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7 Series - E38 (1995 - 2001)

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  #1  
Old 08-30-2015, 05:20 AM
MR.WH1TE MR.WH1TE is offline
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Phantom vibration

Ok gentleman ...

For several years I've been replacing every possible culprit to get rid of a surging vibration between 2200 and 3000 rpm with no avail. Everything in the suspension has been replaced, driveline guibo and center bearing, wheels/tires, engine and transmission mounts, I'm running out of ideas. I'm down to harmonic balancer. Does anyone have any experience with this diagnosis?
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  #2  
Old 08-30-2015, 05:22 PM
MR.WH1TE MR.WH1TE is offline
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And........crickets
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  #3  
Old 08-30-2015, 07:21 PM
u.nanimous u.nanimous is offline
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Sorry, no experience. A unique issue, probably why the crickets. Have you also asked on BF?

So you mention the RPM range and a bunch of parts that are not on the engine. Does it happen in that RPM range in every gear? In that case I would go with the harmonic balancer. If it is actually speed related than the engine is the last place I would replace parts.
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Last edited by u.nanimous; 08-30-2015 at 07:25 PM.
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  #4  
Old 08-31-2015, 12:36 AM
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FABOCH FABOCH is offline
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Quote:
Originally Posted by MR.WH1TE View Post
Ok gentleman ...

For several years I've been replacing every possible culprit to get rid of a surging vibration between 2200 and 3000 rpm with no avail. Everything in the suspension has been replaced, driveline guibo and center bearing, wheels/tires, engine and transmission mounts, I'm running out of ideas. I'm down to harmonic balancer. Does anyone have any experience with this diagnosis?
Torque Converter
you need a Trans fluid(OEM Liquid Gold)and OEm Filter R&R my friend or simply add this
DR TRANNY to ur transmission oil


Im in the same boat
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2000 740i Sport , Alpina 21`, Alpina Lip, Alpina Deco kit,Dinan 7,Dinan TB, DINAN CAI, DINAN Exhaust, Dinan Stage 5, Dinan 4/5 transmission, Dinan manifold, Highline individual interior,Eibach/Bilstein,Zimmerman Timing guides 08/13
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  #5  
Old 08-31-2015, 03:01 AM
MR.WH1TE MR.WH1TE is offline
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Ty had the fluid and filter done 3 months ago with the replacement transmission. The Dr. Tranny option looks interesting.
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  #6  
Old 08-31-2015, 06:12 AM
MR.WH1TE MR.WH1TE is offline
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Have you tried this product yet?
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  #7  
Old 08-31-2015, 08:54 AM
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FABOCH FABOCH is offline
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I bought it and sitting in my garage. I just got to figure out how to insert the tube. Lol
Or simply flush out oil and pour new Oem liquid gold
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  #8  
Old 08-31-2015, 11:44 AM
MR.WH1TE MR.WH1TE is offline
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Are you referring to the dipstick retrofit
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  #9  
Old 08-31-2015, 04:34 PM
u.nanimous u.nanimous is offline
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Quote:
Originally Posted by MR.WH1TE View Post
Are you referring to the dipstick retrofit
Do you have one of those? I've seen the ad but haven't heard from anyone that has one on an E38.


and...

+1 FABOCH

I didn't put together "surging vibration" with "TC shudder"...I haven't had that yet but I've read about it. I know others have used Dr Tranny with good success.
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  #10  
Old 08-31-2015, 05:35 PM
MR.WH1TE MR.WH1TE is offline
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I'm glad to hear positive feedback on Dr Tranny. I haven't Pursued the filler upgrade yet . My previous transmission had the same shudder that's why I thought harmonic balancer. All but 3 of the bolts had backed themselves out a few years ago and that's when I started noticing a vibration . Any thoughts?
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  #11  
Old 08-31-2015, 06:55 PM
u.nanimous u.nanimous is offline
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I believe there are a couple positive comments about Dr Tranny in the "What did you do..." thread (?Swank350 & MayorChuck?), as well I'm sure in a few strictly tranny threads.

If you search the E39 forum I'm sure you will get a lot more results regarding the harmonic balancer than in here. Is it an easy check for loose bolts from under the car? Have you taken off your belts and checked them and the pulleys (especially the main drive on the crank)?

Last edited by u.nanimous; 08-31-2015 at 06:56 PM. Reason: Learn to SPELL danmit!
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  #12  
Old 08-31-2015, 08:28 PM
MR.WH1TE MR.WH1TE is offline
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Belts were replaced . The balancer had all but fallen off when I realized the issue. I will replace it regardless. I just want the car that I know is in here
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