Originally Posted by thastinger
How do you manage to pull a sample from this thing? I holds barely more oil than the size of the blackstone sample bottle
Haha. I know right! Luckily it has a drain plug or I'd be scratching my head on this one. Now only if the rear diff has a drain plug too....
Originally Posted by Snagglefoot
Originally Posted by mpgo4th
Originally Posted by Snagglefoot
Is this the PTU that doesn't have a drain plug? A magnetic plug is also a great way to gage wear. Yes, I realize slivers of steel are not the same as ppm.
It's still complicated to get a baseline because of the conditions under which it operated, such as how much torque splitting was going on etc. How much driving on slippery roads vs cruising down a dry highway. Thanks for the post.
Torque splitting is happening in the rear electronically. The PTU is turning if the car is moving.
I'm certainly no expert on this. Given what you said then, it sounds like there is not much going on inside the PTU, except having the rear end calling for torque, and that torque is also seen in the gears of the PTU, sort of like on, off, on, off, as the rear wheels call for torque. That should cause some wear.
There doesn't sound like a lot is going on, but there are tons of failures of these PTUs.
Mpgo4th is right. The PTUs are always spinning. The newer designs have PTUs that only spin when there is a demand. My PTU holds less than 12oz of oil.