Thread: Rear diff disappointment again

Agreed Pat, but the very first sals retrofit I did was a 2004 Td5 110 that had 2 pinion bearing and crown wheel failures...in 20,000km

JC

Hey

I've fitted to a P38 front diff housing a casing out of a 2009 Defender c/w after market crown wheel and pinion towing a 1.5 tonne camper trailer in the desert in and around town and everthing inbetween with no problems at all.
So i suggest that there may be a problem with the manufacturing of the original gears.

Regards

Peter

Originally Posted by mechanic2you

Hey

I've fitted to a P38 front diff housing a casing out of a 2009 Defender c/w after market crown wheel and pinion towing a 1.5 tonne camper trailer in the desert in and around town and everthing inbetween with no problems at all.
So i suggest that there may be a problem with the manufacturing of the original gears.

Regards

Peter

Very possibly. All the Puma ones seem to be failing due to hardfacing issues and/or poor set up as far as I can tell. The noisy/ broken late Td5 ones I have encountered were just plain wrong from the word go. Period.
Still rubbish diffs though

JC

Originally Posted by wagoo

Ever see a 9'' Ford pinion lying on the ground underneath a vehicle still attached to the propshaft? That's what happened to a mates 265 Hemi powered Landy some years ago. Std 9'' fords have weak brittle grey iron pinion housings, so the pinion will still walk away from the crownwheel, and pegging the crownwheel won't help the situation either. For that you need an optional nodular iron or aftermarket alloy pinion housing.
Wagoo.

Never said they were good, tear the nose out as you mention, tear carriers in half, all sorts of issues, just the aftermarket is so well catered for

The 9 inch in standard form is very overrated. Plenty of pinion support but thats about it.

Dana 60 / LR sals are way more durable.

JC

So if I go to the dealer and put cash down on a new 2011 Puma, I'm just about guaranteed to go through multiple diffs?

Originally Posted by wrinklearthur

The Pumas are capable of delivering more torque with the more powerful motor and lower gearing.

Cheers Arthur

I don't really think that is a valid factor as there are plenty of Td5's that are just as or more powerful (having been chipped etc.) than a standard Puma and are not having diff problems. Also, I know of numerous Puma's that arn't driven hard but are still experiencing diff problems.

I would still love to know what the difference is though. Maybe, as Lou suggested above, it is just a quality control issue.
JC is also suggesting lack of quality control (crown wheel/pinion etc) and/or materials.

It seems that with a very very marginal design to start with, if everything else is not spot on then you are assured of trouble.

Originally Posted by Xtreme

I don't really think that is a valid factor as there are plenty of Td5's that are just as or more powerful (having been chipped etc.) than a standard Puma and are not having diff problems. Also, I know of numerous Puma's that arn't driven hard but are still experiencing diff problems.

I would still love to know what the difference is though. Maybe, as Lou suggested above, it is just a quality control issue.
JC is also suggesting lack of quality control (crown wheel/pinion etc) and/or materials.

It seems that with a very very marginal design to start with, if everything else is not spot on then you are assured of trouble.

Oil !
Is there a difference in the oil that was first installed in these models?
What are the recommended types of lubricants to use in the differentials of the TD5 and the Puma's.
If oil can be ruled out, it does look like a quality issue.

Cheers Arthur