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clinebarger · 05-19-2015, 08:21 PM

4L80E's vary in length, 31 3/4", 32 3/4" & 33", The 33" versions are Roller Output with a parking brake, The 32 3/4" is the one you want (It accepts a Slip Yoke), 31 3/4" is the standard Bolt-On yoke version. (These are lengths I got online)

Does your TH375 have a 9" extension housing? If so, The trans will be roughly 33 1/2" long (Online reference)

As others stated, You need to measure the driveshaft length when you get the Engine & trans mounted, Otherwise we are all shooting in the dark!

It won't take 30 days to get a DS built..3 days tops. It only takes a few hours to test a trans thoroughly.

Wreaking yards are SCUM, Check out the unit before installing it! Fluid condition & debris amount it the pan tells you a lot about an auto transmission. If that checks out, Throw it in & run the crap out of it!

4L80E's are stout units, However most of them get worked HARD, It is not unusual for them to be worn pretty good at 150K if they were pulling trailer all their life, On the other hand they are 400K mile units if not worked hard.

05-19-2015, 08:21 PM	#16
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: driveshaft options 4L80E's vary in length, 31 3/4", 32 3/4" & 33", The 33" versions are Roller Output with a parking brake, The 32 3/4" is the one you want (It accepts a Slip Yoke), 31 3/4" is the standard Bolt-On yoke version. (These are lengths I got online) Does your TH375 have a 9" extension housing? If so, The trans will be roughly 33 1/2" long (Online reference) As others stated, You need to measure the driveshaft length when you get the Engine & trans mounted, Otherwise we are all shooting in the dark! It won't take 30 days to get a DS built..3 days tops. It only takes a few hours to test a trans thoroughly. Wreaking yards are SCUM, Check out the unit before installing it! Fluid condition & debris amount it the pan tells you a lot about an auto transmission. If that checks out, Throw it in & run the crap out of it! 4L80E's are stout units, However most of them get worked HARD, It is not unusual for them to be worn pretty good at 150K if they were pulling trailer all their life, On the other hand they are 400K mile units if not worked hard.