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Manual Drive shaft with auto rear diff?

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Old 02-01-04, 10:58 AM
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Manual Drive shaft with auto rear diff?

Can you make the auto Companion flange work with the manual drive shaft? I think I read somewhere on here you can drill a new set of holes in it. Anyone tried anything like this? The auto driveshaft is 12mm longer maybe an aluminum spacer would do the trick?
Old 02-02-04, 10:29 PM
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bump.
Old 02-02-04, 11:38 PM
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See here for the 5/25/01 entry (about 1/3 down the page)

http://beyondtheredline.fd3s.net/fd3s_blue.html
Old 02-03-04, 05:58 AM
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Thanks,
Old 02-03-04, 08:33 AM
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yes but where would you buy such a thing, he posted no useable measurements...
Old 02-03-04, 10:14 AM
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Ok, from personal experience, ~5K miles, and numerous hard launches...... Manual drive shaft will work with the Auto Diff. The length DOES NOT really matter, I really didn't notice much of a difference on length when they were bolted in there. You could tell a minor difference when laying side to side but not much at all.

The driveshaft has a cricular ridge that you set in the auto driveshaft so It stays aligned. You then just drill new holes and bolt her on. Will work fine till you get the money for a manual diff. Don't be scared to get on it either. I recall numerous street launches with that thing on.
Old 02-03-04, 11:55 AM
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Do you have the manual diff now? If so, how much difference did it make?
Old 02-03-04, 12:00 PM
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Originally posted by 93BlackFD
yes but where would you buy such a thing, he posted no useable measurements...
I think the spacer would need to be 12mm thick ( the difference of the two drive shafts). You could get the diameter off the flange. And use the flange and drive shaft as a template for the holes.
Old 02-03-04, 12:18 PM
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Just for fun I priced the manual diff flange, it is $98.34 at
Malloy.
Old 02-03-04, 12:33 PM
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Hell I would get the manual diff flange... It was a pain to drill those damn holes in all honesty

And there really isn't a difference other than noticeable RPMS changes, and off of a dead stop.
Old 02-03-04, 04:56 PM
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Was your acceleration alot better with the 4.10s? Or not really much different?

Last edited by BRADYMAHONEY; 02-03-04 at 04:58 PM.
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