Hiya Uncle Old Duke,
Sorry to go on so earlier.
" ... incorrect installation with the rotating flanges driving into the narrow section of the guibo. Easy to do if one does not understand the shaft rotation or gets confused while working upside down under the car.
I've also found the out flange on three M47s was loose or barely finger tight. A whip chain wrench as counter hold to tighten the M47 output flange to torque.
So, here is a page that shows orientation from turbobricks:
http://forums.turbobricks.com/showthread.php?t=187829
And referenced on the turbobricks page is:
http://www.bokchoys.com/differential/diy_guibo.htm
In short, there is a giubo front and rear install orientation. The transmission output flange hardware secure through the three deeper, or thicker, holes on the giubo.
And I actually got the bolt-up orientation reversed the last time I did it, yet before applying final torque. Front to back was fine. Too much earl grey tea early that morning in 2012 or 2013.
I'm going to dive under the 1990 today or so, you see in the images, to realign the stupid exhaust from vibrating on the center support carrier bushing housing.
Then dive under the 1992 240 GL.
Cause I'll be driving to CO state it seems. Cheaper than shipping two 240s this time.
Hope that helps.
Happy Ruby Tuesday!
Buttermilk MacDuff.
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