Thread: Rear diff disappointment again

So where does the P38a diff as fitted to the Td5 110 from 2003 to 2007 fit into all this?
IIRC they didn't/don't (touch wood) seem to suffer the same troubles as the P38a's fitted to the Puma's.

manufacture of the p38 diff was moved to a diffferent area and I believe its the quality control that has let the puma rear diff down....

Originally Posted by dullbird

manufacture of the p38 diff was moved to a diffferent area and I believe its the quality control that has let the puma rear diff down....

Ummmmm maybe .................. but according to post #5 (and following) by Dave Ashcroft, it sounded more like a design fault which I thought would have been common to both Td5 & Puma.

Must go and search for your trip report and pics from yesterday, hope you had a good day.

Will the earlier longer pinion shaft Rover type diffs fit into a Puma banjo housing? If so it seems that Daves/Ians new crownwheel and pinion in an earlier pinion housing would be sufficient for many owners here.
Wagoo.

Originally Posted by wagoo

Will the earlier longer pinion shaft Rover type diffs fit into a Puma banjo housing? If so it seems that Daves/Ians new crownwheel and pinion in an earlier pinion housing would be sufficient for many owners here.
Wagoo.

Not really, quite a bit of PCD and clearance problem, also quite different axle lengths etc so a few mods req also.

JC

Originally Posted by wrinklearthur

Yes forget them, they are history !! Because first you must find a Forward control !!
They were a fantastically strong diff, as they used a third bearing, that was built onto the nose end of the pinion.

IMHO the half shafts still remained a weak point however.

Cheers Arthur

They were still a spiral bevel diff with the relatively weak 10-47 tooth count though Arther, so not that strong for the size.And nowhere near as strong as a Salisbury. And the tiny little parrallel roller straddle pinion bearing was necessary because just like a 9'' Ford the 2 taper roller pinion bearings were too close together.
Wagoo.

Originally Posted by rovercare

Same as the 3rd bearing on the Ford 9", which stops the pinion walking off the crown wheel, effectively "pegged" from factory

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.

Originally Posted by Xtreme

Ummmmm maybe .................. but according to post #5 (and following) by Dave Ashcroft, it sounded more like a design fault which I thought would have been common to both Td5 & Puma.

Must go and search for your trip report and pics from yesterday, hope you had a good day.

Somethings obviously different as Td5's aren't going through 3-4 diff's like the puma's are. Pat