Thread: Life of Puma Rear Diff's

Originally Posted by Bush65

I know I can fit a Nissan H233 diff into an early rover housing, so one day will try and grab a p38 housing and see if similar can be done - might be needed if I can't get my 120 rego'd in QLD with my hybrid cruiser axle assemblies that are wider track than rover.

The H233 is more than strong enough for most, and can be had in both low and hi-pinion. I know of the front hi-pinion being used in front and rear of some competition rangies.

I forgot about that John, it needs some 'massaging' of the opening from memory, I have some photos filed of how it looks and that diff is more than strong enough.

what size carrier bearings are used on the H233?, what size are used on the P38/110 rear?

Originally Posted by uninformed

what size carrier bearings are used on the H233?, what size are used on the P38/110 rear?

Who knows ?

I've never seen inside, nothing ever goes wrong with Nissan drivelines

Hi all

The Nissan H233, is that a diff type number or is it a vehicle model ?

Please, excuse my ignorance .
.

Diff type number.
There are several versions of the H233 too, bolt sizes have changed, etc.

They come in high and low pinion and were/are used across a lot of models.
For a high pinion diff, think GQ/GU front diff centre which I think are the H233B.


[edit]
Here's a pic from the pinion end of a front



I'm trying to find the pic of the modified Rover housing to take it.

I believe that the "H" is for Hitachi

The Nissan conversion is likely the optimum solution.Hell even a Suzuki LJ50 diff would be an improvement.
On the other hand, for the relatively small numbers of Puma owners that are likely to want upgrades, surely there are enough RRC/Disco 1 axle and diff housings lying around wrecking yards that can be retrofitted to Pumas/Defenders after being filled with Ashcroft goodies.Even a Series pinion housing of which a few million were produced can be fitted with 3.54:1 ring and pinions, and presumably the Ashcroft upgrades as well.I just don't see the need to make a new casting for the Puma just to spread the pinion bearings further apart when the earlier castings were adequate in that regard.And the carrier bearings are large enough, no need to upgrade sizes there.9'' Ford carrier bearings are no larger.
Bill.

Bill, from what I have been told and where Im coming from, is the physical potential of the housing and casting to have a bigger stronger diff than the Rover type. Im surprised that Ashcroft would use a new casting, unless it is the Force9 which means more of something already in production. The guy that talked to me about the P38, knows diffs and knows Rovers. The best solution for sales and customers is something that just bolts in. But if a really good solution ment an exchange 3rd, with a new carrier, locker, larger-better R+P big carrier bearings and big pinion bearings, all set up and ready to bolt in....maybe that could be a seller