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Old 04-07-2010, 11:23 AM
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1990 firebird rearend

hi im just wondering what i would have to do to put a ford 9" with a four link in my 1990 firebird thanks

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Old 04-07-2010, 02:29 PM
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why do you want a 4link? are you not going to drive it on the street anymore? the tq arm setup is actually more effective than the 4 link setup, 4 links are great for drag strip and allow easy adjustments and lots of dif setups. but throw that 4link into the corners, and the tq arm will outshine it on both, the stock tq arms have been run in 3rd gen and 4th gens well into the 7s and 9s in the 1/4. the really weak point is the rear of the trans where it connects to, but that has changed also, many companies make crossmember mounted torque arms that eliminate this issue, as well as the flex. you should look around in the after market, they are developing tq arm setups for mustangs & early firebirds 67-81 chevelles & RX7's, since its an all around performer for straight line driving & cornering. the tq arm AKA three link setup.
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Old 04-07-2010, 08:18 PM
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torque arm rearend upgrade

how can i make my torque arm setup hook up better
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Old 04-09-2010, 11:15 PM
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lmao kids amuse me..

well to do something like this under the third gens its gonna cost you mininum around a grand just to get your hands on a rear end that is custom fitted for these cars. before installation and setup costs etc

this gen of these cars is unique totally and nothing else fits under them without MAJOR costs and modification.....

thats pretty much your only option...

any other ones will cost even more dough.....

do a google for third gen f body 9" axle

if you have a couple grand laying around then you can get something like this under the car

if it is wheel hopping on you then you need solid LCA's and traction bars and siffer coil springs

all are sold aftermarket and easily available

check spohn and others that deal specifically with these aftermarket parts for these cars

you can skimp costs on LCA's by welding plates onto your originals.

boxing strengthening them so they dont flex

good luck
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