Thread: D2 drive shaft 13 degees with 50mm lift solution?

It's a load of rubbish and I wouldn't swap the rotoflex out for a uni jointed shaft unless you are breaking them more than normal.

Originally Posted by Slunnie

It's a load of rubbish and I wouldn't swap the rotoflex out for a uni jointed shaft unless you are breaking them more than normal.

D2 front shaft lasted 12,000 kms

Hello Jazzman,

I have a 2" lift on mine. Have done approximately 100K km on the front driveshaft since I refurbished it. Plenty of towing done in that time. Always kept greasing it before long trips during that time and had no issues(they will fail if you don't look after them)
Have you done anything else that would increase the pressure on the driveline besides the 2" lift? 12,000km doesn't sound like enough to make it fail unless there is something else causing greater strain on the driveline. Bigger tyres? Do you drive in a mechanically friendly manner or thrash the thing?
There must be some other cause otherwise every one and their dog with a 2" lift would be putting their suspension back to standard, or be forking out big bucks to replace the DC joint every 12,000km or be driveshaft experts from all the rebuilds they do on their own drive shafts to save money.

Cheers,

Jason

Originally Posted by Jason789

Hello Jazzman,

I have a 2" lift on mine. Have done approximately 100K km on the front driveshaft since I refurbished it. Plenty of towing done in that time. Always kept greasing it before long trips during that time and had no issues(they will fail if you don't look after them)
Have you done anything else that would increase the pressure on the driveline besides the 2" lift? 12,000km doesn't sound like enough to make it fail unless there is something else causing greater strain on the driveline. Bigger tyres? Do you drive in a mechanically friendly manner or thrash the thing?
There must be some other cause otherwise every one and their dog with a 2" lift would be putting their suspension back to standard, or be forking out big bucks to replace the DC joint every 12,000km or be driveshaft experts from all the rebuilds they do on their own drive shafts to save money.

Cheers,

Jason

I thought someone might say this. My front prop shaft made it to the tip of the Cape and Fraser island. It lost a grease nipple between Cains and Fraser. I didn't notice the grease nipple missing until after Fraser. So yes I did leave out a miner detail Fitted a D1 front shaft to get home from the Sunshine Coast.

Yes i have larger tires 265 75 15 on Dynamic steel rims.

Found some angles for single cardan joints / uni joints:

Shaft RPM - Shaft Angle

5000 RPM - 3.25 Degrees
4500 RPM - 3.67 Degrees
4000 RPM - 4.25 Degrees
3500 RPM - 5.00 Degrees
3000 RPM - 5.83 Degrees
2500 RPM - 7.00 Degrees
2000 RPM - 8.67 Degrees
1500 RPM - 11.5 Degrees

Hi Jazzman , quick calculation would be somewhere close to a prop shaft speed of approx 2350 rpm @ 100 k/ph which would allow 7-8 degrees per u/j.
Was it the shaft , splines , or u/js that failed?

Originally Posted by Jazzman

D2 front shaft lasted 12,000 kms

With more lift, bigger tyres and regular heavy 4wding you should get more than that. I found 1310 shafts to significantly increase life (I was getting about 17000km with standard greasable type) and then when Tom Woods started making the Disco2 yolk which allowed a greasable centre bearing I still haven't had one of those fail, and that's running a DC front and rear - spare shafts and parts are still sitting in the cupboard!

Im running a D1 rear shaft in mine and have done so for the last 2 years and many a hard off road trip there no probs