Quote:
DiabloSport computer tuner is a good investment:
DiabloSport InTune
The Predator model is being discontinued, and the InTune model is easier to use with a laptop (USB drag and drop files, etc). Data log, view, and tune!
My understanding:
Auto trans got the 3.06 rear gear
Manual trans got the 3.91 rear gear
There were some option/year that had 3.73
Remember the transmission gear ratios in the Auto vs Manual are completely different. Look at both 1st gear, and the overdrive gear:
Auto trans ratio : 1st 3.59, 2nd 2.19, 3rd 1.41, 4th 1.00, 5th 0.83, Rev 3.16
Manual trans : 1st 2.97, 2nd 2.10, 3rd x.xx, 4th x.xx, 5th 0.74, 6th 0.50
So an auto in 1st gear might not like a 3.91 rear gear...
3.73 (18”), 3.91 (20”) with manual trans
That's how I understood it as well. Mine came with the 18" wheels and 3.73 gears. Never liked that gear, for some reason it always made me think Cheverolet... 3.91,s I always associated with MoPars. I found the 20's I like, but they also have them in 18" which wouldn't really necessitate a gear change. I don't mind the 18's on the front, they just don't fill the wheel well on the back.
1969 Dart GTS 340
1969 Super Bee X9 N-96
1969 Coronet R/T X9 N-96
2015 Dodge Dart GT
2019 Ram 2500 Big Horn.
Looking for the original block for my Bee. The last 4 are 7449
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