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Originally Posted by artMBZ
One of the things that all our conversions have in common is the fact that we all fabricated the rear trans mount out of something.....other variations and this one all include eyeballing the stock location of the tranny.
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I thought about this same thing (FWIW, my rear mount is fabricated from a 240 manual rear crossmember) and a couple of months after the swap was complete, put the car up on stands, pulled the driveshaft separated the stub end and directly bolted it, without the flexdisk, to the tranny output spider.
I bolted-in an old center support bearing hoop and used a piece of pipe slipped over the stub shaft to 'extend' the driveshaft axis into the plane of the hoop so that I could determine visually if the driveline was centered in the hoop. While not a perfect tool, the stub a least gave me a pretty good reference line to use in determining if the driveline was misaligned at the back of the tranny.
Vertically it was really close but, it wasn't centered horizontally so I removed the crossmember and reworked the outboard mounting holes so that the output shaft was now centered.
After reassembling, I could not detect any difference in the amplitude or frequency of the vibration.
About 8-10 months after completing the conversion, I bought a running but wrecked 240 manual parts car and had the opportunity to drive it around some
before pulling the 4-speed tranny (there were no unusual vibrations...etc). Upon pulling the transmission, the first thing I noticed was that the outbut shaft on this tranny was 'tight' compared to the one in the wagon. The wagon's shaft almost feels as if the spud nut holding the spider is loose (it isn't)...so, the looseness must be in the splines on the output shaft but only an autopsy will determine this.
Remember, the donor vehicle was in a boneyard and, her center shaft support consisted of one seized bearing and a hoop-shaped piece of steel...there wasn't a scrap of center support rubber to be seen and it was apparent that the car had been driven that way for some time. BTW, it was in the yard because it had been rear-ended, probably while parked on a street (the LR tail light was under the rear window). I only bought it because, at the time, I thought that 4-speeds were ultra
RARE.
Putting that 'new' 4-speed in the wagon became academic after acquiring the Euro 240 with the five-speed...however, it's destined to soon be the replacement tranny for the Euro....if I can EVER finish my a/c job on the SDL.