Suspension and Chassis Questions about your suspension? Need chassis advice?

tried to search. help.

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Old 02-20-2012, 06:51 PM
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tried to search. help.

i have a question about the spohn torque arm. if i have a stock rear end now and want to someday upgrade to a 12bolt can i somehow do this or do i have to buy an entirely new torque arm specifc for the 12bolt? very expensive for me so just wondering. thanks.
Old 02-20-2012, 07:40 PM
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Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: tried to search. help.

The arm should be compatable with all stock and aftermarket bolt in rear axles. Don't forget you need longer.bolts for the torque arm.
Old 02-20-2012, 07:53 PM
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Re: tried to search. help.

i was confused i guess because they ask for the option of which rearend u are running. so i thought maybe they build it diffenent for a specific rearend setup.
Old 02-21-2012, 03:08 PM
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Re: tried to search. help.

86 is right.

The difference in ours is in the bolt kit only. The 12-bolt requires one long bolt and two cap screws instead of the traditional two long bolts.

ramey
Old 02-21-2012, 07:03 PM
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Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: tried to search. help.

Originally Posted by UMI Sales
The 12-bolt requires one long bolt and two cap screws instead of the traditional two long bolts.

ramey
orly? the strange 12 bolt uses 2 long bolts and i though the moser used 4 short ones? is it really 2 short and 1 long?
Old 02-21-2012, 07:29 PM
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Re: tried to search. help.

I thought that's how it was. I'll have to go in the assembly area and check. I thought from memory it was one long and two short...
Old 02-21-2012, 07:37 PM
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Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: tried to search. help.

you could be right, i just always though/was told, the moser used 4 short bolts.
Old 02-21-2012, 07:39 PM
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Re: tried to search. help.

We have a 12-bolt, a 9" and an M9 in the back. I'll check it out. If I was really sharp we'd spec a proper bolt kit and put it on our site.
Old 02-22-2012, 05:08 PM
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Re: tried to search. help.

anywhere i can get the proper bolts? so what exactly do i need for stock rear end. or just what i have?
Old 02-22-2012, 07:48 PM
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Re: tried to search. help.

Our bolt kit with two through bolts utilizes longer bolts than factory. I made a note to check the length tomorrow as well as publish the 12-bolt solution. Got busy today...

ramey
Old 02-22-2012, 09:09 PM
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Re: tried to search. help.

ok thank you. keep me posted. also still very interested in the kmember installs. keep me informed on that as well.
Old 02-23-2012, 10:41 AM
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Re: tried to search. help.

I made it to the install area. For our T/A bracket on a factory rear, you'd need our hard-to-find longer bolt kit. This kit takes into account the thicker than stock bracket on our T/A.

http://www.umiperformance.com/catalo...roducts_id=128

And //86\\, it turns out the Moser is 4 short bolts.

The photo here shows the front lower bolt with a 1-1/4 L, 1/2-13 cap screw. I'd imagine a 1-1/2L would be a bit better. The two front holes are "through".

http://i1118.photobucket.com/albums/...6/0a5be7a6.jpg

The two rear holes are blind. The depth is such that the hole plus our bracket plus a washer equals 1.815". I'd try a 1-3/4" for max thread engagement as long as you're sure the bolt doesn't bottom.

With all that said, it seems like Qty 4 of 1/2-13 x 1-1/2 L would be a good place to start on a Moser 12-bolt.

ramey
Old 02-23-2012, 07:15 PM
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Re: tried to search. help.

good to know info. thanks
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