Driveline Vibration

[philo_beddoe]

Ok, but i do know that the slip yoke is well in there, the new dshaft is almost an inch longer than the old one, plenty of grab.

I have a hunch the tranny mount is too thick.

[zieg85]

Ok, but i do know that the slip yoke is well in there, the new dshaft is almost an inch longer than the old one, plenty of grab.

I have a hunch the tranny mount is too thick.

Check to see how centered your fan is in the shroud.  If you are a lot closer to the bottom your engine is tilted and you may be right

[philo_beddoe]

Ok, i never thought of that. Will check..

Just checked, its even all around. Maybe tail end of tranny is tilted on one side....slightly?

[philo_beddoe]

Well, on the way into work this morning I did feel the typical vibe (like an in and out drone), it wasn't very prominent, but it was there (with my 240 lb. simulated pass). My commute to work is 11 miles, which includes about 1.5 miles of hwy. About half way to work I could hardly feel it, then on the hwy it was so smooth, felt like a brand new caddy, no vibe whatsoever. And it was never that smooth w/o the weight on the pass side.

I'm starting to get confused again, what in the world could be warming up AND with the weight on the pass side cause the vibe to totally go away? Or maybe something is not warming up? I'm going to drive with the weight on the pass side for a few days, try to develop a pattern.

[MrFiveOh]

Well, on the way into work this morning I did feel the typical vibe (like an in and out drone), it wasn't very prominent, but it was there (with my 240 lb. simulated pass). My commute to work is 11 miles, which includes about 1.5 miles of hwy. About half way to work I could hardly feel it, then on the hwy it was so smooth, felt like a brand new caddy, no vibe whatsoever. And it was never that smooth w/o the weight on the pass side.

I'm starting to get confused again, what in the world could be warming up AND with the weight on the pass side cause the vibe to totally go away? Or maybe something is not warming up? I'm going to drive with the weight on the pass side for a few days, try to develop a pattern.

Id say drive it until something actually breaks, My vibration drove me crazy but it didnt affect the actual performance of my truck. Eventually i found it though, im sure you will too. Keep giving updates and im sure something will come up.

[philo_beddoe]

That was one theory i was considering. But i get annoyed when things arent perfect. If my dome light burns out, why even drive the truck! Lol

[MrFiveOh]

That was one theory i was considering. But i get annoyed when things arent perfect. If my dome light burns out, why even drive the truck! Lol

I understand that. I know my truck and when the slightest thing changes it bugs until i figure it out.

[philo_beddoe]

Well the pattern is continuing the same. When truck has sat and is totally cold, i get my vibe for a few miles then when i come to a stop or whatever and start back up, it smoothens out like a new caddy. But only with the added weight on the passenger side. I cant make any sense of it.

[VileZambonie]

How are your body mounts?

[philo_beddoe]

How are your body mounts?

Not exactly new rubber, but not rotted out either. How many are there, i'll double check.

[philo_beddoe]

Tranny mount w/o add weight on pass side and with.


This pic is with the added weight, post 103 is without.

[gwcrim]

Id say drive it until something actually breaks...

That's how I feel about my vibration.  I'll get to finding it.  If it goes first?  Hope it's not catastrophic.

[philo_beddoe]

I hear ya, i'm starting to get to that point. But when you find a clue, you have new hope, only to once again go through dissapointment and personal anguish. Lol

[1967KaiserM715]

I think you forgot to post a pic...


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[Rattler12]

You got cheap tires ?   If its there when cold and goes away after a few miles?  Maybe flat spots on the tires from setting then rounding out again when warmed.....??