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post #1 of 33 (permalink) Old 01-11-2009, 11:55 AM Thread Starter
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Popping / tack, tack,tack @ Take off

Hey there'
I just re-did my rear end and still have this noise coming from my Rear-end. I don't know what else to look for. May it be the Gear's ?
Replaced:
Toe Compensator Link; Wheel Bearings; Knuckle with Bushings; Axle's(Mark8, used from a very trustful source here).
Everything else is looking good. The Rear diff. was done like 2 Years ago with Poly Bushings. So i need to get the car Aligned and i am totally clueless about what else!
The Noise only appears at take off(like a, when you late for work take off) and there is no popping in Reverse.
Any Ideas??? Thanks.

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post #2 of 33 (permalink) Old 01-11-2009, 02:37 PM
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U joints can squeak when they go bad. Put the car in neutral with the parking brake on, wheels blocked, whatever and check them!

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post #3 of 33 (permalink) Old 01-18-2009, 09:11 PM Thread Starter
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knocking / Rattling

may it be more an knocking / Rattling !
Changed now the IRS Bushings and and went back to Factory SwayBar Mounts.
What else to look for? The noise appears only @ take off or hart acceleration while driving @ City speeds.
It seems to get worse more i test. It's coming from the rear and does not change @ left/right/straight take off.

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post #4 of 33 (permalink) Old 01-18-2009, 09:12 PM Thread Starter
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Quote:
Originally Posted by Rob View Post
U joints can squeak when they go bad. Put the car in neutral with the parking brake on, wheels blocked, whatever and check them!
Thanks Rob, but its not an Squeak.

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post #5 of 33 (permalink) Old 01-18-2009, 09:28 PM Thread Starter
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Quote:
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U joints can squeak when they go bad. Put the car in neutral with the parking brake on, wheels blocked, whatever and check them!
What for exactly?

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post #6 of 33 (permalink) Old 01-20-2009, 03:49 PM
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He means to check them for excessive play and/or noise while rotating.

I sincerely doubt it has anything to do with the extension housing on the transmission. When those have an issue you KNOW it. Leaks around the rear seal and severe vibration on the road make themselves known in a big way.

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post #7 of 33 (permalink) Old 01-20-2009, 04:27 PM Thread Starter
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Quote:
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He means to check them for excessive play and/or noise while rotating.

I sincerely doubt it has anything to do with the extension housing on the transmission. When those have an issue you KNOW it. Leaks around the rear seal and severe vibration on the road make themselves known in a big way.

Darrin
No Noise or play from the U-joints.
The rear seal from the housing is leaking and there is a clunking sound when i turn the MMX left/right. May it be the output Shaft bushing and transferring the rattling/popping/groining noise to the back?
It's freaking me out just after all the ReDo !

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post #8 of 33 (permalink) Old 01-20-2009, 07:54 PM
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You likely will hear things when you turn the driveshaft left to right.

If the seal is leaking you likely have a problem that is causing it. Usually driveline vibration beats the heck out of the bushing and the leaking starts.

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post #9 of 33 (permalink) Old 01-20-2009, 09:29 PM Thread Starter
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Quote:
Originally Posted by Darrin View Post
You likely will hear things when you turn the driveshaft left to right.

If the seal is leaking you likely have a problem that is causing it. Usually driveline vibration beats the heck out of the bushing and the leaking starts.

Darrin
Nope, the Car is running smooth. Just when i take off with mid gas i have this rattling. After some search here i hope the T-Housing is may loose.

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post #10 of 33 (permalink) Old 01-21-2009, 06:40 AM
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Are you talking about the tailshaft housing?

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post #11 of 33 (permalink) Old 01-21-2009, 06:51 AM Thread Starter
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Quote:
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Are you talking about the tailshaft housing?

Darrin
Yes

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post #12 of 33 (permalink) Old 01-21-2009, 06:57 AM
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after my little ordeal with tracking down my rattle all i can offer up is a whole hearted good luck.
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post #13 of 33 (permalink) Old 01-21-2009, 07:43 AM Thread Starter
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after my little ordeal with tracking down my rattle all i can offer up is a whole hearted good luck.
Thank You. I was following your Thread. I wish it was only some Brake pad Rattle

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post #14 of 33 (permalink) Old 01-21-2009, 10:35 AM
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If the tailshaft housing itself is loose enough to cause noise I think you would have one heck of a big leak coming from the gasket between it and the transmission and not from the rear seal.

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post #15 of 33 (permalink) Old 01-21-2009, 12:33 PM Thread Starter
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Quote:
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If the tailshaft housing itself is loose enough to cause noise I think you would have one heck of a big leak coming from the gasket between it and the transmission and not from the rear seal.

Darrin
Makes sense. The Tailshaft Housing looks good and feels tight. I am on the Video Clips now and hope to have them up later. Thanks for staying curious. lol

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post #16 of 33 (permalink) Old 01-21-2009, 01:32 PM Thread Starter
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Video

Here is a clip from the Tailshaft Housing / Output Shaft.



Here is a clip from the inside, sorry the Exhaust is a lil Loud.




And here from the Back. No rattling.



And this clip closer to the Tailshaft Housing it self. I cant hear nothing but is laoud on the inside of the Car.



Enjoy. lol

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post #17 of 33 (permalink) Old 01-23-2009, 04:55 PM Thread Starter
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No suggestions anyone ? Darrin !

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post #18 of 33 (permalink) Old 01-23-2009, 06:21 PM
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Sounds like wheel hop and your rear differential mount is beginning to fail. You know anyone that wants wiper arms?

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post #19 of 33 (permalink) Old 01-23-2009, 08:28 PM Thread Starter
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Sounds like wheel hop and your rear differential mount is beginning to fail. You know anyone that wants wiper arms?
Do the come Brain-coated? No Pres', no wheel hop.The mount is a easy fix' seen it too. Thanks. Last thing it did was that i loosened the Differential Housing and try'ed to center it some. What didn't help. lol
Guess i have to pull the Shaft to have a better look at all. Just not right now no more. Comp. Links, UCA, Power Brake Booster and Master Cylinder came in may way. Two Alignments,etcetera, etcetera. It just never end's.
Anyway, is loud on the inside of the Car and i think the DS is hitting in the Tunnel above the Tank. Soon or later i get it like the rest so far.

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post #20 of 33 (permalink) Old 01-23-2009, 08:49 PM Thread Starter
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Those from behind the center Console. Just Amplify it and get an idea.lol




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post #21 of 33 (permalink) Old 01-23-2009, 09:00 PM
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With the deflection of the differential that you can see in the video, it is certainly possible that the driveshaft is hitting back there.

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post #22 of 33 (permalink) Old 01-23-2009, 09:21 PM Thread Starter
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With the deflection of the differential that you can see in the video, it is certainly possible that the driveshaft is hitting back there.
I will give it a shot tomorrow. If I but something like a chisel in the Differential rear mount to prevent it from compressing that much it should at least change the noise somehow.

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post #23 of 33 (permalink) Old 01-24-2009, 08:51 AM Thread Starter
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With the deflection of the differential that you can see in the video, it is certainly possible that the driveshaft is hitting back there.

Just did a test drive. The Rattle is almost gone.
Question now is to but a Bolt in the new used one or weld the Mount like MN12Perf. !

Thanks again Preston

( for test only )

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post #24 of 33 (permalink) Old 01-27-2009, 09:22 AM Thread Starter
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going crazy

'pulled a new Diff Mount yesterday and installed it. I still had a light rattling after a short test drive. Dropped my son off at Day Care just now and drove a few more times around the block and the rattling is BACK.
Any more suggestions here ?
This the actuall Diff. Mount.

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post #25 of 33 (permalink) Old 03-11-2009, 10:46 AM Thread Starter
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Update

I pulled the Drive-Shaft today and found where it's hitting.


Here comes my question, can i cut some of this area or is it better to leaf it as is because of chassis stability?
With the Drive-Shaft installed there is only approx. a 1/4" space between DS and Chassis!




Thanks for any Input !

-Maic

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post #26 of 33 (permalink) Old 03-11-2009, 12:26 PM
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Look for my thread I had the same issue , I took a hammer where it was rubbing .

http://forums.tccoa.com/showthread.php?t=102803 here it is , One of my issues was the transmission shift pressure was way to high on my xcal tune .
I lowered the pressure and I have been driving like this for at least a year .

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post #27 of 33 (permalink) Old 03-11-2009, 01:05 PM Thread Starter
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Look for my thread I had the same issue , I took a hammer where it was rubbing .

http://forums.tccoa.com/showthread.php?t=102803 here it is , One of my issues was the transmission shift pressure was way to high on my xcal tune .
I lowered the pressure and I have been driving like this for at least a year .
Just found the Thread and was about to post the Link. Thank you anyway.
Hitting this area with a Hammer is one way, i was thinking of cutting some of this section for max. Clearance!
Will see who else got some input. For now i have to deal with the U-Joints. They still look good but i have them here for just in case. lol
-Maic

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post #28 of 33 (permalink) Old 03-11-2009, 01:20 PM
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why all of a sudden are we having clearance issues with drive shafts? did something change with them?

other than swapping in a new shaft i would say beating the hell out of it with a bfh is going to be your only solution.

hope it didn't ruin your drive shaft.
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post #29 of 33 (permalink) Old 03-11-2009, 01:35 PM
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Just found the Thread and was about to post the Link. Thank you anyway.
Hitting this area with a Hammer is one way, i was thinking of cutting some of this section for max. Clearance!
Will see who else got some input. For now i have to deal with the U-Joints. They still look good but i have them here for just in case. lol
-Maic
I did do some cutting with the hammering , like I said I had no issues since .
Do you have a tune where you can adjust the shift pressure on the tranny ?
I lowered the pressure for the 1-2 shift with the xcal . I think it was too
aggressive but there was definitely clearance issue with mine.

Ohh I dropped the gas tank too , it sucks not having a lift

good luck !

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60'...... 2.06
1/8th .. 9.194
mph .... 77.13

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post #30 of 33 (permalink) Old 03-11-2009, 03:29 PM Thread Starter
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Don't know where the issues come from. I just recently did the Rear end with new UCA, Spring Insulators, Compensator Link, new Knuckles, Air Bags and Diff. Bushings. Never noticed that before, the DS is in since approx. 4 years now.
So lets cut and Hammer, throw a Pinion brace in and hope for the best.

"cjchevez" no xcal here. SCT Chip and i don't think there is any aggressive about it.
Other than in your case, my noise only appears at mid. range takeoff and not at all in reverse.

-Maic

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