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Old 12-17-2001, 10:26 PM
Dave McDonald
Posts: n/a
'83 Merz 300TD transmission

Looking for insight into taking a auto trans. from my '81 300SD and installing it in my '83 300TD. I've been told if I change the tail shaft (going from elec speedo to gear) is all I need. I'm unsure. Anyone know??? Thanks! Dave
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Old 12-18-2001, 02:14 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,123
In a prior thread, Steve told me that you need a seal of some sort that isn't an easy thing to retrofit. But maybe that was installing a TD tranny in an SD.

It can be done because my 81 SD came to me with a 280E tranny and now it has a 300D tranny. I didn't swap tail housings, I got them that way.

91 300SE
81 300SD
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Old 12-18-2001, 05:54 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Changing from manual speedo(rear cover & drive) to electronic isn't a big deal, just swaping the drive & rear cover, However going from electronic drive to manual can be a problem, as the manual speedo drive needs a lubrication port for the drive gears & the electronic trans isn't set-up for this lubrication port!
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Old 12-18-2001, 06:10 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,123
So I have a lousy memory. Sorry about the misquote. MBDoc.

91 300SE
81 300SD
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