Double cardan driveshaft help

[ARB777]

how did you go with getting this sorted out @ARB777 ?

Got one from tatton instead. No issues to this date.

 

[mudgudgeon]

The DC joint in the Landtank rear shaft does use what appears to be the same size joint as the 80 front. The rear joint is the 80 size joint. I was under the impression that this shaft would be all 80 sized joints but perhaps that’s not possible. I do know that Toyota shafts are notoriously strong and I don’t think I need to be concerned about the smaller joints in the DC.

A little toyota trivia FWIW,
105series landcruisers use the same size uni joint on front and rear drive shafts.
They are the size of the 80 series front shaft uni joints.

Toyota downsized the rear uni joints, and the rear shaft tubing diameter for the 105 series which are quite a bit heavier than the 80 series.

 

[landtank]

Concerning the DC joints, there are 2 styles that Toyota used. The inside clip and the outside clip.

The inside clip has substantially larger joints both in diameter and length.

As of late Toyota uses a crimp style tube with the smaller outside clip DC joint.

All my shafts use the larger inside clip style.

 

[baldilocks]

A little toyota trivia FWIW,
105series landcruisers use the same size uni joint on front and rear drive shafts.
They are the size of the 80 series front shaft uni joints.

Toyota downsized the rear uni joints, and the rear shaft tubing diameter for the 105 series which are quite a bit heavier than the 80 series.

I understand that the rear universal joints of the 105 are the same size as the fronts. But then you said they down sized the rears on the 105 series which are heavier than the 80 series. You mean to say that once upon a time the rears of a 105 were heavier duty than an 80 or they are heavier duty after down sizing? What I know is that the rear universal joints of an 80 series are considerably larger than the fronts. In fact, the diameter of the bearing caps is 1/10th of an inch larger than Spicer 1350. That is respectable and probably overkill for an 80 series and why the joints last so long if properly maintained.

 

[Shipwreck]

I understand that the rear universal joints of the 105 are the same size as the fronts. But then you said they down sized the rears on the 105 series which are heavier than the 80 series. You mean to say that once upon a time the rears of a 105 were heavier duty than an 80 or they are heavier duty after down sizing? What I know is that the rear universal joints of an 80 series are considerably larger than the fronts. In fact, the diameter of the bearing caps is 1/10th of an inch larger than Spicer 1350. That is respectable and probably overkill for an 80 series and why the joints last so long if properly maintained.

I think that what @mudgudgeon is saying is that a 105 series truck is heavier than an 80 series truck.
His point is that even with the extra weight, Toyota felt it was sufficient to run the smaller u-joints in the rear shaft.

 

[mudgudgeon]

What I know is that the rear universal joints of an 80 series are considerably larger than the fronts

Correct. 105series uses the same size as 80 series front shaft for all the uni joints.

I think that what @mudgudgeon is saying is that a 105 series truck is heavier than an 80 series truck.
His point is that even with the extra weight, Toyota felt it was sufficient to run the smaller u-joints in the rear shaft.

Correct

Oddly enough, the rear diff centre and rear axle shafts were both beefed up in the 105 & 79 series.

Hard to know sometimes if Toyota is shaving things down due to bean counting, or just rationalising parts used across different models

 

[Broski]

Happy that used the bigger ones on the 80
My rear shaft went 275k miles before the slip joint started showing wear.
The u- joint appeared to be originals. I still use that drive shaft as my beater on trails like the Rubicon and Fordyce