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Discussion Starter #1
Hey guys

I have a little transmission issue ( i think). Car is an 04 GT 5spd, 9,000 miles

When the car is in 5th gear, and sometimes a little of 4th, there is a rattly sound that sounds something like a bad bearing. It is pretty bad when it is cold, and subsides a little when it is warm but is still very noticeable. its most noticeable while accelerating and decelerating, but still makes noise while at a constant speed. I've had the car for 2 years and got it with 2000 miles. I dont think it has changed much and has been doing this since then. It may have gotten slightly worse. Has anyone heard of similar problems with these cars? Car is bone stock, never abused.

Thanks in advance.
 

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At what speed? Sounds like you are possibley lugging it and the transmission will make a rattley noise. Its not good to do this.
 

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My car makes the exact same noise in 5th gear. It's like a crunchy bearing sound, like somethings rubbing or grinding. I've never had any problems with it and I never go into 5th until 50mph with 3.73's so it's not from stress. As soon as I put it in 5th the noise starts and only in that gear. Been dealing with this for a while now, hope we can both find out what this is. My trans was rebuilt 3 years ago also and I still have this problem.
 

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I've heard of the TR3650's having some type of problem with noise like this. Does the noise change at all if you apply slight clutch pressure?
 

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Discussion Starter #6
My car makes the exact same noise in 5th gear. It's like a crunchy bearing sound, like somethings rubbing or grinding. I've never had any problems with it and I never go into 5th until 50mph with 3.73's so it's not from stress. As soon as I put it in 5th the noise starts and only in that gear. Been dealing with this for a while now, hope we can both find out what this is. My trans was rebuilt 3 years ago also and I still have this problem.
Ever heard of anyone else having it? Your descritpion sounds identical to mine. I tried to capture it on video one day but the road noise is so loud in these cars it muffled it out, i may try again. Is yours worse (pretty dam bad) when its cold? This is mostly a summer/warm weather cruiser for me and i keep my windows down and don't notice it usually.
 

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Discussion Starter #7
I've heard of the TR3650's having some type of problem with noise like this. Does the noise change at all if you apply slight clutch pressure?
Is that the 03-04 cobra tranny? I have not tried that. Do you mean enough to slip it a little and raise the rpms, or not that much?

Thanks for the responses guys
 

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I've been running 500 hp at the wheels on mine since '04 and it doesn't make this noise. That's why I sudjested lugging. Ever changed the fluid and inspect for flakes?(bearing material, syncro brass, etc) But, mine does have the 3rd gear syncro problem.
 

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Discussion Starter #9
I've been running 500 hp at the wheels on mine since '04 and it doesn't make this noise. That's why I sudjested lugging. Ever changed the fluid and inspect for flakes?(bearing material, syncro brass, etc) But, mine does have the 3rd gear syncro problem.
I have not changed the fluid due to the mileage on it but had planned to do that soon do look for metal like you said.
 

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Mine makes a similar noise and it's very noticeable in 5th gear. I think it's the throwout bearing. But being that your car only has 9k miles on it, it's unlikely that the throwout bearing would be giving you problems.
 

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Is that the 03-04 cobra tranny? I have not tried that. Do you mean enough to slip it a little and raise the rpms, or not that much?

Thanks for the responses guys
I mean, while driving and it's making the noise, simply touch the clutch with slit pressure, not enough to disengage the clutch but enough to put pressure on the TOB.

Mine makes a similar noise and it's very noticeable in 5th gear. I think it's the throwout bearing. But being that your car only has 9k miles on it, it's unlikely that the throwout bearing would be giving you problems.

Even though the car only has 9k on it, it was clearly not driven so possibly the lube is gone and the rust is building on the TOB.
 

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Discussion Starter #12
one more thing i'd like to add. when the car is in neutral, and i release the clutch, i can hear a very slight bit of noise pickup from the tranny. Its pretty quiet and hard to hear, but it is quieter when the clutch is in. Is that another TOB symptom?
 

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The 3650 will make some whirring mainshaft noise in neutral with the clutch engaged, mine has done it since I've owned it--6 years and 135k miles.

One thing I would suggest is that you change the transmission fluid as it likely still has the factory fill of 3.8L--which is too much per TSB 04-26-13.

Also, though 9k miles is not a lot, 9 years is and the fluids (all of them, coolant, brake, power steering, tranny and rear-end) should be changed...
 

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Discussion Starter #14
The 3650 will make some whirring mainshaft noise in neutral with the clutch engaged, mine has done it since I've owned it--6 years and 135k miles.

One thing I would suggest is that you change the transmission fluid as it likely still has the factory fill of 3.8L--which is too much per TSB 04-26-13.

Also, though 9k miles is not a lot, 9 years is and the fluids (all of them, coolant, brake, power steering, tranny and rear-end) should be changed...
Mine makes more of this noise with the clutch disengaged
 

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I've got 94,000 miles on my 04 and its done the same exact thing in 5th gear since I got it (20,000 on it when I got it) it sounds like it comes from the back of the motor or front of the tranny in fifth gear and only when it's cold.
 

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Also, is there an aftermarket shifter? They definitely let more tranny noise in.
 

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Discussion Starter #18
I mean, while driving and it's making the noise, simply touch the clutch with slit pressure, not enough to disengage the clutch but enough to put pressure on the TOB.
I tried this earlier, it didn't seem to make a difference, from slight pressure to a fair amount of slip. Any other ideas?



I've been doing some reading on the tr3650 and have discovered some other odds and ends folks are dealing with on these transmissions.

First off would be the "notchy" feel many people seem to notice. And an occasion "almost grind" sound. I definitely feel this with mine (especially 2-3 shift ) and also a difficulty getting in reverse sometimes. From what I gather a TSB was issued sometime in the past lowering the fill capacity from 4 gt to 3.2 qt. I also read some conflicting views on what fill fluid. Manual says Mercon I believe, though many posted that Pennzoil/GM Synchromesh was the good stuff to use and did much help. Others posted that they spoke to tremec and were told the synchromesh is only ideal for aftermarket transmissions and not the 3650 (carbon synchros as opposed to brass?). Some of these posts are pretty dated so i'd like to ask again, what are you guys running for fluid and fill capacity?

I don't expect this would change my bad bearing sounds, but may make the all around shifting better. Fluid is stock so I assume is it 4 qts from the factory.

Thanks for the responses guys.
 

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According to alldatadiy, the amount of fluid should be 3.1 qt.

Here is the TSB to switch type of fluid:

--Truncated--

M/T - Mercon(R) V ATF Usage Information

TSB 06-26-1
01/08/07
MERCON ATF IS BEING REPLACED BY MERCON V
AS A SERVICE FLUID FOR SOME MANUAL
TRANSMISSIONS
FORD:
1981-2003 Escort
1984-1995 Thunderbird
1985-2007 Mustang
1985-1996 Bronco
1985-2007 Ranger
1986-1997 Aerostar
1991-2004 Explorer
1995-2007 F-150
1996-2007 F-Super Duty
2001-2003 Explorer Sport Trac, Explorer Sport
LINCOLN:
2001-2002 Lincoln LS
MERCURY:
1984-1995 Cougar
1987-1999 Tracer
ISSUE
MERCON(R) Automatic Transmission Fluid is being replaced by MERCON(R) V as the service fluid for manual transmissions originally requiring MERCON(R).
ACTION
Beginning immediately all manual transmission applications requiring MERCON(R) can now be serviced using MERCON(R) V or MERCON(R) Automatic Transmission Fluid or dual usage fluids labeled MERCON(R) / MERCON(R) V. After July 1, 2007, MERCON(R) Automatic Transmission Fluid will no longer be manufactured, therefore, availability of this fluid will continue until remaining inventory has been depleted.
 

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Video of this sound for reference?
 
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