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fastbird86
03-20-2005, 12:42 AM
I went to an AutoX school today to sharpen my skills, on break I happen to lean against the rear left side of my car, when I leaned on it it made a clunk noise. I starded to shake the car side to side and continued to hear a clunk noise. I lifted the rear of the vehicle up of the ground and was able to move the the rear wheel back and fourth about 3/4 of an inch, and it also made a clunk. Has anybody ever incountered this before. Both sides are doin the same so that would lead me to belive that its normal but the a hell of a lot of play for an axle shaft.

lowcat
03-20-2005, 01:26 AM
Yup, I don't reckon that is too good right there. :hick:

Ifixyawata
03-20-2005, 03:43 AM
My '85 T-bird did that ever since I got it (the clunk, not sure about a full 3/4" play in the wheel). It was also accompanied by a rear gear whine that changed pitch depending on whether you were turning or not. A few months ago the 7.5 let go and the car's been sitting since.

tbirdscott
03-20-2005, 04:13 AM
My tbird does the 'clunk clunk' when you rock it from side to side but i'm not too sure about the 3/4" of play, that sounds excessive to me.

Thunder Chicken
03-20-2005, 10:17 AM
The clunk is normal due to the type of axle retainers these cars use. The axle slides in further than it normally seats, then you insert a C-clip, then you pull the axle back out until the C-clip prevents it from coming any further, and then a pin goes through the diff between the two axles. This pin is for the spider gears but it also keeps the axles from sliding back in to the point that the C-clips could fall out. By its design there is a lo of slop in the setup. 3/4" of play isn't normal, though. If you really have that much play I would strongly recommend that you remove the diff cover and inspect the C-clips, axle ends and spider gear pin.

fastbird86
03-20-2005, 09:20 PM
I will probably check that out on monday when I get to the shop, Just in case there is something wrong this may be a good time to install the 3.73s and rebuild the clutch paks, and since the fluid has probably never be changed in 158k miles I might as well replace all of the bearings, any body know where I can get a complete bering kit for an 8.8 :D

lowcat
03-20-2005, 10:57 PM
When I rebuilt the 7.5 in my car NAPA had all the bearings and seals that I needed in stock.

blownbirds
03-21-2005, 12:15 AM
Call summit they have a whole raer axle kit including shims and what not for a new rear setup, runs about $120

fastbird86
03-21-2005, 07:22 PM
Checked the end play on the axles at the shop today with a dial indicator, the Drivers side axle is .025 thousands and the passenger side is .035 thousands. Does anybody have any specs because I couldn't find anything on ALLDATA.

JeremyB
03-21-2005, 09:47 PM
Checked the end play on the axles at the shop today with a dial indicator, the Drivers side axle is .025 thousands and the passenger side is .035 thousands. Does anybody have any specs because I couldn't find anything on ALLDATA.
This thread should help you out.
http://www.corner-carvers.com/forums/showthread.php?t=773&highlight=endplay
I looked in my '85 Helm manual, but didn't find an endplay/sideplay spec.

On Edit: My friend found the endplay spec. in his Helm. The maximum is .030. There is no minimum set. I wouldn't go less than .006-.008 so as to keep the pinion shaft from burning up.

fastbird86
03-22-2005, 10:49 AM
Well guess its time to rebuild the rear end. One question though. should I buy new axles for the car. I was looking at the summit sight and found that Moser makes 4-lug axles for the 8.8, but I don't know what legth would be correct for my axle. Any body know the axle lenth for a TC rear end?

JeremyB
03-22-2005, 11:13 AM
Well guess its time to rebuild the rear end.
You mean rebuild the traction lock, not the entire rear end...right?



One question though. should I buy new axles for the car.
I don't think you need to. You're not putting out a lot of power. You'll probably wear out the axles' bearing race before you snap one in half.

fastbird86
03-22-2005, 12:06 PM
You mean rebuild the traction lock, not the entire rear end...right?

Why not! it has almost 160,000 miles on it might as well replace all the bearings and seals, and install the 3.73 gears I have for it :D

softtouch
03-22-2005, 06:12 PM
The '84 shop manual says if the axle end play is more than 0.025 inch it can be fixed by putting a shim behind the C-Washer.
Using the C-Washer as a template make a shim the same shape as the C-Washer.
The axle must have a minimum end play of 0.005 inch.