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post #1 of 39 Old 09-05-2007, 01:29 PM Thread Starter
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Grenaded the rear

Looks like the TT notch has yet another ailment. This time not headgasket related. Giving the car a "test" on the street yielded a loud bang when in 3rd. First I thought it was the driveshaft. But seeing the pumkin cover gashed down the middle made me think otherwise. Not sure what went. Autopsy to follow soon.
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post #2 of 39 Old 09-05-2007, 01:32 PM Thread Starter
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Not the autopsy but here is what I mean.
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post #3 of 39 Old 09-05-2007, 01:42 PM
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NICE!!!!! I just had that happen to mine about a month ago. lol. Damn turbo cars and their crazy torque.

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00' GT 641hp/536tq - Novi 2K(17psi)
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post #4 of 39 Old 09-05-2007, 02:00 PM Thread Starter
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I had a feeling there were other "victims of torque" out there.
What went on yours? Did it leave the same scar?
Erich

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post #5 of 39 Old 09-05-2007, 02:08 PM
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I cant wait to see what went lol

Don't get shook of a little bone stock 302 short block!!

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post #6 of 39 Old 09-05-2007, 04:15 PM
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My camaro's rear end looked like that once...it was a result of a bolt backing out of the ring gear

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post #7 of 39 Old 09-05-2007, 05:42 PM
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NICE!!

1989 LX: Vortech YS-Trim blown DSS 347, Stage 3 Twisted Wedges, Holley Systemax 2, AFM B-451 cam, AFM Power-Pipe, AFM PMS, 80mm Pro-M, Aeromotive 1000 hp fuel system, Precision Turbo 65 lb/hr injectors, UEGO 1000 Wide Band O2, MSD 6BTM and Distributor, 33-spline Moser axles and spool, Bogart Drag-On Stars, UPR Chromemoly K-member and A-Arms, Kooks 1-7/8", Dr. Gas, 130 amp alt, etc.

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post #8 of 39 Old 09-05-2007, 05:46 PM
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I imagine it will look something like the Eaton diff in my 01 I used to have.


90 notch

Excuse me, ma'am, do you think this rag smells like chloroform?
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post #9 of 39 Old 09-05-2007, 08:17 PM
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My cover was ok, but its a trickflow rearend girdle. It looked like one of my spider gears was wearing itself into the diff. and eventually it got loose and the crosspin broke, shattered the spring and spider gears. Then all of the broken chunks got ran through the ring and pinion and broke teeth off. It also made some nasty cracks in the trac-lok.

On a good note the moser axles survived the carnage. Let us know how yours turns out.

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post #10 of 39 Old 09-05-2007, 08:19 PM
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I still cant believe my 7.5 rear is still in holding up!!!!

SORRY to hear its down again !! hope you get it fixed so you can enjoy it for a while..

Greg... NICE JOB !!!! you dont paly around do ya? lol lol lol


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post #11 of 39 Old 09-06-2007, 12:42 PM Thread Starter
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Looks like it was either the spider gear or the pin. I was worried that the bolt holding the pin in had come out but no. You can still see a piece of the pin in there. Overall, it does not look bad in there. I wounder if it would be possible to just replace the posi and spider gears and give it a clean up?



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post #12 of 39 Old 09-06-2007, 03:42 PM
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Nice! Found the weak spot.

Inspect the ring & pinion real good for any nicks, chips, big scratches, or 'other carnage'. I would say if you dont spot any, then it would be good to go. FRPP sells a nice 31 spline diff. Also consider getting a TA cover or equivelent.

One of the first things I did to my car was upgrade to 31 spline and strange spool. I drive my car on the street, but not very often.
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post #13 of 39 Old 09-06-2007, 03:52 PM
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That one definitely needs to go up on the wall in your garage!!!

Wayne
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post #14 of 39 Old 09-06-2007, 06:31 PM
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Quote:
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That one definitely needs to go up on the wall in your garage!!!
I concur!

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post #15 of 39 Old 09-07-2007, 08:02 AM Thread Starter
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These are all going into the broken parts hall of fame. The cover has to go on the wall. The broken gears and shaft are at work on my desk.
Erich

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post #16 of 39 Old 09-07-2007, 08:26 AM
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WOW! Erich you are having some bad luck!
sorry to hear.
In third....wow!

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579.2rwhp 658.6rwtq,[email protected] kicked off track
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post #17 of 39 Old 09-07-2007, 03:27 PM
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Greg... NICE JOB !!!! you dont paly around do ya? lol lol lol
260 rwhp launching on MT DRs off a 5500 two step. Kaboom.








90 notch

Excuse me, ma'am, do you think this rag smells like chloroform?
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post #18 of 39 Old 09-07-2007, 08:31 PM
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Greg K-
So, either the T/A girdle did its job, meaning it could have been worse, by spraying all the guts of your diff on the starting line... or they aren't worth the money? Pretty much a toss up there.

Is the T/A on your garage wall?
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post #19 of 39 Old 09-07-2007, 10:47 PM
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I think its at the guy's shop along with the very small box containing the remains of the Eaton.

90 notch

Excuse me, ma'am, do you think this rag smells like chloroform?
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post #20 of 39 Old 09-08-2007, 12:37 AM
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nice job greg, now i am wondering about my eaton erich at least it wasn't the trans

http://www.newtakeoff.com/index.asp?...OD&ProdID=7855

maybe this will help some
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post #21 of 39 Old 09-10-2007, 07:01 AM Thread Starter
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Thanks for the info.
Yeah, I am glad it was not the trans! I rebuilt that thing myself and would be really sad to see all those new gears and sliders end up as junk.
Erich

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post #22 of 39 Old 11-12-2007, 02:26 PM
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First time, I stripped the pinion gears in the stock diff. Then I got a Detroit Tru-trac w/moser 31 spline axles. The 2nd time I bent the LH axle tube and LH axle, first time launching on the new Moser stuff. Then I threw the 8.8 out and got a Moser built 9". I took it out to the track and the first launch snapped my pinion gear in half.

Moser says its because I have a 3.50 ratio and I'm dumping the clutch at 4k on Hoosier 335 drag radials with 650lbs rwtq.

Moser buys their gears from US Gear, they are gonna try to warranty it for me. I dunno if its worth the trouble.

Matt
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post #23 of 39 Old 12-05-2007, 08:23 PM
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Erich,

Any luck on the rebuild?

Chris
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post #24 of 39 Old 12-07-2007, 08:07 AM Thread Starter
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Hi Chris,
Not much luck. But I did try a few things.
Just to make sure that the noise was not being transmitted from the trans or something, I took off the driveshaft and plugged the tail shaft with an old yoke and ran it. Quiet as a mouse.
I replaced the carrier bearings and reassembled. Still makes the noises.
Next up, I have a good set of 2.73 gears (my originals from the 97 with only 18K on em). I am thinking that there may be some distortion in some of some of the pinion teeth on this gear set I have in there and maybe that is what is causing the noise. So I will swap in those gears and see what happens.
I think this is leading towards a total replacing of everything like you mentioned. It is just going piece meal instead of just doing it.
Erich

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post #25 of 39 Old 12-08-2007, 10:44 PM Thread Starter
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In an act of despiration, I pressed the bearing off the 3.27 pinion, transfered it plus the spacers to my old 2.73 gears (perfect cond except a little rust). I transfered over the ring gear as well. I set the pinion to have the correct drag and then put the carrier in. Did not even bother to have the correct load on the pinion bearings.. Now it seems that noise is gone. I think it may have been some distortion on the old gear set. Not all teeth were the same if you look carefully. I think this may be the solution.
Erich

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post #26 of 39 Old 12-09-2007, 09:23 PM
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congrats on the diagnosis, when will it be up and running again & and hows the procharger rebuild coming?
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post #27 of 39 Old 12-10-2007, 07:54 AM Thread Starter
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Well I should have the car ready for a test drive pretty soon. I have the gears in. Just need to put the axles and brakes back in. I guess I can aim for good mpg with the 2.73s lol. Eventually, I'll go back to 3.27s or 3.31s but redo everything again with 31 spline axles and carrier.
The procharger reached ATI last week. I am trying to figure when to start bugging them for a diaganosis/quote.
Erich

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post #28 of 39 Old 12-10-2007, 09:30 AM
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I've had A LOT of issues lately trying to find quality gears. I just had to re-do my last ring and pinion job for free. I used a Moser brand ring and pinion and spent a lot of time setting it up totally to spec. I even went out and bought a $400 pinion depth gauge, just because it pays to be dead on when you are doing gear swaps quite often. I drove the car down the road and took it back to the guy, it was nosier than hell. I took it all apart, and put my old Ford Racing 3.55 in there for the guy and gave him the gears for no charge, they are quiet as can be. ALso, like I said in my earlier post, I snapped my Moser 9" pinion gear in half a few months ago.

Long story short, when you change your gears again, make it the last time and buy a quality gear like Richmond or Motive. Ford Racing gears are made by motive, and thats what I usually use now.

As for my car, I found a website thru a guy here at work who is on a Busch team's pit crew called www.2ndchanceraceparts.com. I picked up a Richmond 3.40 ratio gear from Bobby Hamilton Jr.'s car that has been shot peened and micro polished. It only had one race on it and looked perfect. I got it for $100! Here are some pics:

Difference in quality, Moser vs. Richmond (look at the thickness):


Broken pinion:


Polished replacement:

Matt
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post #29 of 39 Old 12-10-2007, 09:44 AM
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By the way, I'm jealous if you are gonna be able to take your car out for a spin Erich. I'm starting at ice and snow out my window right now as my car sits in storage

Matt
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post #30 of 39 Old 12-10-2007, 01:02 PM Thread Starter
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Yeah it is pretty nasty out here as well. I will wait till it dries up.
Erich

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post #31 of 39 Old 12-11-2007, 06:37 PM
 
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I've had A LOT of issues lately trying to find quality gears.
Have you given Precision Gear a try? They seem to make some rather stout and quality gear sets. A friend of mine says he has destroyed every brand out there, but of the ones he has ran, the Precisons have broken the least (using GM 14 bolts however).
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post #32 of 39 Old 12-11-2007, 08:08 PM
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I'll keep that in mind. The Richmond is working for me now. If its tough enough for NASCAR, I don't see how I can break it.

Matt
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post #33 of 39 Old 12-22-2007, 12:59 PM Thread Starter
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With the old 2.73 gears in there, no more strange noises. So mystery solved, I guess the 3.27s got distorted when the pin let loose.
Erich

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post #34 of 39 Old 12-22-2007, 03:07 PM
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I'll keep that in mind. The Richmond is working for me now. If its tough enough for NASCAR, I don't see how I can break it.

I dunno man, I think you could break an Anvil in a rubber room!!
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post #35 of 39 Old 05-28-2008, 05:08 PM
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I dont know why but for some reason I had this thread book marked, any new carnage?
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