I had a set of 3.73's with 26" tall tires and on the highway I hated it. 3400 rpm at 65 mph for long stretches is just a bit hell on the driver. At least this driver anyway.
I opted for a set of 3.31's as a replacement behind the factory th400 and it's much nicer. It's kind of amazing what only about 400-600 rpm will do for your comfort. The 3.31 to 3.55 range also works well with a lot of OD transmissions, from the 4l80, to many of the manual offerings.
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-Jason
1969 Pontiac Firebird
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