Thanks for the info fellas, The father in law got the driveshaft re-balanced today, and they mad on adjustment on the side that didnt have any weights on it.

Was just wondering, been told that if you have no change in the angle between the trans DS, and pinion, than its bad. Say we move the pinion up to 2.5*, and the trans, DS and pinon bot read ot to 2.5*. From what im understanding from what the guy said, this is the worst thing to have. Doesnt make since to me but does anyone actually know the answer?

 

Yes that's true...having 0 deg at the U-joint (dead center with either the trans or rear end) is indeed bad....Why? because the needle bearings are not able to spin. You should shoot for 1/2 to 3/4 deg minimum difference between DS and trans/ rear

-Gun

 

thanks for the answer, it actully makes sense now that you say it. lol

 

Is it better now?

For some reason, I've developed a big exhaust leak on the right side of my car..... I'm pretty sure you were riding on that side! LOL

 

What you sayin, lol Not my fault you went old school "bullit"style on me, lol

But yep the BVD balanced the DS and i just got the phone call from chad that its almost completely gone. BVD had to put a huge weight on the rear end were there wasnt a weight.

Going outta town for the weekend to go visit family, But we might swing by temple's track tommarrow night. Ill call you sunday to see whats up, maybe we can go for a mini cruise.

Thanks for all the help guys!!!!

 

Please let me know if the weight solved the issue..

 

Havnt gotto takea rifde in it yet, but the father-in-law said he got it to 105-110 without any vibrations yet. Thats on a closed course in mexico=). Thats with an open 2.78 hear

Thinking about putting 3.80s in it, instead of the 4.11s the locker has on the other third member. Ill let yall know for sure only we get some lower gears in it and see how it turns out. thanks

 

Well it sounds like it fixed the problem if it was bad at 90 and now totally smooth at 110.

You gotta answer all these questions for me as best you can!

1) When the vibration started where did you feel it from first? Where did you hear it from?
2) Would the vibration get worse exponentially? as in hardly noticeable at 73mph but twice as bad at 76mph and again twice at 79....By 83mph it felt like something was about to grenade??
3) Would the vibration get worse momentarily when you backed off the gas?
4) what speed did they balance the DS?

Thanks

-Gun

 

Ill double check with the father-in law but heres my best description, lol


When we had the 4.11s in with the locker it would come in at around 63 and double in short speed changes, itwas bangin pretty hard at 70. never got it past 75, the dash and everything started jumping. With the 2.78s with the open diff, it was the same type and everything, except now it came in at around 84ish, and was hard at 90.

And yes when you decelerated it would get worse for around 5mph or so speed drop, then it would level off.

The shop that balanced it said the highest they could spin balance it was 2400 on their machine, the way he talk he said thats as fast as any shop can do it, but not real sure.

hope this helps

 

Did the sound seem to come from the shifter handle? Did the shifter handle vibrate with a profound high speed vibration?

-Gun