slip/clunk update on acceleration
Freshman User
Joined: Mar 2004
Posts: 40
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From: Montreal, QC
I brought in my truck for it's 10000 kms inspection and mentionned it to them.. Went for a test drive with the mechanic, and he noticed he too. Got it back, and it is working great now. For how long, we'll see. They put some kind of Teflon Grease inside the drive shaft in the rear of the truck. Solved my problem.
They haven't fixed my other problem since I had the truck. In the steering column I have some kind of ticking sound, and it is really annoying, I've driven other F150 2004's and they didn't have it. I test drove with the mechanic, he noticed it, left the truck their all day, he couldn't reproduce the tick, go figure, it always happens to me, rain or shine.
They haven't fixed my other problem since I had the truck. In the steering column I have some kind of ticking sound, and it is really annoying, I've driven other F150 2004's and they didn't have it. I test drove with the mechanic, he noticed it, left the truck their all day, he couldn't reproduce the tick, go figure, it always happens to me, rain or shine.
Elder User
Joined: Jul 2004
Posts: 511
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From: South Jersey
The only thing they can grease on the driveshaft are the splines on the tail piece that slides into the tranmission. If grease cured the problem I wouldn't hold my breath on it being permanent..
Senior User
Joined: Jul 2004
Posts: 251
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From: S.I., N.Y.
Unbelievable!
went to Island Ford this morning expecting to have to convince the mech that there was a problem with my truck. first words out of the service mgr's mouth were "Let me see if there are any TSB's for that problem" He found both of them for geasing the slip yoke and replacing the clutch pack. Mech road tested it an confirmed the problem. They ordered the parts today and it should be fixed by next week.
Somebody PINCH me ! This had to have been a dream.
Somebody PINCH me ! This had to have been a dream.
Senior User
Joined: Jul 2004
Posts: 251
Likes: 0
From: S.I., N.Y.
Hey Dunk! Maybe they figure that by the time the grease wears out, the parts will have mated better. If not, I'll be going back until it's done right.
I was smart this time, I bought from a local dealer. he's only 3 miles away.
I was smart this time, I bought from a local dealer. he's only 3 miles away.
Junior User
Joined: Jan 2002
Posts: 77
Likes: 0
From: North of Detroit, USA
Sproing & Clunk
I had gotten used to the clunk shifting from 1st to 2nd... and the "sproing" noise about 1/2 second after taking my foot of the accelerator was making me think my hearing was out of whack. Sounds like a spring releasing and catching on something under the hood, back by the firewall.
at 16500+ miles, on a NC-built, build date in mid Dec 2003, 2004 F150 4x4, extended cab XLT - shift on the column with center console, with 3.73 rear & limited slip, I'm ready to take it in for service work. Thanks everyone for troubleshooting the problem. Another ugly way to discover it is to be stopped on a slight uphill grade, put trans in Reverse, foot on brake. Ease off the brake and listen to the groan. BLECH.
I gotta tell you though - that clunk is SUPER noticeable when towing a big load!! (5200 pound gooseneck with about 2800 pounds of horse & camp equip). Right at my max GVWR & payload, but under GCWR & max tow.
at 16500+ miles, on a NC-built, build date in mid Dec 2003, 2004 F150 4x4, extended cab XLT - shift on the column with center console, with 3.73 rear & limited slip, I'm ready to take it in for service work. Thanks everyone for troubleshooting the problem. Another ugly way to discover it is to be stopped on a slight uphill grade, put trans in Reverse, foot on brake. Ease off the brake and listen to the groan. BLECH.
I gotta tell you though - that clunk is SUPER noticeable when towing a big load!! (5200 pound gooseneck with about 2800 pounds of horse & camp equip). Right at my max GVWR & payload, but under GCWR & max tow.
New User
Joined: May 2004
Posts: 12
Likes: 0
I have the same sound/feeling with my truck. Not a big deal, but considered having the clutch pack swap done. However I talked to a mechanic I trust and he told me first, it is not uncommon for limited slip diffs to do what we are describing, (he has a '99 Z28 that does the same thing), and second that the clutch pack that Ford is using to replace the one in the trucks now has about half the clutch surface, thus the limited slip function is not going to be as strong. I now have taking more time to think about doing the swap.
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Senior User
Joined: Jul 2004
Posts: 251
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From: S.I., N.Y.
all of the 4X4's I've owned had LS rears and this is the 1st one that has ever done this. I guess I had uncommon trucks. How well do you really know this mech? As far as half the clutch surface. Don't you think that they would just be setting themselves up for future problems. I'm getting the fix done next week.
Also think about this. You're getting the shudder because the clutch is slipping. If the slip goes away, doesn't it make sense that the new clutch is stronger than the previous one.
Also think about this. You're getting the shudder because the clutch is slipping. If the slip goes away, doesn't it make sense that the new clutch is stronger than the previous one.
Last edited by Fcal; Aug 18, 2004 at 10:25 PM.
Elder User
Joined: Jul 2004
Posts: 511
Likes: 0
From: South Jersey
I too would like to know how you know this. It doesn't make sense unless they added more clutch pac surface and found it doesn't work. Ford's been building limited slip, traction-Loc and detroit lockers since the 60's..
I had a 69' Mach I with a 4.30 Traction Loc axle that would scream if one tire was on ice and you stepped on it. Ford said it was a quirk they had with that rear, but you could dump the clutch at 3500rpms break both tires loose on dry pavement then stand on the pedal and melt those polyglass tires Mach I's came with..turn the car sideways going into 2nd gear...because the clutches in the rear would let up during the shift then grab and straighten the car out. The shift from 2nd to 3rd was nearly as violent, but that 428 Cobra Jet engine would put down 8-10 ft of rubber at 75-80mph if you weren't careful with the clutch.
I had a 69' Mach I with a 4.30 Traction Loc axle that would scream if one tire was on ice and you stepped on it. Ford said it was a quirk they had with that rear, but you could dump the clutch at 3500rpms break both tires loose on dry pavement then stand on the pedal and melt those polyglass tires Mach I's came with..turn the car sideways going into 2nd gear...because the clutches in the rear would let up during the shift then grab and straighten the car out. The shift from 2nd to 3rd was nearly as violent, but that 428 Cobra Jet engine would put down 8-10 ft of rubber at 75-80mph if you weren't careful with the clutch.
Thread Starter
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Senior User
Joined: Dec 2003
Posts: 306
Likes: 0
From: Palm Harbor, Florida
I'm really concerned, and here is why.....
They already lubed up my slip yoke, and it did not work. Now they are replacing the whole drive shaft on the 24th. No mention at all about the clutch packs, or replacing them. I'm worried that the clutch pack is all that needs to be replaced , not the whole drive shaft. Guess I will find out after the 24th.
Now if I can only get the damn grease off the inside windows (24th - in for the 4th time on that)
They already lubed up my slip yoke, and it did not work. Now they are replacing the whole drive shaft on the 24th. No mention at all about the clutch packs, or replacing them. I'm worried that the clutch pack is all that needs to be replaced , not the whole drive shaft. Guess I will find out after the 24th.
Now if I can only get the damn grease off the inside windows (24th - in for the 4th time on that)
New User
Joined: May 2004
Posts: 12
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I have known this mechanic for about 20 years, not just professionally. I know, maybe this is just his opinion, and we all know about opinions.
I am just going to research this thing a little more before doing a swap.
As far as slipping causing the shudder, is that it or is it the clutches grabbing and doing their thing that is causing the shudder?
I am just going to research this thing a little more before doing a swap.
As far as slipping causing the shudder, is that it or is it the clutches grabbing and doing their thing that is causing the shudder?
New User
Joined: May 2004
Posts: 12
Likes: 0
Originally Posted by Fcal
When properly engaging, a clutch should be almost un noticeable.
Remember learning to drive a stick. Shuddering experience
Remember learning to drive a stick. Shuddering experience
Also, if the clutch in the rear end was slipping, why would the dealer want to add friction modifier to see if it helps before changing the clutch pack?
Not trying to dispute anything, but want to make sure this fix is the right thing to do.