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Old July 23rd, 2010, 06:41 AM   #1
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Default diff "slop" question

2004 Astro with 10-bolt rear axle with the eaton gov-lock. Sumbitch whines like mad when driving and has about 10 degrees of slop/play in rotation. When you go front park/
neutral to D/R, there's a decent clunk from the play being taken up. Pulled the cover off and see that most of this play is coming from the spider gear interface inside the G80.

Is this much excess play normal? I was just planning on doing a R&P swap tomorrow - but now I'm not sure if I worry about the G80 too!?
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Old July 23rd, 2010, 06:50 AM   #2
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Spool. End of problem.
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Old July 23rd, 2010, 07:07 AM   #3
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LOL.

I seriously thought about welding it up, but this is a "Family Van" that needs decent road manners.
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Old July 23rd, 2010, 07:21 PM   #4
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get an open carrier or a Eaton replacement.
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An occasional jello or vasoline wrestling match isn't out of the question either.
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Old July 23rd, 2010, 07:45 PM   #5
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bang bus?
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Old July 24th, 2010, 01:05 AM   #6
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bang bus?
You wish... :P
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Old July 24th, 2010, 01:20 AM   #7
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convert it into a KTM van
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Old July 26th, 2010, 07:30 AM   #8
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convert it into a KTM van
LOL,
I'm not one of those dorks.
I love how people will "advertise" what's in a car or inside a trailer by putting all kinds of decals on the outside to show how cool they are.

Then promptly get those cool things stolen.
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Old July 26th, 2010, 12:45 PM   #9
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werd
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Old July 26th, 2010, 01:18 PM   #10
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LOL,
I'm not one of those dorks.
I love how people will "advertise" what's in a car or inside a trailer by putting all kinds of decals on the outside to show how cool they are.

Then promptly get those cool things stolen.
ya, i see a couple of those everytime i go into brighton lol. wowz that guy has alpine speakers!

so, every gov lock is destined to explode, even in cars and stuff?
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Old July 27th, 2010, 08:39 PM   #11
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Could be separate issues. Typically a worn set of spider gears won't make a noise while going straight.

Is the noise under acceleration or deceleration?
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Old July 28th, 2010, 05:38 AM   #12
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Could be separate issues. Typically a worn set of spider gears won't make a noise while going straight.

Is the noise under acceleration or deceleration?
My rear end had all kinds of issues.

- grabbing around low speed corners; wrong lube
- lot's o pinion slop; lots of worm gear lash
- other noise; nerfed pinion bearings

The noise and slop enabled me to get a significant discount on this thing (2004 Chevrolet Astro AWD) - far more than the parts and tools cost me to rebuild it (if I don't grenade it from building it wrong).
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Old July 28th, 2010, 05:47 AM   #13
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so, every gov lock is destined to explode, even in cars and stuff?
IMHO, I don't think so. The guys that explode theirs are increasing traction at the tires and in most cases, horsepower too. From what I understand, the 100 rpm difference needed for the locking is the root cause once you modify or beat on your gov-lock.

The 'splode comes from the set of ramps designed to clamp down on the clutches. It forces a lot of load on the ends of the case - and it gets critical when there's more traction / power than OEM. The case becomes the weak link instead of the traction interface at the tire - that difference causes the outward force of those ramps to burst open the case from the inside.

Honestly, if I didn't have all the last in those side gears, I probably would've reused the G80.
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Old July 28th, 2010, 03:29 PM   #14
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Rebuild? They only made about a six billion Astrosafaris during the 70 years they were in production, go find a rear end for 50 bucks and install it in a fraction of the time it will take to rebuild.

PS - I'm also a recipient of a G80 caused craigslist deal-o-the-day vehicle too.
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Old July 28th, 2010, 05:11 PM   #15
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Rebuild? They only made about a six billion Astrosafaris during the 70 years they were in production, go find a rear end for 50 bucks and install it in a fraction of the time it will take to rebuild.

PS - I'm also a recipient of a G80 caused craigslist deal-o-the-day vehicle too.
And potentially have a $2 pile of scrap under my van that is shittier than the axle I took out.
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Old July 29th, 2010, 03:15 AM   #16
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IMHO, I don't think so. The guys that explode theirs are increasing traction at the tires and in most cases, horsepower too. From what I understand, the 100 rpm difference needed for the locking is the root cause once you modify or beat on your gov-lock.

The 'splode comes from the set of ramps designed to clamp down on the clutches. It forces a lot of load on the ends of the case - and it gets critical when there's more traction / power than OEM. The case becomes the weak link instead of the traction interface at the tire - that difference causes the outward force of those ramps to burst open the case from the inside.

Honestly, if I didn't have all the last in those side gears, I probably would've reused the G80.
ah ha
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Old July 29th, 2010, 09:04 AM   #17
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Scooter,
I think you should change the title for this thread to "rear end" slop. I think it is more fitting to the discussion.

Thanks,
Tom
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