02-06-2023, 11:31 AM
|
 |
Senior Chief
|
|
Join Date: Dec 2010
Posts: 369
|
|
Quote:
Originally Posted by 'ol Pinion head
HD Muncie 3spd was only avail as one ratio transmission as the standard equip trans in GT-37's & GTO's. Nearly all non AC 71 GT-37's, I have info on from the Survey, have 3.55 gearing.
Original AC equip 455 HO stick 233's like Dennis's HO GT-37 & my HO Coupe received 3.31's. Non AC received 3.55's.
When a GT-37 was equipped with factory AC & a 350 2bbl stick or 400 4bbl, the ratio in the original 10 bolt would be 3.23.
|
3.55 gears might explain why, with the GT-37 I had in the late 70's, I could get no better than 15 mpg while commuting 100's of highway miles each week. Mine was a 350 2bbl non-ac 4 speed. Low gas mileage was one of the reasons I sold it as gas was skyrocketing to upwards of $.80/ga!!!! 
|