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#1058149 - 07/08/18 03:00 AM Re: SSLance's Build thread [Re: SSLance]  
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FrankOC Online beer
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Originally Posted by SSLance
Didn’t hit my head on a ramp once either...


I’ve learned to wear a hat to cushion the blow


84 - Stock
85 - ZZ383, 6-speed
#1058150 - 07/08/18 03:03 AM Re: SSLance's Build thread [Re: SSLance]  
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mmc427ss Offline
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Ouch! Good catch.
Some new carriers need to be washed out thoroughly to get machining chips totally removed. But i know you did that when you installed the new springs in the locker. No experience with either the locker or putting a 9" together, mostly Spicers, but it's the bearings, or gears usually.

Back in the Midwest you had a rear guy, find anyone there yet?

If it was me I'd have a 16x16x1/4 harder rubber mat under the jackstands, and not because the paint is pretty. Steel on steel, not good.

Lifting the rear at the center and installing stands at #4 can't be done?
Bob

#1058164 - 07/08/18 03:27 PM Re: SSLance's Build thread [Re: SSLance]  
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The car is sitting about 50% on the chassis jacks mid frame and 50% on jack stands, it is very steady. But yes...it can be done better for sure.

I might have some pad extensions fabbed up halfway between my short ones and long ones which will help but shorter jack stands are really what is needed.

I know a guy...that has a guy... here to rebuild the diff, I'm sure I'll be meeting him in person this week.


Lance
1985 Monte Carlo SS Street Car
#1058230 - 07/12/18 01:53 PM Re: SSLance's Build thread [Re: SSLance]  
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That moment when you realize your pinion gear has been the only thing holding your ring gear on for how long....

[Linked Image]

[Linked Image]


Lance
1985 Monte Carlo SS Street Car
#1058231 - 07/12/18 02:06 PM Re: SSLance's Build thread [Re: SSLance]  
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Ouch!
Thats gonna hurt.


[Linked Image]
87 Monte SS / Black-Saddle T-Tops
85 Monte SS / Black-Gray T-Tops (Wifes Car)
SMCC Florida Chapter

#1058232 - 07/12/18 02:35 PM Re: SSLance's Build thread [Re: SSLance]  
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MC96 Online content
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That answers my question about which locker springs to run.

Think the case can be salvaged?


86 SS
400SBC, 4l80e, MSD Atomic injection/trans controller, Tilt glass clip, all tubular arms, corvette brakes, 9" rear
In progress
#1058234 - 07/12/18 03:06 PM Re: SSLance's Build thread [Re: MC96]  
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Originally Posted by MC96
That answers my question about which locker springs to run.

Think the case can be salvaged?


Not sure what the locker spring has to do with the ring gear bolts not being loc-tite'd or torqued properly on install?

Also not sure what can be salvaged yet either. That ring gear has been on 4 different diffs over the years, I really hope it's okay. Need to find the source of all the metal, most likely the front pinion bearing me thinks but we'll see.

What pissed me off most is every time I pay good money for someone else to do something for me on this car, it turns to crap...


Lance
1985 Monte Carlo SS Street Car
#1058235 - 07/12/18 03:18 PM Re: SSLance's Build thread [Re: SSLance]  
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All of these bolts came out of the carrier with our fingers...

[Linked Image]

I was so intent on inspecting the gear teeth I never even turned it over to look at the ring gear bolts...until I set it up on my friend's bench. Pretty sure my jaw hit the floor when I saw the loose bolts sticking up.

The rear bound up on me while backing into my grid spot at Good Guys in March, took three tries to get it to release. Pretty sure that is when the first bolt fell out and egged out the one hole on the carrier. I made 4 more runs that day then about 3 weeks later made 4 runs at local SCCA autocross to secure my Spring Series CAM T championship. Other than that I've only driven the car to one cruise night. I could tell there was some binding, every now and then car was very difficult to roll by hand but for the most part, no other signs of an issue.

The locker has made a pretty serious BANG when releasing almost since new which none of my friends with the same lockers hear in their cars. I thought it was "normal"...now second guessing everything...

It's been in the car for 2 years, 3 track day events and a BUNCH of autocross runs on it. SO happy I held off on hitting a road course out here until I had time to inspect it further. It could have ended very badly...


Lance
1985 Monte Carlo SS Street Car
#1058236 - 07/12/18 03:34 PM Re: SSLance's Build thread [Re: SSLance]  
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Don't that suck!!!!!!!!!!! You are hard on equipment.

One of the reason I do everything myself, if it fails I only have one person to blame, the old blind guy.
Bob

#1058237 - 07/12/18 04:16 PM Re: SSLance's Build thread [Re: SSLance]  
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MC96 Online content
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Originally Posted by SSLance
Originally Posted by MC96
That answers my question about which locker springs to run.

Think the case can be salvaged?


Not sure what the locker spring has to do with the ring gear bolts not being loc-tite'd or torqued properly on install?

Also not sure what can be salvaged yet either. That ring gear has been on 4 different diffs over the years, I really hope it's okay. Need to find the source of all the metal, most likely the front pinion bearing me thinks but we'll see.

What pissed me off most is every time I pay good money for someone else to do something for me on this car, it turns to crap...


As in which color you run for auto cross.

Sucks to see, I called a local place about locker parts and they said usually if it needs one thing you're better off just getting a new unit.


86 SS
400SBC, 4l80e, MSD Atomic injection/trans controller, Tilt glass clip, all tubular arms, corvette brakes, 9" rear
In progress
#1058239 - 07/12/18 04:30 PM Re: SSLance's Build thread [Re: MC96]  
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Originally Posted by MC96


As in which color you run for auto cross.

Sucks to see, I called a local place about locker parts and they said usually if it needs one thing you're better off just getting a new unit.


Ah...gotcha... laugh

Yeah, it's tough trying to decide. Thing is, I've heard more stories about brand new parts failing these days than I have about reused stuff... Personally, I think the locker itself will be fine if the one egged out hole isn't an issue. There are no bearings inside it, just metal parts that lock together...so running ground up metal through them doesn't seem like it would hurt it. They either engage...or disengage...no other moving parts to speak of. The ring and pinion gear are a different story though... Gotta decide just how much wear they took on the face of the teeth... Much more of a judgement call. All bearings are a certain on the remove and replace list for sure.


Lance
1985 Monte Carlo SS Street Car
#1058240 - 07/12/18 04:45 PM Re: SSLance's Build thread [Re: SSLance]  
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MC96 Online content
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I guess the only issue I see is the wave in the case, maybe being bolted up will take care of that. Might have to take the pinion support off and spin the carrier in the case and check for run out now before you find it in final pattern check.

I dont see a problem with used gears as long as they pattern right especially if they are a (somewhat) lower numerically ratio and non-hunting. Something Ive noticed with the quick changes is nobody seems to care about pinion pitting. Although Im not sure how spiral bevel translates to hypoid.

Any high pitched whine at speed? I believe most common wisdom says the pinon bearings usually fail but Ive seen a carrier bearing destroy a carrier without touching anything else. Then we put in a new carrier/bearings. rebolted the ring gear to it and reused the shims as they came out and it never had an issue, in a 10 bolt in a Jimmy, didnt even check the pattern.


86 SS
400SBC, 4l80e, MSD Atomic injection/trans controller, Tilt glass clip, all tubular arms, corvette brakes, 9" rear
In progress
#1058241 - 07/12/18 05:23 PM Re: SSLance's Build thread [Re: SSLance]  
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The 9" has always been a bit noisier than the 7.5" it replaced but nothing that sounded out of place. The wear pattern on the ring gear teeth looks great and no real sign of metal coming off of them. There is considerable metal in the bottom of the housing though, look at the bolt above sitting down in it. No real noticeable backlash or sloppiness anywhere else than can be felt by hand and the ring gear is still tight on the carrier (I guess it's a bit of a press fit).


Lance
1985 Monte Carlo SS Street Car
#1058248 - 07/13/18 04:28 PM Re: SSLance's Build thread [Re: SSLance]  
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MD
I would at least take the locker apart and clean it out really well and reassemble. I rebuilt the front axle in my escalade twice, meticulously, and it still started whining and growling. A guy at work told me to take the carrier apart and sure enough, the side and spider gears were wearing badly on the carrier. Replaced the thrust washers and the carrier housing, new bearings one more time, and haven't had a problem since.

That carrier flange looks scary to me. I second the suggestion to check run-out.

Any word from QP on their lack of Loctite??

Last edited by SickSpeedMonte; 07/13/18 04:29 PM.
#1058249 - 07/13/18 04:35 PM Re: SSLance's Build thread [Re: SSLance]  
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It wasn't QP that put it together the last time, was a local (KC) well recommended shop. I'll let the local (Phoenix) guy doing it this time do what he does...as I'm at his mercy. I grilled him pretty good about what is good and what needs to be done and he says he is on it and it will be fine. I'm pretty certain that there aren't any bearings or gears inside the locker, just mechanical teeth that engage or disengage depending on the spring pressure. Lot less moving parts than a normal type diff.

He has checked the run out and it is good...


Lance
1985 Monte Carlo SS Street Car
#1058252 - 07/13/18 07:07 PM Re: SSLance's Build thread [Re: SSLance]  
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MC96 Online content
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No bearings in the locker. Good time to check teeth in it though. I was on the fence about replacing mine and had to resort to a few mass circle track FB group posts. Rebuilding them it seems isnt very common and I struggled to find part numbers, I wish I wouldve found a few pictures that showed what a toasted one looked like. I finally had a guy comment on a post saying they were fine so I guess I'll trust a stranger.

The price of the new ones scared me off a little too, I think it was $90 or so for each side piece.

I did make a steal on the locker itself, traded it even up for a the spool and as far as Im concerned junk rink and pinion that came in the qc to a guy. Also got about $600 worth of bolt on spindle pins and axle tubes for $60.
Speedway was closing out ring and pinions for $149 too.

Come to the dark side Lance, youd love a quick change.


86 SS
400SBC, 4l80e, MSD Atomic injection/trans controller, Tilt glass clip, all tubular arms, corvette brakes, 9" rear
In progress
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