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Good or bad driveshaft?

petak

Enthusiast
Messages
1,404
Location
Vodice, Croatia
#1
Here is another technical one for you guys.

Is it possible to recognize good from bad driveshaft when you take cv joint boots of?

I have 4 used driveshafts. All of them are with broken cv boots. I do not know their condition before taken of the car.

How can i choose best one?

I can take pictures of cv joints from inside if that would make any difference

Thank you for reading
 

benchseat

Enthusiast
Messages
279
#2
In my experience driveshafts only reveal themselves as "bad" when the are actually installed, and start knocking when going round sharp corners. If a shaft is bad it will reveal itself when on the "inside" of a corner. Visually there seems to be nothing to see until the shaft actually disintegrates!

It takes some time between when the knocking first starts and when the shaft finally fails, so I should not worry about getting stuck. If you replace the CV boot, install the shaft and then it doesn’t knock on cornering, you’re OK.
 

mr-reno-139

AKA Paul Cunningham
Messages
2,048
Location
lancing west sussex england
#4
You can feel the difference once you know you know
inner end is usually ok though
Studying wheel end now
If it is notchy going from one direction to full movement bin it
Also if you lock a pair of mine grips on middle of shaft with car jacked up hold grips and check for noise on joint by rotating rocking tyre back and forth thete will always be some slight free play

9ff the car one pair on splines at outer end and another on centre shaft will also reveal movement and noise
Some shafts were repaired by metal spraying old shafts and re machining also new shaft quality can vary so new may not last longer than a good Second hand genuine shaft
 

petak

Enthusiast
Messages
1,404
Location
Vodice, Croatia
#5
Here is situation with driveshafts.
Two out of 4 i have striped to smallest part possible.

From one i have used cross for driveshaft that is on my car now as i find out that cross on it was also fell apart.
Second one have same problem. cross is in peaces.

Here are peaces from one driveshaft

IMG_20200201_203245.jpg

At gearbox side one retaining ring was broken and needle bearing felt apart so i dismantle all of them
IMG_20200201_200642.jpg
IMG_20200201_200248.jpg

On wheel side I have taken of security spider inside the hub.
IMG_20200201_211434.jpg

That supposed to stay like this
IMG_20200201_195714.jpg

But with this balls and shafts in between
IMG_20200201_195658.jpg
And now i am in trouble to putt it back in place.
If anyone have idea how to put it back i am listening.

On second driveshaft i did not dismantle wheel side. Just cleaned from grease.

When i try to twist this hub around driveshaft (left-right, torsional move) i can feel some play but can't tell is that play to much or just right.

IMG_20200201_200931.jpg
IMG_20200201_200925.jpg

To me all is looking alright but again this is first driveshaft that i am holding in hands and trying to recognize if it is good.


I agree with you MR-reno-139...once you feel good driveshaft then you know what you need to feel.

Idea is to degrease other two driveshafts and try to compare and notice difference
 

mr-reno-139

AKA Paul Cunningham
Messages
2,048
Location
lancing west sussex england
#6
If you have stripped the wheel end. As far down to inspect if you look closely halfway down. The 3 slotted grooves Close inspection. Will let you see. See a small Mark if you can feel this. With your finger. Easily then the shaft will be noisy when you. Reassemble it.
2 To get the outer end back together. Is quite tricky? Pretty sure the workshop manual mentions. Making a tool to pull the clip back into place. I've never used that. That method and I did have a video. Which I made. To demonstrate but don't seem to be able to find it now. Basically if you clamp the short wheel end part into a heavy vice protecting the spline with aluminium You need to position the clip. Centrally and then then push the drive shaft. Hard down against. The spring button And move the drive shaft. A crossed to full lock position 3 times To engage the clips. Do not attempt to Grease the joint until it is reassembled. As you will not be able to see what's going on. On
 

petak

Enthusiast
Messages
1,404
Location
Vodice, Croatia
#7
Thank you mr-reno-139....will try to see if manual is saying something....but i understand what you are saying and will try to do it.
 

mr-reno-139

AKA Paul Cunningham
Messages
2,048
Location
lancing west sussex england
#8
Again I have done hundreds over the years
Acquired skill you need to press really hard and then swing shaft across in a wide arc into each of the 3 positions to correspond with clip location
 

petak

Enthusiast
Messages
1,404
Location
Vodice, Croatia
#9
I think i have find out how good driveshaft supposed to feel.
Zero play at wheel hub when you twist hub and shaft.

My driveshaft no3 is like that.

So instantly i know that driveshaft no2 is no good as it has play.

There is still driveshaft no4 to clean and test.

Mr-reno-139.....i almost manage to clip security spider onto shaft the way you described. But just almost.... Must try some more.
 

petak

Enthusiast
Messages
1,404
Location
Vodice, Croatia
#12
Cv boot put on driveshaft
IMG_20200211_191223.jpg

Repairing needle bearing on cross.
Game of nerves, patience and steady hands.

Needles
IMG_20200211_184423.jpg

Ball in place
IMG_20200211_184541.jpg

ring
IMG_20200211_184559.jpg

And security circlip.
Tricky part to put in place.
IMG_20200211_185347.jpg


Now it is time to put all together.

First goes boot and then cross on shaft.
IMG_20200211_191534.jpg

Be carefull how you put cross on shaft. Side that goes First on shaft has small tapper.
IMG_20200211_192406.jpg

IMG_20200211_192355.jpg

Circlip at the top of shaft
IMG_20200211_192543.jpg
 

mr-reno-139

AKA Paul Cunningham
Messages
2,048
Location
lancing west sussex england
#14
1,how did you get outer end back together
2 if you use grease on needle rollers and then use tiny plastic cable tie to hold in place you pull tie tight and then steel ring will go over easily cut tie afterwards
3 well done
 

petak

Enthusiast
Messages
1,404
Location
Vodice, Croatia
#15
Mr-reno-139

Thank you.

I did not managed to put it back. This is driveshaft no 3.
Still have driveshaft no4. to work on.

I did something simmilar. Greased surface and sricked needles. And then gently put ball ring on it.
Got another tip to use sewing thread to secure needles to place
 
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