A few months ago, I noticed a shimmy at highway speeds. I figured no problem, and got the tires balanced and got a nice new set of Bilsteins. No dice. I then proceeded to rebuild the front, then the rear suspension, still no dice. It just dawned on me this morning that I had to get my driveshaft rebuilt for my 4-speed conversion.

I had to pay an arm and a leg for Driveshaft Specialists (same place RLeo went to) in San Antonio to do it, and didn't think anything of the balance until this morning. There are washers welded to the side, so I know they at least tried to do it, but I swear I can hear the thing wabbling down there when I am driving.

I am trying to think of a way to know for sure, but the driveshaft place in town won't touch it. Other than getting the butt in the air and getting the DS up to 70mph, I can't think of anything. That sounds like it could be pretty dangerous to me though.

Can you guys think of anything else I should check before making a beef with the DS place?

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My Primary Driver - '85 300CD - 4-speed conversion, 2.47 rear, lowered, euro headlights, rebuilding (not restoring so much)

Wife's - '08 Saab Sportcombi Aero

Riding a '03 Yamaha Warrior

Check your flex disks and center support.

also- it may be possible to do a balancing in the driveway. get 2 hose clamps that fit the DS tightly. mount them with the screw drive portion 180* from each other. move them closer together on one side, if it gets worse then move the other way. if it is only a lil bit off, this may work.

did you make sure the 2 pc are indexed together right?

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1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.

I never did take them apart from when they were shipped back to me. They should have been indexed when I got them.

I will have the car in the air this morning so I will check the center stuff.

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My Primary Driver - '85 300CD - 4-speed conversion, 2.47 rear, lowered, euro headlights, rebuilding (not restoring so much)

Wife's - '08 Saab Sportcombi Aero

Riding a '03 Yamaha Warrior

While your there checking the center support, make sure it is in it's natural position in which the adjustment is not too far forward or back. That could cause vibration issues also.

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1983 123.133 California
- GreaseCar Veg System

Interesting, I have to admit, I just "stick it up there and bolt it down"(up) Next time I'm under my car I will check that. thanks

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

I seem to recall AD cautioning rolling the auto back and forth on it's wheels
(to "Settle" the driveline in ?) before finally torquing everything down.

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'84 300SD sold
124.128

The center support is mounted in the middle of the bracket. The flex disks look healthy, the trans mount is trashed so I am going to get another one of those on my next parts purchase (along with engine mounts).

Which positions are the ends supposed to be indexed to each other? I looked the other day, and they are not matched, they are also not spaced half way in relation to each other.

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My Primary Driver - '85 300CD - 4-speed conversion, 2.47 rear, lowered, euro headlights, rebuilding (not restoring so much)

Wife's - '08 Saab Sportcombi Aero

Riding a '03 Yamaha Warrior