front/back difference isn't much of an issue, and on tarmac you ...
1 vote
Accepted

Can a greasable U-Joint showing stiffness be "saved" by greasing

In a word: NO By the time there is looseness or roughness the damage is already done. The only thing left is eventual failure of the joint. As long as you are prepared to deal with that happening at ...
  • 10.1k
1 vote

Can a greasable U-Joint showing stiffness be "saved" by greasing

My 4x4 had 4 of those uj's and I used to grease them weekly and always after they were immersed in water. They lasted a lot longer than if I practiced "fit & Forget"... However, I was ...
  • 34.4k
1 vote
Accepted

I need a sparepart, but how is it called?

As discussed in the comments, this is the inner CV joint. Make sure you get a rubber gaiter and grease with the new one. You will likely need to re-use the bolts.
1 vote

Knocking sound from under car when going slow, what are the likely causes?

Your issue is probably connected with driveline. I will assume that it is rwd/4wd car as you are suspecting driveshaft problems. To diagnose whether it is driveshaft related problem, drive slowly ...
1 vote

6061 ALUMINUM TUBE (Round)

I'm not sure what manufacturers use for their mass produced aluminum drivelines (though they may use it), but aftermarket driveline manufacturers such as Denny's use 6061-T6 tubing to create their ...
1 vote
Accepted

Could this be a Bad CV shaft or boot?

If this sound is a heavier and regular knocking type sound as you're moving forwards or backwards whilst applying a little throttle on full steering lock, it indicates a failing CV joint.
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1 vote
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FWD open diff car with one failed CV joint. Would this get me home?

If you safely "lock" the broken driveshaft, then the other front wheel will rotate if you put it in gear, note this will be at 2 times the speed... I did this to drive a saw bench from a rear axle ...
  • 34.4k
1 vote

What would cause a drive shaft to snap in half?

Usually drive shaft issues can be attributed to aftermarket engine modifications (more torque) or tires (more traction, and thus a higher peak torque through the shaft). In both those cases slight ...
  • 1,723
1 vote

What would cause a drive shaft to snap in half?

I have only once seen a drive shaft snap. The cause was traced to a faulty batch of steel. The shaft had inclusions within the steel which reduced its strength. Once found, the company issued a ...
  • 1,423
1 vote
Accepted

volvo c30 DMF or driveshaft bearing?

Sounds like a driveshaft joint or support bearing. If it failed completely and hit other things as you moved it then you will need to check brake lines, suspension components and any abs / brake wear ...
  • 34.4k
1 vote

minivan with 48000 miles needed front driveshaft replaced?

It is a bit odd based on the mileage (in my experience they typically last 100k miles at minimum) but it's certainly possible that it was damaged instead of going bad. The boot could have been torn by ...
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