Finally doing rear seal job

[89Suburban]

They are the PPV 16" brakes. Had them for a year now and still love them.

Been just chipping away at this after work this week. Got the trans bolted back up with a new torque converter. Transfer case went back in with a new output shaft seal (89059495). There's a chance it all gets wrapped up tonight.

Can you post pics of the old seal so we can see how a "bad seal" looks?

 

[zissou]

Are you sure you still have VVT enabled on that engine? The back of that cam says Cam Motion and I'm 99% sure they make only 3-bolt cams.

Hard to make out the specs but it looks like it might be their Stage 2 Truck cam based on the 212 & 220 that I can see - most likely the 'drop-in' version:

View attachment 419153

6.2 Stage 2 LS Truck Camshaft (212/220-117+5)

Superior high performance LS & Gen 5 LT camshafts for GM cars and trucks equipped with LS1, LS2, LS3, L99 & new LT engines.

cammotion.com

Yes, it is a drop in 212/220 version. The front of the cam is 3 bolts despite what the rear looks like. VVT was deleted.

 

[Geotrash]

Yes, it is a drop in 212/220 version. The front of the cam is 3 bolts despite what the rear looks like. VVT was deleted.

Got it. My mistake - I misunderstood your first post. Sorry about that.

 

[Larryjb]

Can you post pics of the old seal so we can see how a "bad seal" looks?

This was mine. The RMS itself probably wasn't leaking much if at all. It was the rear cover that was leaking so much. Once i had the cover off the gasket was so compressed there was no way it could seal properly anymore. New RMS and gasket has been on since June 2020 and no leaks. (Still need to do the front seal though. But rear bearings are more important now.)

 

[89Suburban]

This was mine. The RMS itself probably wasn't leaking much if at all. It was the rear cover that was leaking so much. Once i had the cover off the gasket was so compressed there was no way it could seal properly anymore. New RMS and gasket has been on since June 2020 and no leaks. (Still need to do the front seal though. But rear bearings are more important now.)

Just like the VLOM gaskets that go bad. Very interesting. Appreciate you posting this and the pic.

 

[donjetman]

@Larryjb
If anybody wants pictures (especially post #15) of a rear main seal job and part #s see my thread from late 2018:
https://www.tahoeyukonforum.com/threads/rear-main-seal-job-pan-etc-07-yukon-denali-6-2.108334/

 

[zissou]

This was mine. The RMS itself probably wasn't leaking much if at all. It was the rear cover that was leaking so much. Once i had the cover off the gasket was so compressed there was no way it could seal properly anymore. New RMS and gasket has been on since June 2020 and no leaks. (Still need to do the front seal though. But rear bearings are more important now.)

Same story here too. The RMS itself was probably fine, but the gasket was flat. I had a small leak from the cover gasket combined with a small leak from the torque converter seals. The transmission shaft o-ring (24219390) was rock hard and felt like plastic and the torque converter seal (24237531) had signs of leaking due to some grime inside the bell housing behind the torque converter.

Got the truck started last night and so far so good, no leaks after idling for about 30 minutes.