Puma Diff rebuild

Printable View

Show 40 post(s) from this thread on one page

29th September 2016, 01:50 PM
DazzaTD5

Quote:

Originally Posted by 4wheeler

I'm having a Harrop e-locker fitted to the rear differential today. I received a phone call saying the pinion bearings were shot and needed replacing. The diff has done only 28,000Km. That's just sad. I had no indication of any problem as the thing ran silently - the diff, not the rest of the boom box.

The local dealers had none in stock and was advised of a 2 week wait. Fortunately a dealer put me on to Ritters Automotive here in Melbourne who had them in stock. I hope to get the Defender back by this evening, hopefully running well.

I wonder what the front diff is like?

Its common, drain the diff fluid at 30K on a Defender TDCi (puma) and the oil will be black.

If they are fitting a diff lock, e-locker etc then its normal to allow for new bearings during the install, both pinion and carrier.

2 weeks wait for a bearing, how ridiculous...
Any Timken bearing dealing will have both the pinion and carrier bearings in stock.

Regards
Daz
29th September 2016, 04:41 PM
justinc

Quote:

Originally Posted by Marty90

what about diff pegging?

On a 20,000km old vehicle?? Shouldn't be necessary. My sals now has some serious km on it as it has been in 3 vehicles now, 2 of them mine, and haven't replaced a bearing yet.

Jc
29th September 2016, 06:22 PM
1nando

Put a e locker in it, hd axels and flanges all round and its good to go .
The P38 is a setup issue, once sorted you should not have any issues with it.
I learnt a lot of this after having 3 rear diffs. Get it rebuilt properly and forget the need to worry about it.

Sent from my SM-G925I using AULRO mobile app
29th September 2016, 06:32 PM
justinc

Still rubbish design. Nothing can fix that. But hey we've been here before...😕

Jc
29th September 2016, 07:01 PM
1nando

[QUOTE=justinc;2592699]Still rubbish design. Nothing can fix that. But hey we've been here before...😕

I think once setup correctly its a good diff, the bowler vehicles run 170-180hp with 470-500nm of torque and do not have any issues......

Sent from my SM-G925I using AULRO mobile app
29th September 2016, 07:10 PM
4wheeler

Quote:

Originally Posted by DazzaTD5

Its common, drain the diff fluid at 30K on a Defender TDCi (puma) and the oil will be black.

If they are fitting a diff lock, e-locker etc then its normal to allow for new bearings during the install, both pinion and carrier.

2 weeks wait for a bearing, how ridiculous...
Any Timken bearing dealing will have both the pinion and carrier bearings in stock.

Regards
Daz

Thanks Daz.
The new bearings were Timken so now have new carrier and pinion bearings. Will check the oil regularly to see how it goes.

E-Locker install by Harrop was first class. Great to deal with and they followed a long list of my requests to the letter. I did the switch install using a Mulgo sourced diff lock switch so looks factory and no dash holes. No compressor or airlines to worry about. Now to try it out.
30th September 2016, 08:34 AM
POD

Quote:

Originally Posted by Marty90

what about diff pegging?

Pegging provides support to the crownwheel to prevent it flexing away from the pinion under extreme loads. The short pinion that Justin has brought up is a different problem.

The Ashcroft locker is a far better choice than the ARB. The ARB locker for this model has a design flaw that causes failures.
30th September 2016, 09:44 AM
DazzaTD5

Regardless of what gets done to the P38 diff (the rear diff used in late model Defender TD5 and all TDCi (puma)) it isnt going to be as robust as the Salisbury rear diff it replaced.

The Salisbury is a Dana 60 just without the Dana 60 original axles, they are a known reliable just about bullet proof diff.

I just can't justify the cost nor can most customers in changing a rear end of a Defender over to a Salisbury diff, but if you want bullet proof then its the way to go.

Regards
Daz

P.S the Harrop E-Locker are a great bit of kit and have fitted to many Jeeps over the years
30th September 2016, 01:20 PM
justinc

Quote:

Originally Posted by DazzaTD5

Regardless of what gets done to the P38 diff (the rear diff used in late model Defender TD5 and all TDCi (puma)) it isnt going to be as robust as the Salisbury rear diff it replaced.

The Salisbury is a Dana 60 just without the Dana 60 original axles, they are a known reliable just about bullet proof diff.

I just can't justify the cost nor can most customers in changing a rear end of a Defender over to a Salisbury diff, but if you want bullet proof then its the way to go.

Regards
Daz

P.S the Harrop E-Locker are a great bit of kit and have fitted to many Jeeps over the years

I'm in the opposite camp Daz, I have a hard time justifyingthe cost of rebuilding and locking a p38 diff that will fail again in the future. Especially for big tyred, loaded, touring and working defenders. My latest 'upgrade' is retubing the big uni frint tailshafts to fit the rear of defenders, especially 130s. The national parks one we work on here spends its time heavily loaded with a fire fightingunit etc and had alreadyspread a rear shaft yoke...😮
30th September 2016, 09:58 PM
DazzaTD5

Quote:

Originally Posted by justinc

I'm in the opposite camp Daz, I have a hard time justifyingthe cost of rebuilding and locking a p38 diff that will fail again in the future. Especially for big tyred, loaded, touring and working defenders. My latest 'upgrade' is retubing the big uni frint tailshafts to fit the rear of defenders, especially 130s. The national parks one we work on here spends its time heavily loaded with a fire fightingunit etc and had alreadyspread a rear shaft yoke...😮

Not really, lets face it the average Defender TDCi (puma) owner isnt going to go down the path of lockers, there are far more "new" Land Rover owners driving Defender (TDCi, puma) models than any other Defender in the past so the P38 diff is going to last, with regular oil changes it will be fine. Compare the Defender rear diff to other wishy washy diffs like in the Discovery 3 or early Jeep Dana 30's and again its looking ok.

Yes if your looking at as you say the lockers, big tyres etc etc then the Salisbury is going to be the go.

Your looking at it wrong...
Your perspective is from a Land Rover powered Isuzu 110 owner where you are expecting it to all be ok for about 50 years :p :p :p

As for your sig...
"The Isuzu 110. Solid and as dependable as a rock" <=== thats because its as technically advanced and a similar age to a rock :) :) :)

thats not having a go by the way, I'm looking for one myself, as between D3, D4 repairs not to mention Jeeps I simply dont have time to work on my own vehicle :p

Regards
Daz

Show 40 post(s) from this thread on one page