Just a little reminder....

[wbt]

....not to trust ANYTHING posted by most everyone on this forum:

http://www.svtperformance.com/forum...-gt-auto-steeda-cai-tune-downshift-clunk.html

There are many comical errors in that thread but the one that takes the cake is post #8.

What you are hearing is most likely the output shaft splines of the Trans banging against the drive shaft slip yoke splines. The fix is to properly grease the slip yoke splines as described in multiple vehicle line TSB's.

The reason why this is more pronounced with a tune is likely due to a combination of faster than stock downshifts and downshifting to a locked converter. Both normal for a performance tune.

The reason why a driveshaft caused the issue is very few driveshafts come properly greased.

An easy test is to place the vehicle in reverse and back up, before coming to a complete stop place it in drive. Do this a few times and you should hear the same clunk.

I'll give you a hint....the OP's car has a stock driveline meaning no driveshaft change. The driveshaft bolts onto the trans and to the pinion flange. This guy supposedly does all the work on his own stuff and doesn't know this?

He is the "TiVCT master", make no mistake about it.

 

[mac10chap]

Perhaps he was saying that in response to what WHSTLR said...

I have the same exact issue however, mine came after a Aluminum Drive shaft isstall. Iasked in a thread if a tune was required and got blasted by members here that didn't take the time to think through what could cause it. Instead they posted stuff they thought was funny. Although it made me laugh it was not helpful at all and through trial and error I have been figuring this out on my own. I believe PLASMAN is correct about the shift pressure with the tune based on other tunes or the changing of certain parts that correlate with the drivetrain. i will find out soon as my car goes back to the tuner.

 

[Jambarino]

The roadkill section of that forum is always good for a chuckle.Stories of 5.0 and Mach 1 mustangs beating Z06's,Lambos,Ferrari's,5.0's beating built cobras left and right.Too many egos over there for me.But there are some bad rides on there.

 

[wbt]

Perhaps he was saying that in response to what WHSTLR said...

I have been running the same brand D/S that WHSTLR has for 2+ years and don't have that issue. Maybe he should contact Shaftmasters about his problem?

Either way, doesn't account for the OP's situation for which his "advice" does not apply to. I also don't think Shaftmasters is going to warranty a part the customer has been "advised" to take apart and grease by some 3rd party.

Kinda like being "advised" to run a full tank of gas at the race track.....

 

[CPRsm]

Perhaps he was saying that in response to what WHSTLR said...

Same thing I thought when I read his reply. Especially since the OP's problem already had a good possibility posted for him a few posts before that one. It's a valid fix. A lot of driveshafts have an external grease point for the splines for that reason.

 

[wbt]

Same thing I thought when I read his reply. Especially since the OP's problem already had a good possibility posted for him a few posts before that one. It's a valid fix. A lot of driveshafts have an external grease point for the splines for that reason.

He needs to discuss it with Shaftmasters. His D/S being new, I highly doubt it wasn't properly greased before it was shipped. Tearing it apart to do what was suggested isn't sound.

Slip yoke D/S's are going to be a little nosier than a C/V setup due to extra lash. I see no mention of that in either of the threads.

If WHSTLR thinks his car is noisy, he should ride in a car with a locker diff. His other option is to put the stock D/S back in or use a C/V joint, aftermarket piece like DSS offers.

 

[CPRsm]

Maybe he needs to discuss that with them. Add it to the thread. Either way it was valid possibility. New doesn't mean perfect.

 

[kdanner]

Doesn't matter what driveshaft he has, there is no slip yoke in that trans. AED = FAIL, AGAIN!

 

[CPRsm]

Doesn't matter what driveshaft he has, there is no slip yoke in that trans. AED = FAIL, AGAIN!

What you are hearing is most likely the output shaft splinesof the Trans banging against the drive shaft slip yoke splines.

Only fail I see is reading comprehension.

 

[kdanner]

Hello?

"output splines of the trans"

The 6R80 has a bolted on flange, it does not have a slip yoke, so a yoke can't possibly bang against the output shaft splines. AED = FAIL

 

[CPRsm]

I know it bolts on, I've personally torn them down, and have a MT82 torn apart here right now, too. The output most certainly has splines on both trannies, with a pressfit before bolt goes in.
Hello what? First you said the trans didn't have a slip yoke and I point out he didn't say that. Now we're on the same page there. When a slip yoke chatters the vibrations travel up the shaft, to the companion flange, then what???? Yup, the output shaft splines.
But FAIL though. Ford has all those TSB's out there for extra credit.

 

[DWalker]

 

[BMR Tech]

lol....................

 

[wbt]

I know it bolts on, I've personally torn them down, and have a MT82 torn apart here right now, too. The output most certainly has splines on both trannies, with a pressfit before bolt goes in.
Hello what? First you said the trans didn't have a slip yoke and I point out he didn't say that. Now we're on the same page there. When a slip yoke chatters the vibrations travel up the shaft, to the companion flange, then what???? Yup, the output shaft splines.
But FAIL though. Ford has all those TSB's out there for extra credit.

Can you link those TSB's about the output shaft/flange issues on the 6R80?

...this certainly doesn't apply does it?
http://www.ford-trucks.com/forums/1140630-slip-yoke-bump-is-back-after-tsb-repair-what-next-2.html

 

[CPRsm]

Sorry was there anywhere that was said the 6R80 had a TSB?

The fix is to properly grease the slip yoke splines as described in multiplevehicle line TSB's.

If multiple vehicles have a TSB, it may be who of you not to look past it as a possibilty. My example wasn't even from Ford, it was Peterbuilt semi's. So it's not isolated to one company or tranny. Does your link apply to the 6R80? Nope. Is it a tell tale sign? Juuuuust maybe. Point was it was a possibility. And it is entirely possible.
But you missed who he was actually talking to and started a thread. Then it didn't matter because the tranny doesn't have a slip yoke?

 

[wbt]

Sorry was there anywhere that was said the 6R80 had a TSB?

If multiple vehicles have a TSB, it may be who of you not to look past it as a possibilty. My example wasn't even from Ford, it was Peterbuilt semi's. So it's not isolated to one company or tranny. Does your link apply to the 6R80? Nope. Is it a tell tale sign? Juuuuust maybe. Point was it was a possibility. And it is entirely possible.
But you missed who he was actually talking to and started a thread. Then it didn't matter because the tranny doesn't have a slip yoke?

Re-read what you posted.

When a slip yoke chatters the vibrations travel up the shaft, to the companion flange, then what???? Yup, the output shaft splines.

Ford has all those TSB's out there for extra credit.

It is a bit difficult to interpret what you are saying but it appears you are implying that the bolt on flange for the output shaft is the cause of the issue and Ford has released many TSBs about it. The link I posted was an attempt to locate a TSB for the issue you were implying existed. It contained some possible real fixes which include replacing the D/S and updating the tune. Several have had their shafts re-greased, which resulted in no fix.

Now lets get back to my original point....his advice doesn't apply to the OP's situation. In fact, it wouldn't solve the issue for WHSTLR.

It's just a continual history and pattern of bad advice. You can spin it whatever way you want.

 

[CPRsm]

It is a bit difficult to interpret what you are saying but it appears you are implying that the bolt on flange for the output shaft is the cause of the issue and Ford has released many TSBs about it. The link I posted was an attempt to locate a TSB for the issue you were implying existed. It contained some possible real fixes which include replacing the D/S and updating the tune. Several have had their shafts re-greased, which resulted in no fix.

I was using a TSB to show the possibility of the problem existing. Hell I've even greased u-joints and solved vibrating driveshafts. Don't go start a new thread though.
It's really not hard to interpret. The plunging slip yoke chatters from a lack of lube. That chattering travels up the driveshaft thru the companion to the teeth/mainshaft/output shaft. There is nothing wrong with any of those last four components. They are just transmitting the noise. He could have listed any number of parts the chattering travels thru and he'd have been right. He could said it went thru the ring and pinion and suspenion. It doesn't need to slam the lash close on an outputshaft like kdanner's thinking. It has to "bang" something to transmit the noise or they wouldn't feel the clunk. After the chatter of the toke there doesn't need to be anymore parts colliding to make noise.

Now lets get back to my original point....his advice doesn't apply to the OP's situation.

Here we are again. Your original point was completely moot. His advice wasn't for the OP. The first poster after you saw that as well.

In fact, it wouldn't solve the issue for WHSTLR.
It's just a continual history and pattern of bad advice. You can spin it whatever way you want.

Whether it would have solved it for him or not wasn't the point. You thought his answer was impossible. My point was it's a valid fix for other vehicles, and it could be for that one as well. Even if a tune fixes WHSTLRs problem, his advice was solid. It applies to all aftermarket driveshafts. CV or slip yoke. Any plunging device lacking lube can chatter. Even if it's from the same company you've used for 2 years without problems and his is new. Shit happens. Any imperfection in the rollers of the CV or tracks, and output shaft machines .020 too large in the tailshaft housing on a T56 and you can't see it. You can feel it when you hit a bump. Have fun finding that one. Always consider all possibilites because they will bite you in your ass for days because you thought you were smarter than the problem. Been there, wasted those DAYS looking.

There's no spinning anything anywhere, it's pretty straight forward. You started a thread grabbing at straws trying to bad mouth someone you don't like, when you tried to apply the wrong advice to the wrong person and you felt everyone needed to know. Sound about right ?

 

[wbt]

I was using a TSB to show the possibility of the problem existing. Hell I've even greased u-joints and solved vibrating driveshafts. Don't go start a new thread though.
It's really not hard to interpret. The plunging slip yoke chatters from a lack of lube. That chattering travels up the driveshaft thru the companion to the teeth/mainshaft/output shaft. There is nothing wrong with any of those last four components. They are just transmitting the noise. He could have listed any number of parts the chattering travels thru and he'd have been right. He could said it went thru the ring and pinion and suspenion. It doesn't need to slam the lash close on an outputshaft like kdanner's thinking. It has to "bang" something to transmit the noise or they wouldn't feel the clunk. After the chatter of the toke there doesn't need to be anymore parts colliding to make noise.



Here we are again. Your original point was completely moot. His advice wasn't for the OP. The first poster after you saw that as well.


Whether it would have solved it for him or not wasn't the point. You thought his answer was impossible. My point was it's a valid fix for other vehicles, and it could be for that one as well. Even if a tune fixes WHSTLRs problem, his advice was solid. It applies to all aftermarket driveshafts. CV or slip yoke. Any plunging device lacking lube can chatter. Even if it's from the same company you've used for 2 years without problems and his is new. Shit happens. Any imperfection in the rollers of the CV or tracks, and output shaft machines .020 too large in the tailshaft housing on a T56 and you can't see it. You can feel it when you hit a bump. Have fun finding that one. Always consider all possibilites because they will bite you in your ass for days because you thought you were smarter than the problem. Been there, wasted those DAYS looking.

There's no spinning anything anywhere, it's pretty straight forward. You started a thread grabbing at straws trying to bad mouth someone you don't like, when you tried to apply the wrong advice to the wrong person and you felt everyone needed to know. Sound about right ?

Wrong.

Apparently I interpreted him correctly.....

http://www.svtperformance.com/forum...da-cai-tune-downshift-clunk.html#post13104781

Found the F150 TSB, only applies to 2-piece drive shafts as that is where the slip-yoke is located. Mustang 2-piece should be the same.

http://www.fordservicecontent.com/pu...sb12-07-13.pdf

If you would spend less time on his sack you may see things differently.

 

[CPRsm]

You're following a guy around on a website you're banned from, and I'm the nutswinger? LOL I'm not the one with the cheese taste in their mouth. Damn it's summertime too, mist be like peanutbutter LOL. Broken record with an agenda. Like little Lisa Simpson. All the answers to questions nobody asked.

Hey, I'm defending another company on SVT where the customer wants money back for his mistake. Must be nutswinging over there, too. Hell I've even defended ON3. Calls it like I sees it. Pretty straight forward. Got anything other than your usual hum drum attempt an insult?

Oh god he was wrong didn't know what kind of plunging device it had!! Let's go burn that place to the ground and crucify him!!! There's no possible way a CV joint could have had the same symptoms,... oh wait.

Your time might be better spent being contructive instead of trying to prove how super smart you are just waiting for others to slip up. No one cares, really. Look at the size of the crowd rallying behind you. We get it. You don't like him or JLT, they're idiots blah blah blah. Move the fuck on already.

 

[LAStang1234]

Ughhhhh!!!! (DMX voice)


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