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Topic: 85 TC rear end question (Read 1413 times) previous topic - next topic

85 TC rear end question

Is the rear end in a 85 Turbo Coupe 8.8? And Will it work in my 87 Bird?

85 TC rear end question

Reply #1 –
It is not an 8.8 but it will work in your 87 I believe there is a slight  difference in width
Fox-less at the moment

85 TC rear end question

Reply #2 –
The '85 has a 7.5 and it should have 3.45 gears (quads and Traction lock as well). I had one for a few years under my last Bird. No, they're not as strong as the 8.8, but it did well, never gave me any issues at all.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

85 TC rear end question

Reply #3 –
As long as you're not running slicks or drag racing heavily the 7.5 should be ok. I'm running a 7.5 but I know slicks + 7.5 = broken spider gears/rear end.

Someone on here has a blown 87 XR7 5.0 car with a 7.5. He's got some heavy work into the rear though.
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.

85 TC rear end question

Reply #4 –
I think that's V8Demon you're referring to. He's got an Eaton diff or some aftermarket diff that solves the spider gears problem. I think that's the only mod he has in the 7.5 as far as I know. Hopefully He'll chime in. He's in the 12s with that car too from what I remember.
home ported E7's, HO intake, 93 Tbird cam, 65mm tb, Shorties, dynomax lers, TC 3.73 rear, Mach 1 springs, Bauman shiftkit, epoxy mod, SD, 3G alt, black magic fan
 

85 TC rear end question

Reply #5 –
Ok next question what make a rear end quad link.