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Thread: weird noise or vibration

  1. #31
    Join Date
    Dec 2006
    Location
    Mill Creek
    Posts
    1,224

    weird noise or vibration

    Bill that is an excellent question. The third member was made by Performance Products. I am assuming the lash is correct, but it may be an issue to look at after I get all these other questions answered.
    Now, as far as the drive shaft. I took it into Drivelines NW today where they made it. Here is the issue. When I put the 9" rear end in the car, my existing driveshaft was too long. So I took it to them for shortening. They showed me that my driveshaft was worn completely out. I agreed. They made a new one, 4" instead of 3 1/2 diameter and were supposed to make it 1 inch shorter. Instead, they made it one inch too long. Took it back and they agreed they screwed up. So, they said they shortened it one inch.
    Took it home and installed it. Now here is where the funny stuff begins. When I talked to them today, they thought, as you, that the yoke might not be going into the rear far enough, therefore creating a vibration.
    So, took the yoke home, measured the distance from the centerline of the yoke u-joint to pinion yoke c/l and called them with that dimension. They said my driveshaft was 1" too short and could be causing the problem. Now, did they cut off 2" the 2nd time? No way to know.
    Anyway, they are going to make a new one. I will let you know what happens and thanks a bunch for all the great input from you all. Together, we can conquer the world, by ourselves we just screw everything up. Maybe a little too philosophical on the conquer the world thing. Larry
    Larry Smith
    1964 Futura
    347 stroker



  2. #32
    Join Date
    Dec 2006
    Location
    Mill Creek
    Posts
    1,224

    weird noise or vibration

    This started out as a weird noise. But now, this is really getting weird. When I installed the 9" rear end, my driveshaft was too long. So, took it to drivelines NW to get it shortened. But, as I mentioned before they said it was worn out. So, bought a new one, 4" diameter instead of 3 1/2". They were supposed to make it 1" shorter, but made it 1" longer instead. Got it home, wouldn't fit, the found out they screwed up, and they said okay, they would shorten it. Well they did.
    I took it back to them yesterday to have them look at the balance and check out the u-joints. While there, I asked to check on the original paperwork to see the length because it was not inside the transmission far enough. The dimension they were supposed to make the driveshaft was 51 1/2. Guess what? It was 50 1/2. They admitted they cut off 3" making it 1" too short. They are making me another driveshaft today and will get it Monday. Sheesh, no wonder I am bald. Larry
    Larry Smith
    1964 Futura
    347 stroker



  3. #33
    Quote Originally Posted by BadBird View Post
    While there, I asked to check on the original paperwork to see the length because it was not inside the transmission far enough. The dimension they were supposed to make the driveshaft was 51 1/2. Guess what? It was 50 1/2. They admitted they cut off 3" making it 1" too short. They are making me another driveshaft today and will get it Monday. Sheesh, no wonder I am bald. Larry
    Thanks goodness you had the documentation/paperwork to back up your claim.

    Good luck and let's hope this exorcises the demons!

    Cheers,

    Ken in SSF CA

  4. #34
    Join Date
    Dec 2006
    Location
    Mill Creek
    Posts
    1,224

    weird noise or vibration

    I didn't mean it to sound like Drivelines NW has done anything purposely wrong. It was their paperwork. I knew they kept it on file because Alan at the desk showed it to me last time I was there. It had all the dimensions that were used. They have been very good and helpful, just made a couple of mistakes. Larry
    Larry Smith
    1964 Futura
    347 stroker



  5. #35
    Join Date
    Jun 2014
    Location
    Ellensburg
    Posts
    217
    Glad you have been able to sort it out - but, what a pain to get there.

    Fortunately, for me my vibration ended up being caused by the rear tire. New ones have fixed the problem.
    Scott Zimmerman


    '65 Falcon Futura 2 door hardtop, 289 V8

  6. #36
    Join Date
    Dec 2006
    Location
    Mill Creek
    Posts
    1,224

    weird noise or vibration

    Well, continuing on in this debacle. Got the driveshaft back. Installed. Took it for a test drive. It's not as bad as it was. IT IS WORSE. They tell me they did a spin balance and it was great.
    Vibration before would go away at about 60 if I let off the gas or gave it more gas. Now, all the time. Just more severe.

    I am not sure which way to go now. I don't like this, not one little bit, if it keeps up, I might say s*^$. How's that Dr. Seuss?
    Larry
    Larry Smith
    1964 Futura
    347 stroker



  7. #37
    Time to find another drive line shop

  8. #38
    Larry - that is odd it is now worse. Seems to me that the driveline must be a contributor if changes to it make it worse or better. You are certain now, with it installed, you only have about 1" of exposed yoke at the rear of the transgression?

    May seem a silly question, but when you got this transmission, did your motor need the 28 or 50 oz flywheel and harmonic balancer? If any of these are wrong for the setup of this hot motor you have, it would cause one heck of a issue. Ask me how I know...

    Again, the offer is still open to have me sit in the car and feel it for you as well. I can sit in the front and back and try to sense if the vibration is fore or aft - something that is hard to do when you are driving.
    Roger Moore

    63 "Flarechero"
    powered by: 347ci stroker | Tremec T5 | 8" 3:45 TracLoc rear



  9. #39
    Join Date
    Dec 2006
    Location
    Mill Creek
    Posts
    1,224

    weird noise or vibration

    I checked the dimension of the yoke into the transmission and it is 1" after bolted to rear end. So, that isn't a problem.
    As far as the 28 to 50 ounce balance, I never had problems with the 8" rear end and the tremec transmission, so not sure how that could be a problem now. Wouldn't that have shown up before? Especially since I had the car over 100mph then.
    I am going to put the car up on jack stands and run the car up to about 60-70 and see if there are any obvious issues.
    Then if I don't see something, Roger you are on for the ride.
    More to come, I am sure.
    Larry Smith
    1964 Futura
    347 stroker



  10. #40
    Major bummer Larry ! On the upside those leafs and Caltracs look killler . Did you have issues or a failure on your old 8" or did you just upgrade to the 9" for drag racing ? Did you buy a new 9" axel housing or have a used one narrowed ?

    1965 Hardtop, 289, Top loader, Torino power disk brakes, Tilt steering, 2 speed int wipers

    Mike Spears

  11. #41
    Mike has a good point there about the rear-end. You had no apparent issues with the 8" so, although there were a lot of fixes needed to make angles correct (needed no matter what), if the issue only really started post-9" install, then there must be something going on there. Only oddity is that changing driveline altered it.

    I am free this evening after work and for a bit on Friday morning after physical therapy (10am-ish). Willing, as usual, to come give it a look-see.
    Roger Moore

    63 "Flarechero"
    powered by: 347ci stroker | Tremec T5 | 8" 3:45 TracLoc rear



  12. #42
    Join Date
    Dec 2006
    Location
    Mill Creek
    Posts
    1,224
    Weird again. I put the car on jack stands. Ran the car up to 50-60 mph and the left rear tire looked out of round.
    Took it to Les Schwab and they did a spin test.
    They said it is definitely very out of round. Probably from molding process.
    The weird thing is, when we were in Reno last year going from Carson City to Reno, I had it over 100 mph with zero vibration. But, that was the last time I drove it over 45 till just the other day going to play golf.
    I am thinking it might have caused the tire to fail at the high speed? Doesn't matter I guess.
    The tires are BFG radial TA's. Since Michelin bought them out, they haven't been making that tire. They will I guess, but for now they found someone with one.
    I will let you know what happens after I get the new one. Larry
    Larry Smith
    1964 Futura
    347 stroker



  13. #43
    Fingers crossed.
    Roger Moore

    63 "Flarechero"
    powered by: 347ci stroker | Tremec T5 | 8" 3:45 TracLoc rear



  14. #44
    Hope that takes care of it !

    1965 Hardtop, 289, Top loader, Torino power disk brakes, Tilt steering, 2 speed int wipers

    Mike Spears

  15. #45
    Join Date
    Dec 2006
    Location
    Mill Creek
    Posts
    1,224

    weird noise or vibration

    Carol and I took the car out for a test run. No need to keep my fingers crossed any longer. This is definitely a problem in the rear end. We didn't even get to the freeway and the rear end started to howl.
    Bad news. Don't know why. Guess I start tearing it apart to look for gremlins. More to come. Larry
    Larry Smith
    1964 Futura
    347 stroker



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