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Driveshaft Vibs

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MUD CHILD

Re: Driveshaft Vibs
« Reply #15 on: December 07, 2007, 09:29:28 AM »
Some good info here as I am going to do mine shortly
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kingzoo

Re: Driveshaft Vibs
« Reply #16 on: December 07, 2007, 11:56:22 AM »
   I filled the rear diff on my surburban because the fill plug wouldn't come out.It worked,but it took forever.
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Offline bentparts

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Re: Driveshaft Vibs
« Reply #17 on: December 07, 2007, 01:12:57 PM »
Yeah, I can imagine it's slow that way. Gear lube aint exactly easy to pour to begin with!
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kingzoo

Re: Driveshaft Vibs
« Reply #18 on: December 07, 2007, 01:20:57 PM »
   I use 90w and heavier lubes in firetucks everyday and got tired of pumping a suction gun.I bought a heated pump at NAPA for about 90 bucks and I love it.Just put a gallon of lube in the bucket,plug it in and five minutes later it takes about 30 seconds to pump it all.
   I love the person that came up with that one.
  The chain style transfer cases are easy cause they mostly use tranny fluid.
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Offline sidekicksrock

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Re: Driveshaft Vibs
« Reply #19 on: December 07, 2007, 08:20:55 PM »
Quote
Is it possible to fill thru the vent tube? That's what I thing I'm gonna try.

That's a good idea, Only thing I would do is stick the gear lube bottle in a pot of boiling water for about 5 minutes before you try to run it through that little hole. Of course if you go through the vent hole there will not be a way for air to leave the case as it fills. One way to do it would be to run the tube on the axle through a T, put a vacuum pump on one side and a petcock on the other line which goes to a funnel or the bottle. Pump up the vacuum in the axle then open the axle and let the vacuum suck the gear lube in.

Or you can pull an axle, jack up that side and pour the lube in that way.

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Offline Mikerpm4x4

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Re: Driveshaft Vibs
« Reply #20 on: December 07, 2007, 08:26:50 PM »
Quote from: bentparts on December 07, 2007, 05:20:16 AM
MikeRPM, Question: How do you now fill the rotated rear diff? I jacked the rear of my Tracker up as high as I could while leaving the front on the ground, and still could not get the fill hole high enough to not have the lube coming back out. Is it possible to fill thru the vent tube? That's what I thing I'm gonna try.

Ive done it a few different ways. I backed up on my trailer and up on some blocks I had on the trailer.
I put the back on a drive on hoist and lifted it up. Drove the nose into a ditch... just stay away from this guy :police:
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Offline bentparts

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Re: Driveshaft Vibs
« Reply #21 on: December 08, 2007, 04:53:34 AM »
Mike, I'm going to refer you to OHSA's jobsite saftey manual. hahaha, All the rest of you guys, good tips on the filling. I can't seem to post my photos of the completed job, the file is " too big." I put them up on www.flickr.com/photos/bentparts. Under rear mods.  Mike, would there be any advantage, other than satisfying my impulse to correct things visually and make a big mess, to re locating the rear upper coil mount to have the coils sitting straight up and down after the rotation? I'm thinkin' ( oh no, look out) they may work smoother that way. 
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ZUKTOY

Re: Driveshaft Vibs
« Reply #22 on: December 08, 2007, 08:09:02 AM »
I let the gear oil sit in front of a salamander heater for a couple minutes. It's usually on in the winter anyways. Put it in front of the diffs for a few minutes and it poors out quicker too.
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Nine Pine

Re: Driveshaft Vibs
« Reply #23 on: December 08, 2007, 08:37:18 AM »
   Bentparts,
   You stated that you did a test drive with your homemade 1/2" driveshaft spacer and encountered serious vibrations. Next you tried a bigger spacer from Rocky Road, problem solved. What do you mean by a bigger spacer? Diameter, thickness? What size is the spacer you are running now? I assume this is an aluminum spacer.

   I have never had much faith in driveshaft spacers, although I have never run any either. On all the suspension lifts I have done I always measure the slip yoke position in the transfer case before and after the lift. Then I take the driveshafts to Bay City Joint, Clutch and Gear (local shop about 30 miles south of me) and have them lengthen the driveshafts. They do this by cutting the old tube out, at the welds on the u-joint. They then weld in a new tube that is of the correct length (longer). This shop even has the capability to spin balance the shafts. They weld on weights to the tube. You get back a proffesionally balanced shaft. It has been a couple of years since I have had a shaft lengthened, but at the time it was well under $200 dollars a shaft. It is actually less than that if you deduct the cost of new bolts and cost of the spacer. Confidence in your equipment has got to be worth something too.

   Sincerely,
   Nine Pine
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Offline bentparts

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Re: Driveshaft Vibs
« Reply #24 on: December 08, 2007, 02:37:16 PM »
Original Spacer was 1/2" thick, RR spacer is 3/4" thick, and machined on both sides to match the faces of the driveshaft flange and rear diff input flange. It's fit is perfect, and I don't have any problem using one. Cost $25 with hardware.
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Offline Uncivilized

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Re: Driveshaft Vibs
« Reply #25 on: December 09, 2007, 01:33:10 PM »
A thicker spacer will change the angles of the joints.
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Offline bentparts

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Re: Driveshaft Vibs
« Reply #26 on: December 09, 2007, 04:22:26 PM »
Quote from: Uncivilized on December 09, 2007, 01:33:10 PM
A thicker spacer will change the .
angles of the joints
  If that's the case, I may just have stumbled upon the correct angles. I just got back from my second long test drive and was cruising at 75mph and about 4400 rpm, and it was quite smooth. Yesterday I had it out on the trails, and got to use my 4 low. It climbed down a gully, thru a creek with about 14" of water, and up a muddy steep slope with nary a bit of throttle. That's the Sh#%!
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Offline SnoFalls

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Re: Driveshaft Vibs
« Reply #27 on: December 09, 2007, 05:33:59 PM »
ya, 4.24 gears are awesome aint they  ;D
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Nine Pine

Re: Driveshaft Vibs
« Reply #28 on: December 09, 2007, 06:48:54 PM »
   Bentparts,

   Thanks for the response. I thought you were talking thickness, but was not certain. Sounds like you have this thing going your way now. I was just expressing a personal preference concerning driveshaft spacers. Like I had said, I have never run them. If you like them and are satisfied, I can respect that. Happy motoring.

   Sincerely,
   Nine Pine
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Offline Mikerpm4x4

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Re: Driveshaft Vibs
« Reply #29 on: December 09, 2007, 09:08:00 PM »
Quote from: bentparts on December 08, 2007, 04:53:34 AM
Mike, I'm going to refer you to OHSA's jobsite saftey manual. hahaha, All the rest of you guys, good tips on the filling. I can't seem to post my photos of the completed job, the file is " too big." I put them up on www.flickr.com/photos/bentparts. Under rear mods.  Mike, would there be any advantage, other than satisfying my impulse to correct things visually and make a big mess, to re locating the rear upper coil mount to have the coils sitting straight up and down after the rotation? I'm thinkin' ( oh no, look out) they may work smoother that way. 


Did you see the part about relocating the lower coil pockets? After that is done it should be pretty dang close.
http://zukiworld.com/month_100102/images/hagen/remove.jpg That being said I have cut off the uppers and dropped them an inch and rearward 2 inches on my old orange rig.
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