creeds_247
creed_s247
How can I figure what the gear ratio in each gear of a three speed so I can calcute what gears to run? Because I have a few gears that may work by running in second.
How to figure gear ratios in three speed tranny?
- Thread starter creeds_247
- Start date
-
67Dart273
Well-Known Member
If you can't figure any other way, simply "rig" a way to turn the input---clutch disc, or vise grips and a rag, etc and some way to mark output shaft---yoke
Then just turn and count the input until the output turns once
To be more accurate, count the input until the output turns TWICE or FIVE times, then divide your answer by 2 or 5
Here's a page speculating on ratios
http://www.moparchat.com/forums/showthread.php?t=115907
I really have not paid much attention to 3 speeds. I broke enough Chivvies when I was a kid
Then just turn and count the input until the output turns once
To be more accurate, count the input until the output turns TWICE or FIVE times, then divide your answer by 2 or 5
Here's a page speculating on ratios
http://www.moparchat.com/forums/showthread.php?t=115907
I really have not paid much attention to 3 speeds. I broke enough Chivvies when I was a kid
67GTConvert
Well-Known Member
If you know what year/model the transmission came from then the ratios are listed in various places,sometimes in the owners manual for that particular car,in the factory service manual for sure,and in on different websites that have scanned factory sales literature like this one:
http://www.hamtramck-historical.com/library.shtml
http://www.hamtramck-historical.com/library.shtml
creeds_247
creed_s247
Thank you both very much I think that will give me the info I need to figure it out.
daliant
Befuddled
The A903 3spd is 1st:2.95-1, 2nd:1.83-1, 3rd:1-1. I wouldn't run in 2nd gear though, A manual trans is strongest in high gear (1-1) because all power is transmitted directly from the input shaft straight through to the mainshaft insted of through the countershaft. Running alot of power through 2nd all the time is going to wear things out quicker or break things.
creeds_247
creed_s247
-
