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Discussion Starter · #1 ·
Finally got the T-Bird SC rear clip completely taken apart (what a PITA) and cleaned up. Thanks Rodney for loaning me a few tools. Almost had to use the Sawz-All on that [email protected] T-Bird subframe!

Anyway, I've located a local guy to rebuild the 8.8 pumpkin who works for one of the Nascar Winston-Cup teams and used to work for Ford Motor Sport. So, needless to say, he knows his Fords.

I'm having him do a complete rebuild (seals, trac-loc, pinion bearing) on the 8.8 pumpkin and am trying to decide about gears. I have the 3.27 gears and trac-loc already and have been combing the archives late tonight for information. My plan is to run a stock donor 5.0 EFI with a T-5 for starters until the motor gives up then maybe progress to a stroker kit during the rebuild.

I find lots of people jumping from 2.73 and 3.08 gears to 3.55 gears with lots of success. But, I don't see the anyone touting a big difference or cost justification to go from 3.27 to 3.55

That said, I'm thinking about either going to 3.73 gears or just not changing the gear ratios at all. The car will be mainly be street driven on good weather weekends. While I'd like to carry on a conversation going down the highway (lower gears concern me with higher RPMs), I also want the Cobra to feel quicker than my daily driver M3 (0-60 in low-mid 5 secs).

Recommendations? I've thought about keeping what I have and trying it out, but since the differential is apart now is the time to decide.

Thanks for the input.

Drew
FFR????
 

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Discussion Starter · #16 ·
Thanks for the insights guys. Since this is going to be my weekend car (toy according to the wife), the higher 3.73 gears sounds like a feasible and cheap performance modification(relative to engine mods) to get faster acceleration on a stock 5.0 engine. I would guess that <30% of my driving time will be spent on the interstate, so I'll just have to tolerate the higher rpms when on the interstate.

While I was really hoping for some concensus on the ratios, it seems like many people find that the 3.73 cause the car to spin the tires, but I presume from your comments in that this only happens if you press the accelerator all the way to the floor.

So, I'll probably get my mechanic to install the 3.73s, but I'll keep the 3.27s if I ever want to swap back should I do a stroker motor build down the line.

His price for the 3.73s is about $175 for FMS products, which is about $25-$30 higher than most places but I guess its worth it as he'll warranty it with his own parts.

Drew
FFR????
 
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