Standard equipment in some year models.
You already know the Merritor name replaced Rockwell? Before that they had a joint venture called Rockwell International.
At other times they used a lot of Spicer products.
You are probably running SQH Rockwells. Pic of LF front diff unit?
Rearend parts
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by God prefers Diesels, May 11, 2021.
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I have R945007 and 008 for this axle. Input nut 2 1/4, output nut 55mm. (I expect input nut was metric too, maybe 57mm. They didn't have 57mm, and 56 was too tight, 58 too loose)
Anyways, you said you removed the wear ring. I am currently fighting the OUTPUT pinion. I have a unitized seal like the rear main seal on an ISX engine. The seal did not look like it would fit the yoke, however it fit the housing well. My yoke measured 3.10" wide, but there's no spec for that. It should be either 3.00 or 3.25. Now there was a flange on that yoke that looked like a metal dust cover. Was that actually a wear ring that I should have removed? Here's what's happening -
I drove the seal into the housing. I put on the yoke and finger tightened the locknut. I started using a 1/2" ratchet to seat this yoke into the seal. Of course this did not seem right, but I figured it's a seal, so what the hell it should be tight. Anyways I get sick of fighting the ratchet, so I put the 3/4" gun on it, and finish seating the yoke. Now I can't move the yoke. I put a 24" pipe wrench handle through the U-joint straps and put everything I've got into it to get it to rotate. So I figure using the output shaft to pull in the yoke has got the bearings in a bind. I get a block of wood and a 4 lb sledge and beat on the output shaft. Didn't help. So I back off the nut some, and sure as ####, it starts to turn nice and easy. But the thing is, that nut is supposed to be 600-700 pounds torque. I've got maybe 80 lbs on it right now. Any more, and it starts to bind again. I could stick a piece of dynamite under this ####ing truck right now.
Any ideas on what the heck I'm doing wrong here? Never had a problem with a pinion seal in my life. I'll post a pic of old seal and new seal from my phone.
Edit: Ignore the part number on the bag. You can't mix up the front and rear seal because they are way different in size, so that's not the problem.
Last edited: May 17, 2021
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