Thread: 2 interesting things i found out about the p38

Now I am putting on my clairvoyant hat and foreseeing that what Andrew is trying to say is that the crownwheels on the diffs are handed unlike all previous Land Rovers where the front diff is the same as the back diff and just goes backwards.IE the diff is running on the "wrong or back side of the crownwheel".

AFAIK Ashcroft replacement CW&Ps are handed so should be stronger than otherwise when fitted to the front.
I have a rear Quaife in the front of my RRC. ( and yes I have checked with Quaife and it works backwards according to them)
Regards Philip A

Originally Posted by zuk

Hey Andy if the diff is like a slip diff dose that mean you should not use an additive like molycote it will bugger up a wet clutch or normal slip diff.

Molycote M55 stops metal to metal contacted.

The front and rear diffs are std not limited or locking so stick whatever you want oil wise in them. I would stick with the approved 70/90 synthetic gear oil.
The transfer case attached to the gearbox takes Dexron 3, The Viscous swims in this dexron 3 but the business part works with an internal silicone ( i think) substance that allows limited slipage after which it effectively locks up the prop shafts front to back like a central diff lock. Not quite sure what the central diff behind the viscous and within the transfer case does but there is a diff in there. Maybe it turns one prop one way and the 2nd prop the other way allowing axle diffs of the same type to be used.

I have seen both front and rear diffs out of a car the same time and they are identical ( both 4 pin) There is only one part number for front and rear now...
Part # TBB000270
Superceded Product Codes: STC3893 TBB100830 TBB100900 TBB100830 TBB100840 FTC3483 FTC3489 FTC3490 TBB100830 TBB100840 TBB100900 TBF100210 TBB100840

For more info on viscous coupling see........
HowStuffWorks "Viscous Coupling"

Originally Posted by PhilipA

Now I am putting on my clairvoyant hat and foreseeing that what Andrew is trying to say is that the crownwheels on the diffs are handed unlike all previous Land Rovers where the front diff is the same as the back diff and just goes backwards.IE the diff is running on the "wrong or back side of the crownwheel".

Front & rear are interchangeable like 'normal' Land Rovers.

Front & rear are interchangeable like 'normal' Land Rovers.

Then I have NFI what he is referring to.
I know some recent model has "handed diffs"
A 38A has a centre diff also in addition to the VC.

Regards Philip A

Well, as far as I know they're interchangeable .

Originally Posted by PhilipA

Now I am putting on my clairvoyant hat and foreseeing that what Andrew is trying to say is that the crownwheels on the diffs are handed unlike all previous Land Rovers where the front diff is the same as the back diff and just goes backwards.IE the diff is running on the "wrong or back side of the crownwheel".

I shall go and check. I have a pair (F & R) of standard CW&P in the garage. I bought them off Hardy Neale when he put 4.1:1 CW&P kits in his Rangie (now owned by PaulP38A)

at one stage the rear diff was 4 pin while the front diff was 2 pin. With the Thor upgrade 4 pin F&R were introduced. As to 'handed'... BIIK I'm left handed anyway

Originally Posted by p38arover

I shall go and check. I have a pair (F & R) of standard CW&P in the garage. I bought them off Hardy Neale when he put 4.1:1 CW&P kits in his Rangie (now owned by PaulP38A)

a-ha! now I know who to bother if/when I put the Hard Rangie back to stock