Crazy vibs from my 406/700R4 bellhousing.

[rjfguitar]

[ QUOTE ]
Has everyone checked their motor mounts and tranny cross member mounts, if one is cracked or broke the torque of when you accelerate or decelerate will cause everything to bind up and make noise. Just a thought Otherwise it sounds just like a bad pilot bearing.

[/ QUOTE ]
I did break the driver side motor mount one time but replaced it, maybe I should check it again.

Czar, maybe it could be the angle. /forums/images/graemlins/dunno.gif Let me know what you come up with.

 

[Bushwhacker]

I'm runnin a total of 8". ORD flip and block in the rear. My rear driveshaft angle is whats causin mine I think. My pinion is just a couple degrees shy of pointing straight in line with the shaft. I have heard that the slip yoke style shaft is common for causing those noises.

Clay

 

[rjfguitar]

[ QUOTE ]
I'm runnin a total of 8". ORD flip and block in the rear. My rear driveshaft angle is whats causin mine I think. My pinion is just a couple degrees shy of pointing straight in line with the shaft. I have heard that the slip yoke style shaft is common for causing those noises.

Clay

[/ QUOTE ] /forums/images/graemlins/thinking.gif

 

[RingMaster4x4]

mine does this also and I have a np205 with a fixed yoke. now one thing I do know about mine is one of the bolts that connects the transmission to the transfercase is striped out. /forums/images/graemlins/dunno.gif

 

[84_Chevy_K10]

They do make a compound you can put in the hole and install the bolt and it will make new threads. I would try that, it's Permatex, "Stripped thread repair".

 

[RingMaster4x4]

ok I will give it a try thanks

 

[dyeager535]

Every broken flexplate I have seen/experienced/witnessed, mad noise when the engine was put under load at lower RPM's, such as starting at the bottom of a hill and trying to climb it.

 

[Tuff84blaze]

I have had this problem for about 3 years now, I am sure it is caused by my 4" blocks in the back. I don't have my t-case lowered which might help the problem. Anyways I am sure it is just the u-joint angles changing from the axle rap casued by the blocks when I let go and get on the gas.
My jerry rig cure for the last 20,000 miles on the same u-joints is to apply the brake and then let completely off the throttle. However I bet that eliminating the blocks and fixing the angles will cure your problem. /forums/images/graemlins/thumb.gif

 

[zcarczar]

Ok i measured tonight as best i could. Pinion is point up at 9*, shaft sits at 16* and the ouput seems to be pointing down at a 5* angle. so these angles dont seem to be bad enough to make noise, im wondering if maybe the slipyoke is worn enough to cause that noise while coasting.