The issue is the front prop, not the rear.. There are two fixes.. 1. (the simpler of the two).. Lower the nose of the engine by about 25mm. This will get rid of the rattle... 2. Using a jig, have the nose of the diff tipped up and then put the front prop out of phase...
The vibration is caused because the front diff flange is not parallel with the transfer case front output shaft. As a prop is turning at a given speed, the center tube and splined section between the two yokes is actually accelerating and decelerating once with each revolution. As long as the shaft joints are in phase and both mating faces are parallel this is not a problem. When mine arrived, and was standard it rumbled a little, but not a lot compared to the 101 I owned in the UK. The front prop had been modified. They'd removed the wide angle joint at the top which lessened the rumble. I think if the engine was dropped a small amount (the rad cowl re drilled to suit) and both joints on the front prop changed for the std angle (series type) joint, the rattle would all but go.. Just my thoughts.. With the rear diff nose lifted and the modified 110 rear prop on the front I have no rattle.
1995 Mercedes 1222A 4x4
1969 (Now know! Thanks Diana!!) Ser 2 Tdi SWB
1991 VW Citi Golf Cti (soon to be Tdi)
'When there's smoke, there's plenty of poke!!'
'The more the smoke, the more the poke!!'
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