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Old 07-05-2022, 10:37 PM   #3
Rory McNeil
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Join Date: Jun 2007
Location: from Vancouver BC Canada, now in Nova Scotia
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Default Re: th350 gear ratio check

Quote:
Originally Posted by Charles Stewart View Post
No answer after 275 visit ???
I may be completely wrong with that and I never played with an auto transmission but I will try a tentative solution here.
The standard gear set for a TH 350 is: 2.52, 1.52, 1 to 1 or 2.75, 1.52, 1 to 1. That means if you put your trans in first gear and turn the input shaft 2 and a half rotation (2.52), the output shaft should turn one rotation and so on (1.52 and 1 of rotation for the input shaft, for the second and third gear, should give you one rotation for your output shaft).
You can make a tool with an old trans yoke and work on the output shaft side. Make 1 turn from your output shaft and count the rotation of the input shaft.
I repeat, I may be totally wrong but it’s the way I see it.
Although that method works with a manual transmission, it won`t work with an automatic. You can turn the tailshaft until your hand falls off, but it won`t rotate the input shaft.
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