PUMA - Drivetrain Upgrade

Just another comment about the rear differential in the Puma (And 2003 on Defender) I believe they are way too light duty in the crownwheel and pinion area, With flexing of the thinner crownwheel under loads, and poor initial pinion preload (read excessive) from new was a problem with some. I think ANY drivetrain upgrade to these models can't be complete without changing out the rear diff for a salisbury Item. Even a Trutrac or ARB in a Rover Banjo diff (Like the earlier 90 has in the back) with upgraded axles will be a step forward from the P38a design IMO.

JC

Drover

When you are running the Achcroft flanges, can you still fit the Boost Alloys over the top, or do you have to run steel rims?

Frank

Hi guys,

is the consensus oil over grease to lube the wheel bearings.

Drover, is the oil seal you have pictured for the front diff the same for the rear? And where did you get it?

just had me a rush of blood at Ashcroft as well.

Quote:

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Originally Posted by MTB

Drover

When you are running the Achcroft flanges, can you still fit the Boost Alloys over the top, or do you have to run steel rims?

Frank

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Hey Frank,

I am just using the stock SVX alloys, not certain but I reckon that they would be the same as the standard alloys for the PUMA.

Looking at the Ashcroft Flanges, compared to the stockies, I don’t think that would stick out any further. Basically they are not much bigger, rather more solid.

All of the cast recesses have been removed and are machined from a single piece of alloy steel. The thickness is about the same as the bolts holes on the LR units

Cheers
Grant

Drover

I am going to follow suit and install some Ashcroft shafts, flanges and CV's in the next couple of weeks (need to find a 52mm socket first).
What is the story with grease when I put it all back together.
The new CV's seem to be nicely creased up, but do I need to add some more of this stuff ( Ashcroft Transmissions - CV Joint Grease ) into the swivel housing or what?
I am a little lost here.

thanks
Frank

Quote:

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Originally Posted by TwoUp

Looks good Drover,
Any chance of placing one of the old shafts next to a new one for comparison photo?

Are they doing a front locker as yet?

Regards,
PeterW

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Hi Peter, I just had rear HD axles installed and took a photo of standard and HD next to each other and apart from the colour and the splines being a bit longer there is no other discernible difference. Diameter is the same (as you would expect) otherwise they wouldn't fit in the diff.
My mechanic (landy specialist) removed the old oil seals that separated the diff oil from the greased bearings so that with the new axles and flanges the bearings would be oiled, rather that greased. Apparently extends the life greatly.
cheers Gerald

Quote:

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Originally Posted by TwoUp

Looks good Drover,
Any chance of placing one of the old shafts next to a new one for comparison photo?

Are they doing a front locker as yet?

Regards,
PeterW

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Hi Peter, I just had HD axles installed and took a photo of standard and new and apart from the colour and the splines being a bit longer there is no other discernible difference. Diameter is the same (as you would expect) otherwise they wouldn't fit in the diff
cheers Gerald

Quote:

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Originally Posted by TwoUp

Looks good Drover,
Any chance of placing one of the old shafts next to a new one for comparison photo?

Are they doing a front locker as yet?

Regards,
PeterW

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Hi Peter, I just had HD axles installed and took a photo of standard and new and apart from the colour and the splines being a bit longer there is no other discernible difference. Diameter is the same (as you would expect) otherwise they wouldn't fit in the diff.
Mt land specialist mechanic also pulled out the old oil seals that separate the diff oil from the greased bearings on the standard axles so that the bearings would be oil lubricated; results I have heard is that the bearings will last a lot longer

cheers Gerald

Quote:

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Originally Posted by Didge

Hi Peter, I just had HD axles installed and took a photo of standard and new and apart from the colour and the splines being a bit longer there is no other discernible difference. Diameter is the same (as you would expect) otherwise they wouldn't fit in the diff.
Mt land specialist mechanic also pulled out the old oil seals that separate the diff oil from the greased bearings on the standard axles so that the bearings would be oil lubricated; results I have heard is that the bearings will last a lot longer

cheers Gerald

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I hope he replaced the grease seals in the hubs with double lipped oil seals at the same time.