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Tremec, Top-loader ratios
In my 67 Corvette, I have a 3:36 rear.
At 70mph it is at 3000 RPM...I little buzzy, but liveable with rear exhausts...puts the mild 327" right about at it's torque peak.
On my ERA 289 FIA car I have a Tremec TKO and a 3:54 rear end coupled to a 347 stroker small block.
In 5th gear, ( I think it is the 0.85 5th ) I get 2100 or so at 70mph.
I could not drive that car more than an hour without 5th gear...and I wear foam earplugs on any drive anyway.
First with the Tremec is just too low for my tastes...it hits the rev limiter faster than I can shift...I am not a drag racer, even if I was, this 3:54 rear end may be too low combined with the 3.27 first gear.
Wish the gears were closer, but still had the 5th overdrive.
With side pipes, 4th gear at 70 is LOUD!!!!...5th, is like...relaxed.
I have a mild 347 small block, so it will not pull in 5th, but a big block would I suppose have enough torque.
When you want to run, drop down to 4th, cruise, 5th.
Pete
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ERA 289 #2027
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