M998 Front Differential

[General Hood]

Both output seals installed. I wasn't fortunate enough to own the HMMWV special seal driver, but a 2" PVC coupling worked great, and I had one handy. Assembly temporarily halted when the wife hollered chow time.

 

[Bulldogger]

Both output seals installed. I wasn't fortunate enough to own the HMMWV special seal driver, but a 2" PVC coupling worked great, and I had one handy. Assembly temporarily halted when the wife hollered chow time.
View attachment 732774

Looks MUCH better! Well done. BDGR

 

[Action]

Are some of you calling that blue star washer an output seal?

 

[General Hood]

Are some of you calling that blue star washer an output seal?

no, the output seal is in this photo

 

[General Hood]

Went ahead and replaced both brake rotors since the old ones were scored and pitted



The brake line flare fitting adaptor on the driver side caliper was 80% blocked with whatever whitesh looking thread sealant Uncle Sam used. I pulled it off to clean it up and noticed globs of that same sealant down inside the caliper piston. Local Oreilly Auto Parts has the calipers cheap, so might as well replace those while Im at it

 

[General Hood]

I'm having what I presume to be rookie issues with re-assembly. I couldn't get enough clearance between the driver side brake rotor and the CV shaft to mount the shaft in place. At the suggestion of fellow member IGM, I went ahead and worked the passenger side and it all went together easily as pictured
View attachment 733078

However, driver side still does not have clearance
1.) I took the output flange back off and inspected the components- no burrs or obstructions, re-installed and it noticeably seated against the bearing housing on the output shaft
2.) visual inspection revealed the bright area of the output flange that rides inside the output seal is where it is supposed to be
3.) I made somewhat of an attempt to measure between the flange and pumpkin on both sides and there was no noticeable difference
4.) One thing I did notice that may or may not make a difference - the passenger side CV shaft had more than enough clearance, in fact I had to stretch it a little toward the flange in order to mount, whereas the driver side doesnt have enough clearance to mount, as pictured here


Please advise best course of action, and thanks in advance

 

[Milcommoguy]

Thinking out loud here... Would turning the steering wheel a little open up the gap?

Don't scream, I'am sensitive, CAM

 

[Milcommoguy]

Thinking out loud here... Would turning the steering wheel a little open up the gap?
Don't scream, I'am sensitive, CAM

 

[Milcommoguy]

More thinking... Jack up the frame so that the control arm drops a bit.

My head starting to hurt. Bigger hammer? I'am done, CAM

 

[cwc]

The inner joint is the "plunge" joint and should slide in and out a couple of inches. Is it stuck in the fully extended position?


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[Action]

Yeah, lower the hub. compress the halfshaft into the hub some. It may help to slide the inner end arounf the flange and bring it in from the top.

 

[General Hood]

The inner joint is the "plunge" joint and should slide in and out a couple of inches. Is it stuck in the fully extended position?



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actually I had to slide it in an inch to get it to where it is, and that's all she would give me




actually I had to slide it in an inch to get it to where it is, and that's all she would give me

 

[General Hood]

Yeah, lower the hub. compress the halfshaft into the hub some. It may help to slide the inner end arounf the flange and bring it in from the top.

I tried that earlier, still not enough clearance. Frustrating

 

[Action]

Did you get the left and right halfshafts on the wrong side?

 

[Action]

Went ahead and replaced both brake rotors since the old ones were scored and pitted

View attachment 732843

The rotor isn't seated on the output flange properly....
As a last resort, you could take the upper ball joint out of the hub and lean the hub out. But, you don't want the halfshaft bound up when installed.

 

[General Hood]

Did you get the left and right halfshafts on the wrong side?

Halfshafts werent removed from the wheel side

 

[General Hood]

Update: I had some local mechanics look it over and they are of the opinion there is a problem within the halfshaft assembly, as some of you had referenced earlier. I havent remove the boots to diagnose, but with all the past issues I have had with this truck, my best bet is to just purchase a new halfshaft and hopefully no further issues in the immediate future. I will post a response once the new halfshaft arrives

 

[Action]

Before spending $$ on a new shaft, why dont you remove the upper ball joint, tip the hub out, bolt the halfshaft to the rotor, then put the nut and pin back on the upper ball joint? that wont cost you anything.

 

[General Hood]

Before spending $$ on a new shaft, why dont you remove the upper ball joint, tip the hub out, bolt the halfshaft to the rotor, then put the nut and pin back on the upper ball joint? that wont cost you anything.

I'm thinking that would bind the shaft up. There is less than half an inch in/out movement on the plunger end of the half shaft

 

[cwc]

It wouldn't cost anything to pull the inner joint apart and see if it is limited in its travel - just messy.


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