Quote:
Originally Posted by 70GS455
Go .68 OD. If you're concerned with lugging the engine, drive faster before you shift, or just stay in 4th (No different from what you have now) longer. Then you have the extra OD for those times that you need to cruise on the interstate.
If you get the .81, juggling shift points will be of little benefit if you ever need the extra OD.
Recap - with the .68 you can always delay the shift into 5th.
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He doesn't cruise on the interstate. Did you actually read the post from the start.? Did you watch Formulajones video. Most of us don't drive like that..!!!
Here is his post. ( O/P)
(Most of my " normal" driving is around town,55 mph and 65 mph. The 2.87 first gear is appealing to me as much as having the overdrive. I will admit I'm not much of a putt putt. The car has its original drivetrain but I put it through its paces. Have been since 1986.)
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 3:90 gear. 28" slick.
Best so far 9.95@135 mph. 1.39 60 ft.
76 Trans am, TKX .81 o/d, 3.73 Moser rearend,
468 with KRE D-ports, Doug headers, 3" Exhaust
950 Quickfuel.
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