4 lug rear disc swap

blackvert · 09-04-2006, 10:19 PM

curious how many of you are running the thunderbird turbocoupe rear discs in your fox bodies...what was needed to complete this swap. I have an 87 TC rear with a good posi and 3:73 gears.....

coupe · 09-05-2006, 08:06 AM

Man, that setup is a bolt-in affair, except you must drill quad-shock mounting holes a little lower in the bracket on the turbocoupe rearend. The quads are a bit longer on the fox and if you attach them to the TC mounting location, the rearend of the car sits way up in the air...geometry's off.

I think the brake line even just threads-in and you're connected. But you may need an adjustable brake-proportioning valve to fine-tune the bias from front to rear.

QWKSNKE · 09-05-2006, 08:48 AM

Quote:

Originally Posted by coupe

Man, that setup is a bolt-in affair, except you must drill quad-shock mounting holes a little lower in the bracket on the turbocoupe rearend. The quads are a bit longer on the fox and if you attach them to the TC mounting location, the rearend of the car sits way up in the air...geometry's off.

I think the brake line even just threads-in and you're connected. But you may need an adjustable brake-proportioning valve to fine-tune the bias from front to rear.

+1. Buy some aftermarket upper/lower control arms and don't install the quad shocks

86GT · 09-05-2006, 05:57 PM

I am currently running the T-Bird setup on mine. I wanted to keep the factory axel length so I bought the brackets from NorthCobras and then bolted everything else up.

I did have to redrill the shock mounts over a tad. I have an atricle that I wrote on the process.

http://webpages.charter.net/eecanaly...akeUpgrade.pdf

09-04-2006, 10:19 PM	#1
blackvert Junior Member Join Date: Sep 2006 Posts: 2	4 lug rear disc swap curious how many of you are running the thunderbird turbocoupe rear discs in your fox bodies...what was needed to complete this swap. I have an 87 TC rear with a good posi and 3:73 gears..... __________________

09-05-2006, 08:06 AM	#2
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Man, that setup is a bolt-in affair, except you must drill quad-shock mounting holes a little lower in the bracket on the turbocoupe rearend. The quads are a bit longer on the fox and if you attach them to the TC mounting location, the rearend of the car sits way up in the air...geometry's off. I think the brake line even just threads-in and you're connected. But you may need an adjustable brake-proportioning valve to fine-tune the bias from front to rear. __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

09-05-2006, 05:57 PM	#4
86GT Member Join Date: Mar 2005 Location: Sacramento California Posts: 449	I am currently running the T-Bird setup on mine. I wanted to keep the factory axel length so I bought the brackets from NorthCobras and then bolted everything else up. I did have to redrill the shock mounts over a tad. I have an atricle that I wrote on the process. http://webpages.charter.net/eecanaly...akeUpgrade.pdf __________________ EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more.