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Old 04-23-2016, 05:32 PM   #36
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You should have just bolted the motor and trans as a hard mount. Then you could have enjoyed the full effect of every cylinder. Lol

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Old 04-23-2016, 05:33 PM   #37
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Yesterday i saw that it had the rubber pad on the mount. It was in the best of shape, is that what you are talking about?
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Old 04-23-2016, 05:49 PM   #38
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Yesterday i saw that it had the rubber pad on the mount. It was in the best of shape, is that what you are talking about?
Yes that's good

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Old 04-23-2016, 06:18 PM   #39
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Okay so ill be checking the driveshaft tomorrow and ill let you know the update
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Old 04-26-2016, 09:26 PM   #40
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So I flipped the driveshaft 180 and it seemed to do better the first test drive, then the second drive it was the same as before. Tommorow I am removing the pinion flange to get to the bearing
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Old 04-27-2016, 05:24 AM   #41
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there should be a couple yellow marks on the driveshaft that line up with a yellow mark where you bolt the driveshaft. thats the factory balance. i put it on wrong when i did my u joints. as for the grease smell, your probably slinging grease under your car as you drive with the excess grease seeping from the u joints. this is relatively normal. the centrifigal force is doing this. it will go away with time, but i had lines of grease above my u joints.
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Old 04-27-2016, 07:13 AM   #42
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My driveshaft is pretty rusty, I didn't see any color on it. Would I be able to sand on it to see if the yellow shows or should I keep turning the driveshaft one bolt on the flange at a time till I get it in the right spot. Also, if it is a bad pinion bearing, how many ft/lbs do I torque the new bearing and crush sleeve?
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Old 04-27-2016, 07:17 AM   #43
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My driveshaft is pretty rusty, I didn't see any color on it. Would I be able to sand on it to see if the yellow shows or should I keep turning the driveshaft one bolt on the flange at a time till I get it in the right spot. Also, if it is a bad pinion bearing, how many ft/lbs do I torque the new bearing and crush sleeve?
Measure where the nut sits before you remove the pinion bolt. Put it back exactly where it came from. You do not want to over tighten and destroy the crush washer. The nut will tighten down.

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Old 04-27-2016, 07:28 AM   #44
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When i went to replace my ujoints i noticed the pinion gear was loose so i tightend ot with a breaker bar as tight as i could with a screw drive holding the flange. So im not sure of how it was suppose to sit. Also, it has a bad vibration now and it didnt have one when the pinion gear was loose
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Old 04-27-2016, 07:34 AM   #45
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When i went to replace my ujoints i noticed the pinion gear was loose so i tightend ot with a breaker bar as tight as i could with a screw drive holding the flange. So im not sure of how it was suppose to sit. Also, it has a bad vibration now and it didnt have one when the pinion gear was loose
You may likely need to pull the entire assembly apart again to reset the gears. I'm not certain on that one. I will need to be educated myself.

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Old 04-27-2016, 08:01 AM   #46
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Okay, can i replace the crush sleeve without removing the assembly?
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Old 04-27-2016, 08:49 AM   #47
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Okay, can i replace the crush sleeve without removing the assembly?
That is a great question. I am going to keep a check on this thread to learn from someone with much more knowledge than myself.

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Old 04-27-2016, 01:38 PM   #48
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Yes you can but I don't know the torque on the crush sleeve just google it had to do my pinion seal just put the bolt back where it was but since you cracked it down you need to know the torque for the bolt


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Old 04-27-2016, 04:14 PM   #49
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I took driveshaft out, took ujoints back out and checked to see if the needle bearings were good. They looked good, so i put the driveshaft back in. I test drove it for about 5 mins and had almost no vibration. Then when i let it sit for 20 mins i took it out again and it started to vibrate hard again
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Old 04-27-2016, 04:28 PM   #50
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Also the shaft in the trans that the driveshaft goes onto was fairly loose. Is it normal for playbin that shaft?
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Old 04-27-2016, 05:49 PM   #51
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Also the shaft in the trans that the driveshaft goes onto was fairly loose. Is it normal for playbin that shaft?
No, you should not have play in the tail shaft of the transmission.

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Old 04-27-2016, 07:28 PM   #52
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What do you mean by play side to side in and out look at the splines on the drive shaft and tail splines of the tranny make sure there not messed up


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Old 04-27-2016, 07:35 PM   #53
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There is usually a little bit of play in the transmission output shaft.
I recommend searching YouTube for some videos on replacing the gears in a 8.8 rear end. There should be instructions for installing the pinion and setting the preload on the bearing.

If you want to try to positively identify the source of the vibration, you can put the rear end SECURELY on jack stands, and have an assistant start the engine, put the car in drive, and get the drive train spinning at the speed where the vibration occurs. CAREFULLY get under the car and listen and feel around for anything that sounds or feels abnormal.
l feel fairly certain that you will find the problem is with the pinion.
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Old 04-27-2016, 07:35 PM   #54
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The splines seem like they are okay. Is there anything I can do to tighten it up? what would cause the shaft to be loose?
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Old 04-27-2016, 07:56 PM   #55
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The splines seem like they are okay. Is there anything I can do to tighten it up? what would cause the shaft to be loose?

No need to the splines are good then your good like straybullit said some play is fine do like he said and find what's causing the vibration


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Old 04-27-2016, 08:09 PM   #56
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I was wiggling the tailshaft with my finger and it has got quite a bit of play in it and the vibration is coming (it seems like) right at the trans. It shakes the seats and especially the dash. that's why I was thing maybe a tailshaft bushing?
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Old 04-27-2016, 08:16 PM   #57
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Whine noise.. U Joints?

Make a video of the play could be the tailshaft


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Old 04-27-2016, 08:24 PM   #58
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Ill try to make a video of the play tomorrow for you
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Old 04-27-2016, 08:45 PM   #59
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The output shaft has some play when the drive shaft is removed.
And remember, the hollow drive shaft is an excellent conductor of noise and vibration. It will transmit sound and vibration from one end, right through the other.
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Old 04-27-2016, 10:08 PM   #60
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Now this issue has gotten me so frustrated and confused. Sometimes the vibration will be very light even at 60-70 MPH then sometimes it vibrates around 45-50 like hell
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Old 04-27-2016, 10:14 PM   #61
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There was a small ding in the driveshaft and I mean SMALL. It was as small or even smaller than a penny, could this cause vibrations?
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Old 04-28-2016, 12:06 AM   #62
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Possibly. But, typically, when a drive shaft is out of balance it will begin vibrating at a certain speed, and the vibration will continue as the speed increases.

Does the ding look like it was caused by a small rock flying up and hitting the drive shaft?
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Old 04-28-2016, 12:47 AM   #63
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Yes, It actually starts vibrating at exactly 45 or 50 MPH everytime and it stops when I slow down and it goes below that speed.
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Old 04-28-2016, 12:57 AM   #64
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I think that it is unlikely that is your problem... Out of balance drive shafts don't make whining noise.

Get the rear end SAFELY up on jack stands, and try to figure out where the noise/vibration is coming from.
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