Jump to content

Found out why my diff wasn't working :D


Scooby Jim
 Share

Recommended Posts

Erm "Mr Scobby"

I THINK your somewhere near me ?

I have a few 4.7s kicking about that are of next to no use to me ok their not great condition, but not hanging either :lol:

For a forum Donation of £20, I can give you another unit, all the adverts disappear, AND you get a diff :D

Let me know, I'm Haslemere West Sussex / Surrey Borders

Nige

Link to comment
Share on other sites

I Can :rofl:

Yes thats an Imperial Diff, (BIG bolt heads on the carrier) so its highly likley to be a 4.7 Series unit :P

God I am so sad, and I DO need to get out more :blink:

Wibble

Nige

Erm "Mr Scobby"

I THINK your somewhere near me ?

I have a few 4.7s kicking about that are of next to no use to me ok their not great condition, but not hanging either :lol:

For a forum Donation of £20, I can give you another unit, all the adverts disappear, AND you get a diff :D

Let me know, I'm Haslemere West Sussex / Surrey Borders

Nige

I'm based in Swansea South Wales, and thanks for the offer but I'm in the process of sorting some Disco diffs, for the old girl.

Link to comment
Share on other sites

3.54 ? vs 4.7 ?

Nige

= 4.7:1

Nige :D

Well thats that then!! lol.

BUT it does look like it was reconditioned, and then the planetary gears, came loose and Robert's your mothers brother it jammed up.

Put it this way, its in better condition than my Impreza diff I have as a spare, and that is only 10.

Link to comment
Share on other sites

It has certainly been messed with as the tufnol washer with the oil holes in it(l/h side of pic 1) is a sun wheel shim/thrust washer for an early diff of the S1, 2 & early 2a flavour which had a bolt on pinion oil seal retainer, Once the oil seal retainer was made integral with the case there were no shim washers used on the sun wheels. Also the crownwheel bolts are 3/8" BSF rather than the later 3/8"UNF.

Link to comment
Share on other sites

It has certainly been messed with as the tufnol washer with the oil holes in it(l/h side of pic 1) is a sun wheel shim/thrust washer for an early diff of the S1, 2 & early 2a flavour which had a bolt on pinion oil seal retainer, Once the oil seal retainer was made integral with the case there were no shim washers used on the sun wheels. Also the crownwheel bolts are 3/8" BSF rather than the later 3/8"UNF.

God knows, I know nothing as to the history of this vehicle so at the moment nothing surprises me.

That crown wheel and pinion are not standard LR 4.7- they are early KAM gears, the crown wheel is far too thick for standard and the colour is very recognisable too :-) Steve

Well they knackered KAM gears now, what was/is special about the KAM gears??

Link to comment
Share on other sites

That crown wheel and pinion are not standard LR 4.7- they are early KAM gears, the crown wheel is far too thick for standard and the colour is very recognisable too :-) Steve

Not that it matters any more in this instance,but If the crownwheel was thicker, wouldn't that mean that it would then have to be fitted to a 3.54:1 crownwheel carrier? Otherwise there might not be sufficient space to adjust backlash?

And Phil Hancock. Wouldn't all series 4.7:1 ratio diffs have been messed with by now? They were considered 'consumables' back then, just like petrol,oil, fan belts, radiator hoses and tyres.

Link to comment
Share on other sites

The diff in my 109 hadn't been messed with other than a new pinion seal, and I don't think our Lightweight diffs had been fiddled with either.

It's a good point about the diff carrier perhaps being a 3.54 unit to accommodate the KAM gear and shim. If that is the case, and it has a filler plug on the carrier, than that will solve Jim's problem with oil levels on his 3.54 swap (other thread) - he could swap the 3.54 internals from one of the new diffs to this carrier, giving him the new diff ratio he wants and a filler plug.

Link to comment
Share on other sites

Definately scrap im afraid.

Thought so.

Tongue in cheek, right? :o

Yeah.

Not that it matters any more in this instance,but If the crownwheel was thicker, wouldn't that mean that it would then have to be fitted to a 3.54:1 crownwheel carrier? Otherwise there might not be sufficient space to adjust backlash?

And Phil Hancock. Wouldn't all series 4.7:1 ratio diffs have been messed with by now? They were considered 'consumables' back then, just like petrol,oil, fan belts, radiator hoses and tyres.

The diff in my 109 hadn't been messed with other than a new pinion seal, and I don't think our Lightweight diffs had been fiddled with either.

It's a good point about the diff carrier perhaps being a 3.54 unit to accommodate the KAM gear and shim. If that is the case, and it has a filler plug on the carrier, than that will solve Jim's problem with oil levels on his 3.54 swap (other thread) - he could swap the 3.54 internals from one of the new diffs to this carrier, giving him the new diff ratio he wants and a filler plug.

Thats exactly how the penny dropped in my head too, but will compare like for like when I get the 3.54 diffs.

Link to comment
Share on other sites

No, the earlier KAM gears were designed to fit in to series casings and on series carriers and had to use a 3.9mm spacer when fitted to metric 3.54 carriers. The tooth cough should be 10 on the pinion and 47 on the Ring gear which gives you 4.75:1 ratio - close enough to get away with when combined with a 4.7:1 ratio in the opposing axle without causing wind-up.

Link to comment
Share on other sites

Sorry that should say tooth count not cough, chuffing iPhone. Also to add that is definitely an imperial casing you have there. Whether the carrier is 3.54 or 4.7 should become obvious when you unbolt it all.

Cheers for the reply, IF they went to the expense of a KAM diff would they have uprated to KAMs halfshafts too?? Is there any way to check?? As they do look different metal to the standard front shafts I have.

Sorry for appearing thick, but its my first ever Land Rover so I have no benchmark as to what's right or not.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...

Important Information

We use cookies to ensure you get the best experience. By using our website you agree to our Cookie Policy