p38 diff in disco axle case.

[herdwick.]

does anyone know if it's possible to fit a p38 4 pin diff into a disco 1 axle case? it's a good upgrade from the standard sick 2 pin diff.

[Slunnie]

It wont fit.

[herdwick.]

$h/t! i've been told so but wanted a second opinion.

[Bush65]

Although they are 4 pinion diff, they are still a weak diff.

You will be better off with a locker or tru-trac to overcome the 2 pinion weakness.

Better still for stronger ring an pinion, and stronger axles, etc. do a toy diff conversion into your disco housing.

[Slunnie]

If you are bent on making the P38 diff fit, you will need to open up the big hole in the housing a little but all the way around - about 2mm as a guess. I think the bolt pattern was the same from what I recall. You will also need to grind open the slot so the crown wheel will pass through. That IIRC is about a 5mm grind to the inside side of the slot.

[orrangebuggy]

the diff centre will fit i used them in my off road racer in the UK ! give crown differentials a email they are in Nottingham in the uk and they will be able to help you out im pretrty sure

[herdwick.]

thnx for the replies guys,i contacted ashcroft transmissions to get a price for the factory 4pin diff and at 545 sterlings is not much cheaper than a quaife atb centre diff at 575 sterlings a well proven brand!!
but on the other hand you can get a tracktech (detroit)tru-trac diff plus a 4.11 ring&pinion at 535 sterlings.

where would you choose to invest your money?

daf.

[orrangebuggy]

just get ARB air lockers they are the ducks nuts !!! in and out at the press of a button

[herdwick.]

DON'T LIKE AIR LOCKERS!!! call me idiot but i need something that can work without any attention

[Slunnie]

Of your selection I would expect the Quaife to be the best of them. It has greater biasing than the TT.

[ISUZUROVER]

DON'T LIKE AIR LOCKERS!!! call me idiot but i need something that can work without any attention

Then what about a detroit rear and TT or quaife front???

[Bush65]

thnx for the replies guys,i contacted ashcroft transmissions to get a price for the factory 4pin diff and at 545 sterlings is not much cheaper than a quaife atb centre diff at 575 sterlings a well proven brand!!
but on the other hand you can get a tracktech (detroit)tru-trac diff plus a 4.11 ring&pinion at 535 sterlings.

where would you choose to invest your money?

daf.

Factory 4 pin and P38 would be last choice as they do nothing for traction and only overcome the 2 pinion weakness.

Tru-trac and Quaife are similar, with the Quaife having better biasing. Both overcome the main weakness in the stock diff. If you have traction control, either will be a very good choice.

If you upgrade the axles and cv's the ring and pinion then become the weak link in the drive train.

[Yorker]

What is the Quaife biasing vs. the Truetrac's? Does Quaife ruun a different ratio F vs R ?