I just got a 1990 Montero (4 door, V6, Manual) as a parts car for my Æ89 Raider. I took the rear differential out of the Montero to rebuild it.

Now, the factory service manual for my Raider shows that the LSD should have one spring plate and one spring disc (as well as two friction plates and two friction discs) per side. But, my differential from the Montero has two spring plates and no spring disks on each side (the spring plates have the lobes on the O.D., whereas the spring discs have the lobes on the I.D.)

So the question is, does my differential have the wrong parts in it, is the Dodge manual wrong, or was there a design change?

Note: The Montero shows 200K on the odometer, yet the all the disks and plates in the differential show very little wear. None of them have more than 0.03 mm of wear (most less than 0.01 mm) out of an maximum allowed wear of 0.10 mm. This makes me think that possibly the differential was rebuilt and the wrong parts were installed.

Any thoughts? Thanks.