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Old 07-18-2012, 12:43 AM   #1
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Got scared

I recently installed a RK 3.5 mid arm lift (actually got 4.5) and accompanied it with a JE Reel front driveshaft. I greased the U joints as per instructions and after about 50 miles on the driveshaft my oil change light came on. I crawled under to drain the oil and I noticed what I thought was initially front pumpkin oil but it was grease from lubing the U joint. I did pump a lot of grease in the driveshaft but it slung all over my LCA'S and everything else in the way. Has this happened to anyone else? There aren't any seals that are bad I guess it was just grease coming out of the vent hole in the driveshaft when the shaft compressed. Does this sound normal?

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Old 07-18-2012, 01:05 AM   #2
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U-joints take very little grease, just a pump with grease gun is plenty most of the time .
Sometimes if you want ,you can "Purge" the u-joints by pumping lots of grease into each one ,this forces the old grease and wear particles out around the rubber seals.
You might want to do this if you go thru mud holes or deep water...
Make sure you take a rag or paper towel and wipe up all the excess, or you will have a big mess.
If you look closely while you pump the grease gun, you will see the rubber seals start to expand....STOP. Good luck ! "BH"

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Old 07-18-2012, 04:10 AM   #3
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Quote:
Originally Posted by Baby Huey View Post
U-joints take very little grease, just a pump with grease gun is plenty most of the time .
Sometimes if you want ,you can "Purge" the u-joints by pumping lots of grease into each one ,this forces the old grease and wear particles out around the rubber seals.
You might want to do this if you go thru mud holes or deep water...
Make sure you take a rag or paper towel and wipe up all the excess, or you will have a big mess.
If you look closely while you pump the grease gun, you will see the rubber seals start to expand....STOP. Good luck ! "BH"
He nailed your answer 100%.
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Old 07-18-2012, 04:30 AM   #4
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So once you see the seal start to expand you should stop correct?
How would you purge? , Wouldnt purging bust the seal?
How about with ball joints or tie rod ends?
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Old 07-18-2012, 09:05 PM   #5
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I greased the U joints as per instructions. After that , the instructions said to grease the shaft. It said something like compress the shaft until fully compressed then pump grease in until you see grease come out of the vent hole on top. Once that is done cover the vent hole and continue to pump grease until you see grease start to come out of the seal on the shaft. Then you are done. Anyways I guess I did it right because that is what it said. I'm glad it is not diff oil.
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Old 07-18-2012, 09:19 PM   #6
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Every time I grease it flings everywhere. I don't use much in fact I use as little as possible. It still goes everywhere. No worries. Wipe it off. When it quits flinging its time to grease again.
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Old 07-18-2012, 09:30 PM   #7
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Think of it as free rust-proofing.
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Old 07-20-2012, 11:25 AM   #8
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Think of it as free rust-proofing.
Haha good one
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Old 07-20-2012, 11:34 AM   #9
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Originally Posted by catalinafairview View Post
I greased the U joints as per instructions. After that , the instructions said to grease the shaft. It said something like compress the shaft until fully compressed then pump grease in until you see grease come out of the vent hole on top. Once that is done cover the vent hole and continue to pump grease until you see grease start to come out of the seal on the shaft. Then you are done. Anyways I guess I did it right because that is what it said. I'm glad it is not diff oil.
By plugging the Vent Hole you force grease around the shaft...You did good.
If you compress the drive shaft like it tells you too, you do not fill that empty void full of grease....you are forcing the grease around the splines where it belongs... If you were to fill that void with grease, the first time you hit a HOLE the drive shaft would try to COMPRESS all that grease.....Then you'd REALLY have a mess....
You did good...."BH"
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Viet Nam Veteran 69-70, Troop "D" (AIR) 3/4 Cav. ,25th Inf. Div. CUCHI RVN. UH-1H Crew Chief of the "Pinball Wizard" 68-16224. Call Sign "CENTAUR".
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Old 07-20-2012, 11:51 AM   #10
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So once you see the seal start to expand you should stop correct?
How would you purge? , Wouldnt purging bust the seal?
How about with ball joints or tie rod ends?
Purge once a year ( this is NOT a JEEP Rule, use common sense ) unless you ford streams or do deep soupy mud....
Purging is nothing more than forcing out the old wear particles and any mud or water that may have collected inside the joints.
The rubber seals are only stuck on, they have a small lip that grips the joint, pump grease until it comes out clean around the seals.
Then wipe off the excess and push the seal back into place.... Sometimes seals can get old and hard, and they will crack or break apart....Replace the joint ,or if your like me, I save every damned part I take off unless it's destroyed completely, so I may have a "spare" seal...

Ball Joints are a little different, you can still Purge em just watch for the bleed hole, some have em, some don't, the ones that don't becarefull not to rupture the seal. Some the grease comes out around the stud, kind of a pain to clean em up.
These should also be greased with the weight OFF the joint...Jack it up and block the frame, let the susp. hang... Work SAFE !!

Tie Rod Ends ..Same way, the seal will lift and grease goes all over...

Off hand I do not know what JEEP specs for grease.... I like to use Heavy Duty Truck grease ( #2 ? ) But i don't ford streams and I don't mud hole... For those who do, I think I would load the grease gun with a good Boat Trailer Wheel Bearing Grease (green/blue ) That would give you a lot more protection from water wash out....Just my Opinion.
Have fun... "BH"

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Viet Nam Veteran 69-70, Troop "D" (AIR) 3/4 Cav. ,25th Inf. Div. CUCHI RVN. UH-1H Crew Chief of the "Pinball Wizard" 68-16224. Call Sign "CENTAUR".
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