2 interesting things i found out about the p38

**andrew e** · 24th January 2009, 08:50 PM

1, the seats have heaters inside them, but they are not hooked up (the wires are there)

2, The diffs spin in the opposite direction, due to the viscous transfer which works like a limited slip diff (unlike a conventional constant AWD transfer that acts like an open diff). So this is the reason that the front and rear centers are not interchangable.

Ok, that doesnt sound right, the diffs do turn in the same direction, but the crownwheels are on the same side, where they are normally on the opposite. The tailshafts turn in the same direction, whereas they normally turn in the opposite direction.....confused? ok i'll shut up.

Andy

**Blknight.aus** · 24th January 2009, 08:59 PM

urmmm...

the crown wheels would need to be on the opposite sides and the shafts would have to counter rotate for it to be anything unusual.

**Scouse** · 24th January 2009, 09:06 PM

Thanks Andy. I didn't know about the seat heaters but some D2s (with leather) have the elements already in place too.

Interesting about the diffs too. I have seen the later Defender diff (Rover type) referred to as a P38 diff. Does this mean that the Defender is similar? Or is it the front diff oin the P38 that's skew-wiff?

**Scouse** · 24th January 2009, 09:09 PM

Originally Posted by Blknight.aus

the crown wheels would need to be on the opposite sides and the shafts would have to counter rotate for it to be anything unusual.

I thought Andy was trying to say that both crownwheels are on (say) the N/S & therefore are on the opposite sides when the centres are compared side by side.

**andrew e** · 24th January 2009, 09:10 PM

Originally Posted by Blknight.aus

urmmm...

the crown wheels would need to be on the opposite sides and the shafts would have to counter rotate for it to be anything unusual.

OK i am wrong. I got very confused

but hey atleast the seats DO have heaters (HSEs anyway)

**Blknight.aus** · 24th January 2009, 09:27 PM

I think what your getting at is that if with all the wheels off of the ground and you grab the rear prop shaft then turn it that the front shaft will counter rotate but as you have the VC the front shaft turns in the same direction

**andrew e** · 24th January 2009, 09:28 PM

Originally Posted by Scouse

I thought Andy was trying to say that both crownwheels are on (say) the N/S & therefore are on the opposite sides when the centres are compared side by side.

correct, this is what i was trying to say, but blacknight has me seccond guessing myself now. I am going to have a better look on monday.

**Blknight.aus** · 24th January 2009, 09:48 PM

my monies being on the diffs being the same (crown wheels on left hand and right hand side of the vehicle) with the propshafts rotating in the same direction.

the only time Ive ever seen counter rotating shafts is on some trucks that use a direct gear drive to get front output, same concept in gear drive as a normal transfer case but instead of driving a diff the rear output is always driven and the front out put is a dog engagement on a gear that hangs from the rear output gear.

**jbell110** · 26th January 2009, 08:06 PM

sorry wrong section

Jeff

**wayneg** · 10th January 2012, 08:10 AM

Originally Posted by Scouse

Thanks Andy. I didn't know about the seat heaters but some D2s (with leather) have the elements already in place too.

Interesting about the diffs too. I have seen the later Defender diff (Rover type) referred to as a P38 diff. Does this mean that the Defender is similar? Or is it the front diff oin the P38 that's skew-wiff?

Not sure the exact models years but having recently found out late defender 130`s have exactly the same diff as the p38. They could also be optioned on the 90`s

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2 interesting things i found out about the p38

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