Thread: Life of Puma Rear Diff's

Originally Posted by uninformed

Shame they didnt add a nose support bearing like others have....or just build it decent. Funny thing is LR probably dont even make diffs, so if they are going to someone like Dana etc why not chose something good

Pretty difficult to follow their logic. They finally fixed the weakest link in the chain by making the diff 4 pinion, then possibly looked for a way to claw some of that cost back, thus replacing one weakness with another.

Originally Posted by wrinklearthur

Hi Bill

I run a 110 Defender with a Salisbury fitted with maxi drive axles, mainly for the heavy towing that I do.
With the axle housing tubes, I have noticed that in heavy going some have broken those tubes where they enter the diff centre's cast housing.
Is there a proven way to strengthen that weak point?
.

Originally Posted by wagoo

Does your Defender have a Boge load leveller fitted Arthur?
One of the many things that convinced me that LandRover engineers were/are amatures is that they didn't specify an increase in tube wall thickness when the axle was widened 6'' over the previous series 3 dimension. Not only that, but they also fitted a Boge unit over the centre to impose a greater bending load on the assembly.
Having said that, the majority of broken axle tubes I've seen were off Perenties, and they don't have Boge units fitted.
I was talking to Mal Story (Maxidrive) years ago, and he told me that he didn't believe thicker walled axle tubing was the answer, because he reckoned the casting would break. Not sure about that though.
[snip]
Bill.

Apparently the 130 Sals has heavier wall axle tubes than the 110 version.
I think it was Clarkie that mentioned this.

Can't remember offhand, maybe 10mm vs 8mm ?

Originally Posted by rick130

Apparently the 130 Sals has heavier wall axle tubes than the 110 version.
I think it was Clarkie that mentioned this.

Can't remember offhand, maybe 10mm vs 8mm ?

cut yours up and report back...

Originally Posted by rick130

Apparently the 130 Sals has heavier wall axle tubes than the 110 version.
I think it was Clarkie that mentioned this.

Can't remember offhand, maybe 10mm vs 8mm ?

Doubt it was ever as thick as 8mm but don't have one to check anymore.
Bill.

Originally Posted by wagoo

Doubt it was ever as thick as 8mm but don't have one to check anymore.
Bill.

Now you would have had you hands on many more than I, but for some reason I have a feeling that the normal 110 coil Sals is 8mm wall tube

would it be turned down a little at the diff center end to machine it true round?

I have seen it mentioned on the USA sites, with regards to comparing the popular USA diffs (D60-70-80, Ford 9, 14b, Rockwell 106, 205 etc) that while some are physically bigger, others have better gear design, which allows more torque in some applications.....

Id the OEM gear desgin of the P38 type rear better than the OEM Rover type?

Originally Posted by rick130

Apparently the 130 Sals has heavier wall axle tubes than the 110 version.
I think it was Clarkie that mentioned this.

Can't remember offhand, maybe 10mm vs 8mm ?

Series 3 sals has 5.6mm wall tubing (can't see why a 110 would be thicker).

Most US axles are only 6.3 mm wall.

Originally Posted by isuzurover

This is a series sals, but I am 99% sure they are the same.



Flange OD: 131.5 mm
8 mm thick
Tube: 80 mm OD throughout (series and 110)
67 mm ID at flange - but only 5.6 mm wall in middle - maybe tapered?

Disc converted 110 sals. Will take measurements on w-end if different.

Axle Tube Information

Axle Thickness/Size
Dana 30
2.500" x 0.250" wall
Dana 35
2.500" x 0.250" wall
Dana 44 1/2 ton
3.000" x 0.250" wall
GM 10-bolt
3.000" x 0.250" wall
GM 12-bolt
3.000" x 0.250" wall
GM 14-bolt
3.000" x 0.250" wall
Ford 8.8 3.250" x ?.???" wall
Ford 9-inch
3.000" x 0.250" wall
Dana 60 rear
3.125" x 0.313" wall
Dana 44 front 3/4 ton
2.750" x 0.500" wall
Dana 60 front
3.125" x 0.500" wall
Dana 70 rear
3.625" x 0.563" wall
Dana 80 rear





http://4x4help.com/axle/axletube.htm

approx. 6mm and 8mm for the 110 and 130 tubes according to Clarkey and Fred Smith.

http://www.aulro.com/afvb/1032037-post16.html

130 Diffs