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86 300E - driveshaft rebuild questions
Back again with more questions -
I pulled the driveshaft last weekend and looking at the u-joint today I find that it seems to have a "detent" in the central position, i.e. it takes additional effort to deflect it away form center in all four directions. There doesn't appear to be any looseness or roughness, however, throughout the limits of travel. I have noticed a mild low frequency resonant drone at freeway speeds. Could this be due to the u-joint? Though it's not normally a serviceable part I understand that some driveshaft shops can install a new u-joint in these and rebalance them. Can anyone recommend a place in the L.A area of So. Calif.? Otherwise, are there any recommendations for online suppliers? I've found a couple so far; Driveline Service or Portland rebuilds them with a greasable, replaceable u-joint, and I'm waiting to get a quote from them, as well as some information on lubing requirements and whether the new joint is staked or if they cut a circlip groove or something. They warranty for 5 yrs. or 50K mi. The other one is Driveshaft Specialist, Inc. and they replace it using a sealed u-joint. They claim that the greasable ones require lubing every 5k mi. to get any useful life out of them which would be impractical on the MB. They have a good comparison of greased vs. sealed u-joints on this page. They warranty theirs for one year, but with unlimited mileage, and state that thier joints typically last upwards of 125k mi. Their price is US $329 - $374, incl. a new center bearing and carrier, UPS ground shipping and the $60 refundable core charge. Does anyone have any direct experience with either of these firms, or opinions about greaseable vs. sealed u-joints? Thanks Gary |
#2
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Before you go to all that trouble and expense, you can probably get the vibration out of it, by simply putting a washer between the carrier bearing bracket and the body on both bolts. This moves the position of the u-joint just enough to get it away from the worn spot and will usually do away with the vibration.
Good luck, |
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you didn't say what kind of shape the rubber flex joints were in, I have torn them apart before, my 83 300d I did and used parts from performance probably 10 years ago, a pain but not impossible, my 86 I did the flex joints only at 125000 so far so good now 139000
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#4
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He didn't talk about the flex disks because he has found the "notch" in the u-joint. That is clearly the cause of the problem.
Have a great day, |
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__________________
1989 250TD Wagon 5-speed, 160,000mi ::: Dark gray metallic / black cloth 1984 190D-2.2 5-speed, 287,000mi ::: Silver-blue metallic / black MB-tex ::: SOLD |
#6
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I'd still like to hear about anyone's experiences with rebuilt driveshafts or these two specific companies (or any others you might know about) and opinions about sealed vs. greasable u-joints. Gary |
#7
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Gary |
#8
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I have used driveline service in las vegas for my truck and had good luck, but I don't know if they are related
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#9
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I would not recommend just any old driveshaft shop for this particular shaft. It needs to be someone who has done them before.
I used a driveshaft shop in Arizona. I think the name was Bejer. They only do work for commercial shops, so if you don't have a shingle hanging outside the door you will need to find a shop to get it done for you. Their work is first rate. Most shops that do the joint on these shaft use an American car u-joint from an early sixties Ford Falcon. Bejer uses a much stronger joint. Good luck, |
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I can help...
With the finger recalibration - 5 on the left, 5 on the right (LOL) - sorry, had to do it.
This is way over my head, but I'm going to follow it - I learn a lot from you guys - my Indy actually appreciates my having a half-assed understanding of what he goes through to fix a problem I might have. He appreciates that I can understand what he goes through to get there. Sorry for the hi-jack. Kevin
__________________
"Dangerous with a wrench...and not smart enough to know it" Stable (in order of acqusition): '84 500SL, 280SEL (Euros) '77 280SE. '90 560SEL '79 450SEL 6.9, '95 C280 (totalled by daughter 8/07) '81 280SL (rescued) '88 300CE '86 560SEC '95 C36 '01 CL55 DD's: '04 S500 4Matic (SWMBO) '04 F150 Crew |
#11
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Gary,
I don't believe your drone is caused by the driveshaft. I'd look elsewhere. If you are experiencing a slight lock in the center position, it is normal. It means that your driveshaft is on its way out, but still serviceable. A u joint unlike a CV or Rezeppa joint increases and decreases speed as it rotates. This constant speed change dependant on angle hammers on the needle bearings on the sides of the joint and doesn't affect the top and bottom bearings. When you rotate the joint, it is very free from side to side, because the bearings are worn. The bearings on dead center appear stiff, because they are not worn. If you feel a catch anywhere off center you have problem, and the joint needs to be replaced. If you insist on having the joints replaced, PM me and I will supply several #s of top quality driveshaft rebuilders. If you want cheap, I can't help you, because I don't go that way. I also would not fall for the crap about greaseable fittings. Think about it. The first set did about 200k without grease. Peter
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Auto Zentral Ltd. |
#12
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As an addition to my previous post, you need to feel the detents with the front piece removed. If you look carefully, you will see alignment marks which if IRRC are in the shape of triangles so you can reassemble in proper order.
peter
__________________
Auto Zentral Ltd. |
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#14
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I realise from your description that there is wear in the driveshaft universal joint. I also know from his previous threads that Larry has had considerable experience with driveshaft issues. If however despite this it is not the driveshaft, you may like to consider a situation I had some years ago. Admittedly this was a problem with my 107 not my 124, but I also had a drone or a hum that was obvious only at highway speeds. Everyone suggested a driveshaft problem but I was not convinced. The drone or hum apart from being slightly audible, could be felt slightly through the steering wheel. It certainly was nothing like shimmy due to a wheel balance problem. The problem turned out to be worn front wheel bearing. No wear was apparent with the front of the car raised and rotating the wheel and nor was any vibration noticeable at low speeds. Only when travelling at around 110km/h (70mph) did it become noticeable. New front wheel bearings fixed the problem. This may be worth exploring before diving into the effort and expense of a driveshaft repair.
__________________
107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership). 107.026: 500SLC, 4-speed auto, thistle green, green velour. 124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex. 201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather. 201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex. 201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather. |
#15
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Gary |
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