Drive line issues - need some ideas

[frdfver]

The driveshaft specialist you talked with may know how to weld shafts together but I believe he gave you some bad info on driveshaft angles. I defiantly wouldn’t set the driveshaft level with all the adjustment coming out of the pinion. As stated by Dan and Jerry you need to check the angles on both the trans and pinion and work from there. As stated before there are a lot of trans yokes out there, mine included that have clearance reliefs in them. Link below to a simplified way to set up. Set up the angles then see if it still binds, grind clearance reliefs in it and if it vibrates take it out and have it balanced.

Drive Shaft Harmonics

Paul T.

[mjhcobra]

I have put an angle finder on both the pinion and the trans and both are about zero degrees. So herein is my problem-I cannot lower the trans without seeing the sidepipes drop. The only adjustable option is the pinion. I considered shorter springs on the rear to raise the rear axle, but then the tires will hit the fenders.

The "specialist" said that I could dish out the yoke for clearance, but he guaranteed tremendous vibration unless I can get the drive shaft "closer to level" (his terms). Keep in mind that both angles are close to zero degrees, so they are in the proper relationship with each other-there is just to much height difference with this short little drive shaft.

Everything I have done is by the numbers per EM's manual. EM even welded the brackets on the rear end as well as all the mounts on the frame.

Unfortunately, there are not many EM owners that have the same set up as I do that can offer help.

I almost lowered the trans mount 1.5" this weekend, then I noticed what it did to the sidepipes. I tried to loosen all the sidepipe bolts for max "lift" but this did not work.

I have actually considered a CV joint, but only a thought.

Using the shorter pinion yoke would help a little, but then I need a new drive shaft.

You would think that there is something obvious wrong here, but it just isn't obvious yet.

Thanks for the continued ideas-but with the trans mount "fixed", my options are limited.

Martin