If you're thinking of getting a TrueTrac...
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Joined: November 4, 2005
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I got the TT installed about 2 and half months ago and I notice the click click click ( almost like a bicycly chain or marbles ) type of sound when I am slowing down from about 25 to almost stopping. It's hard to hear it sometimes over the magnaflows, but I can hear it if I shut off the radio. Never really bothered me though. There is a slightest whine under acceleration from the 3.73 gears at about 45mph , but is also very low and quickly dissapears. Definitely not loud enough to be heard on the cell phone. I have heard a chatter at about 80-85 at times but then dissapears again above it and below it.
So far that's my experience with my particular setup. not really bothered by the sounds, but could see if it got much louder it being very annoying. I have however always heard that once you go with the Detroit products you can expect to hear them sounding little louder than you may sometimes expect - but the quality is outstanding when it comes to performing under stress. I love my TT in the rain , snow and especially on dry pavement . I am very anxious as well to see what response to Gearheads email is recv'd - nice job gearhead
So far that's my experience with my particular setup. not really bothered by the sounds, but could see if it got much louder it being very annoying. I have however always heard that once you go with the Detroit products you can expect to hear them sounding little louder than you may sometimes expect - but the quality is outstanding when it comes to performing under stress. I love my TT in the rain , snow and especially on dry pavement . I am very anxious as well to see what response to Gearheads email is recv'd - nice job gearhead
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Shelby GT350 Member
Joined: April 29, 2005
Posts: 2,133
Likes: 5
Originally posted by screaminyellin6@January 22, 2006, 8:28 PM
I got the TT installed about 2 and half months ago and I notice the click click click ( almost like a bicycly chain or marbles ) type of sound when I am slowing down from about 25 to almost stopping. It's hard to hear it sometimes over the magnaflows, but I can hear it if I shut off the radio. Never really bothered me though. There is a slightest whine under acceleration from the 3.73 gears at about 45mph , but is also very low and quickly dissapears. Definitely not loud enough to be heard on the cell phone. I have heard a chatter at about 80-85 at times but then dissapears again above it and below it.
So far that's my experience with my particular setup. not really bothered by the sounds, but could see if it got much louder it being very annoying. I have however always heard that once you go with the Detroit products you can expect to hear them sounding little louder than you may sometimes expect - but the quality is outstanding when it comes to performing under stress. I love my TT in the rain , snow and especially on dry pavement . I am very anxious as well to see what response to Gearheads email is recv'd - nice job gearhead
I got the TT installed about 2 and half months ago and I notice the click click click ( almost like a bicycly chain or marbles ) type of sound when I am slowing down from about 25 to almost stopping. It's hard to hear it sometimes over the magnaflows, but I can hear it if I shut off the radio. Never really bothered me though. There is a slightest whine under acceleration from the 3.73 gears at about 45mph , but is also very low and quickly dissapears. Definitely not loud enough to be heard on the cell phone. I have heard a chatter at about 80-85 at times but then dissapears again above it and below it.
So far that's my experience with my particular setup. not really bothered by the sounds, but could see if it got much louder it being very annoying. I have however always heard that once you go with the Detroit products you can expect to hear them sounding little louder than you may sometimes expect - but the quality is outstanding when it comes to performing under stress. I love my TT in the rain , snow and especially on dry pavement . I am very anxious as well to see what response to Gearheads email is recv'd - nice job gearhead
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Joined: October 14, 2005
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Originally posted by Jimp@January 22, 2006, 8:34 PM
Thanks for the info! Good to know that's it's normal. My next mod is going to be MAC headers and Magnaflow duals. Maybe that will drown it out! Honestly, it's not that loud. I'm just not used to it.
Thanks for the info! Good to know that's it's normal. My next mod is going to be MAC headers and Magnaflow duals. Maybe that will drown it out! Honestly, it's not that loud. I'm just not used to it.
WHAT?!?!?!?! WHAT DID YOU SAY?!?!? I CAN'T HEAR YOU?!?!?!?
(Turn TCS off. Wait for light. Squeal tires a little! SEE YA!)
Originally posted by Excepcion13@January 22, 2006, 9:15 PM
My TT has a very distinctive sound, as I mentioned to Jimp in a PM. Mine does NOT sound like stepping on a bag of marbles though. And it is not exactly gear whine, either. It just sounds good (Gearhead hit it right on the ... head?). However, I hardly ever hear it because I am that idiot at the light next to you making sure that you can hear my music over yours! New System of a Down, baby!
WHAT?!?!?!?! WHAT DID YOU SAY?!?!? I CAN'T HEAR YOU?!?!?!?
(Turn TCS off. Wait for light. Squeal tires a little! SEE YA!)
My TT has a very distinctive sound, as I mentioned to Jimp in a PM. Mine does NOT sound like stepping on a bag of marbles though. And it is not exactly gear whine, either. It just sounds good (Gearhead hit it right on the ... head?). However, I hardly ever hear it because I am that idiot at the light next to you making sure that you can hear my music over yours! New System of a Down, baby!
WHAT?!?!?!?! WHAT DID YOU SAY?!?!? I CAN'T HEAR YOU?!?!?!?
(Turn TCS off. Wait for light. Squeal tires a little! SEE YA!)
Thread Starter
Shelby GT350 Member
Joined: April 29, 2005
Posts: 2,133
Likes: 5
Originally posted by rygenstormlocke@January 22, 2006, 10:29 PM
LOL. I do the same thing, though mine is "AC/DC Thunderstruck" LOL.
LOL. I do the same thing, though mine is "AC/DC Thunderstruck" LOL.
I didn't say "heck", lol!
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Joined: September 19, 2005
Posts: 1,897
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Originally posted by Jimp@January 22, 2006, 4:08 PM
I suppose that's possible. I think that the bottom line is this: it's supposed to sound this way. My installer even said this. It bugs me, but only if I have the radio and fans off.
I suppose that's possible. I think that the bottom line is this: it's supposed to sound this way. My installer even said this. It bugs me, but only if I have the radio and fans off.
Ever ridden inside a 993 race car? The transmission and rear-end both make alot of noise... Its part of performance... I'll upgrade to the True Trac later.. Of course its much stronger than the FRPP...
With that said, I would embrace the whine of the TT as if it were your own.. You'll never hear of me complaining of noises... Unless its a noise I know is completely out of place..
Bullitt Member
Joined: July 7, 2005
Posts: 459
Likes: 1
From: Washington
Today (Thursday) I gave-up waiting for an E-mail reply from Detroit regarding my TrueTrac questions, so I called them on the phone to get the answers. Here is what I was told:
Question 1.) As I slow to a stop, I hear what sounds like a light chunking, like a metal wheel rolling over a metal track, only much softer. Is this from the parts that shuttle from side-to-side? I have started to call this the TrueTrac Shuffle.
Answer 1.) This noise is from the parts that slide from side-to-side. It is normal, and nothing is being damaged.
Question 2.) Providing that the TrueTrac Shuffle is a normal sound, would the use of the Ford stock lubricant (75W-140 without any friction modifier) be better than the Mobile 1 75W-140 LS fluid (which has a friction modifier)?
Answer 2.) The noise is made worse from the 75W-140 synthetic gear fluid. It doesn’t pull the heat away from the gears like natural gear oils do. Whenever we hear of noise problems from users, it is from the use of synthetic fluid. Use 80W-90 natural gear oil for colder climates (like Washington) and use 90W-140 gear oil for hotter climates. The Friction Modifier has no affect on wear and no affect on the noise that you hear.
Question 3.) Although I do have the provided oval TrueTrac label under my hood, I would like an exterior label to mount on my back window, which would match my Magnaflow label. They are white letter decals designed to go on the outside of the glass, and the main lettering is ¾†tall with accent lettering being 1&1/8†tall. Do you happen to make a label like this and if so, could I get one?
Answer 3.) As of August 2005, Eaton now owns Detroit, so technically, the TrueTrac is now an “Eaton TrueTracâ€. Eaton is very particular about advertisement decals, and also we haven’t heard of any white letter decals to match that description. They wouldn’t make the label because you ask for it.
My Comments:
For 1.) I do agree with his answer.
--> The noise does not indicate damage.
For 2.) I partially agree with his answer.
--> The 80W-90 and 90W-140 may indeed reduce noise, as they are both thicker than 75W-140 when cold. This would be especially noticeable from 0F to 60F ambient temperatures and during the vehicle warm-up period. Thicker oil makes the gears quieter.
--> Any single-viscosity number gear oil (like 90 with no “W†designation and no second number) is a natural oil. To keep the gear oil from thinning as quickly as the fluid warms, a synthetic is added. For example, a 90W-140 gear oil is a 90 weight gear oil stock with a synthetic additive. It behaves like a 90 weight gear oil at 0F, and synthetic additives keep it from thinning as quickly as it otherwise would. It therefore is as thick as a 140 single-viscosity gear oil at 212F.
--> 80W-90 has less synthetic added into it than would 90W-140, but it still has synthetic. Obviously, 75W-140 would have the most synthetic added, since it has the widest viscosity range.
--> I do not believe the heat-transfer rate is significantly different between any of these fluids, so I don’t think that is a valid explanation as to why one gear oil is noisier than another.
--> I do not accept that an additive that changes the friction of limited slip plates does not affect the lubricity of the fluid. I think the more lubricity, the better.
--> I think if you followed his advice and tried the 80W-90 or the 90W-140 fluids (depending upon your climate) that you wouldn’t hurt anything.
For 3.) no further comment.
My Plan:
I intend to buy the stock Ford 75W-140 fluid without Friction Modifier to see if it has any affect. My reasons for this are as follows:
--> I don’t think any damage is done to the TrueTrac with the stock Ford Fluid, either with or without Friction Modifier.
--> At hot summer temperatures, I want the protection of a 140 weight gear oil at 212F (which it might reach on a hot day after a very long drive). Even still, 140 at 212F is thinner than 75 at 0F, so I think I still like the idea of a wide-range viscosity index fluid.
Question 1.) As I slow to a stop, I hear what sounds like a light chunking, like a metal wheel rolling over a metal track, only much softer. Is this from the parts that shuttle from side-to-side? I have started to call this the TrueTrac Shuffle.
Answer 1.) This noise is from the parts that slide from side-to-side. It is normal, and nothing is being damaged.
Question 2.) Providing that the TrueTrac Shuffle is a normal sound, would the use of the Ford stock lubricant (75W-140 without any friction modifier) be better than the Mobile 1 75W-140 LS fluid (which has a friction modifier)?
Answer 2.) The noise is made worse from the 75W-140 synthetic gear fluid. It doesn’t pull the heat away from the gears like natural gear oils do. Whenever we hear of noise problems from users, it is from the use of synthetic fluid. Use 80W-90 natural gear oil for colder climates (like Washington) and use 90W-140 gear oil for hotter climates. The Friction Modifier has no affect on wear and no affect on the noise that you hear.
Question 3.) Although I do have the provided oval TrueTrac label under my hood, I would like an exterior label to mount on my back window, which would match my Magnaflow label. They are white letter decals designed to go on the outside of the glass, and the main lettering is ¾†tall with accent lettering being 1&1/8†tall. Do you happen to make a label like this and if so, could I get one?
Answer 3.) As of August 2005, Eaton now owns Detroit, so technically, the TrueTrac is now an “Eaton TrueTracâ€. Eaton is very particular about advertisement decals, and also we haven’t heard of any white letter decals to match that description. They wouldn’t make the label because you ask for it.
My Comments:
For 1.) I do agree with his answer.
--> The noise does not indicate damage.
For 2.) I partially agree with his answer.
--> The 80W-90 and 90W-140 may indeed reduce noise, as they are both thicker than 75W-140 when cold. This would be especially noticeable from 0F to 60F ambient temperatures and during the vehicle warm-up period. Thicker oil makes the gears quieter.
--> Any single-viscosity number gear oil (like 90 with no “W†designation and no second number) is a natural oil. To keep the gear oil from thinning as quickly as the fluid warms, a synthetic is added. For example, a 90W-140 gear oil is a 90 weight gear oil stock with a synthetic additive. It behaves like a 90 weight gear oil at 0F, and synthetic additives keep it from thinning as quickly as it otherwise would. It therefore is as thick as a 140 single-viscosity gear oil at 212F.
--> 80W-90 has less synthetic added into it than would 90W-140, but it still has synthetic. Obviously, 75W-140 would have the most synthetic added, since it has the widest viscosity range.
--> I do not believe the heat-transfer rate is significantly different between any of these fluids, so I don’t think that is a valid explanation as to why one gear oil is noisier than another.
--> I do not accept that an additive that changes the friction of limited slip plates does not affect the lubricity of the fluid. I think the more lubricity, the better.
--> I think if you followed his advice and tried the 80W-90 or the 90W-140 fluids (depending upon your climate) that you wouldn’t hurt anything.
For 3.) no further comment.
My Plan:
I intend to buy the stock Ford 75W-140 fluid without Friction Modifier to see if it has any affect. My reasons for this are as follows:
--> I don’t think any damage is done to the TrueTrac with the stock Ford Fluid, either with or without Friction Modifier.
--> At hot summer temperatures, I want the protection of a 140 weight gear oil at 212F (which it might reach on a hot day after a very long drive). Even still, 140 at 212F is thinner than 75 at 0F, so I think I still like the idea of a wide-range viscosity index fluid.
Cobra R Member
Joined: September 21, 2004
Posts: 1,664
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interesting. The place installing mine is going to be using ford fluid (not sure which weight, but im sure its 75w140 since that was factory). My 3.73 gears came in yesterday, im just waitin for the UPS guy to come with my truetrac lol
Thread Starter
Shelby GT350 Member
Joined: April 29, 2005
Posts: 2,133
Likes: 5
Originally posted by Gearhead@January 26, 2006, 3:51 PM
Today (Thursday) I gave-up waiting for an E-mail reply from Detroit regarding my TrueTrac questions, so I called them on the phone to get the answers. Here is what I was told:
<---sniiiip--->
Today (Thursday) I gave-up waiting for an E-mail reply from Detroit regarding my TrueTrac questions, so I called them on the phone to get the answers. Here is what I was told:
<---sniiiip--->
:worship:
Bullitt Member
Joined: July 7, 2005
Posts: 459
Likes: 1
From: Washington
The changeover to the stock Ford Fluid was a great success in the reduction of the “TrueTrac Shuffle†noise. I believe the noise has been reduced by about 80%! I purchase 2 quarts of the Ford Stock Fluid (75W-140, no friction modifier, Ford Part #XY-75W140-QL) for $18 per quart. To see a photo of my easy method to change the gear oil without having to remove the differential cover, please see this thread:
http://forums.bradbarnett.net/index.php?showtopic=43787
http://forums.bradbarnett.net/index.php?showtopic=43787
Bullitt Member
Joined: October 14, 2005
Posts: 264
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Originally posted by Gearhead@January 29, 2006, 2:19 AM
The changeover to the stock Ford Fluid was a great success in the reduction of the “TrueTrac Shuffle†noise. I believe the noise has been reduced by about 80%! I purchase 2 quarts of the Ford Stock Fluid (75W-140, no friction modifier, Ford Part #XY-75W140-QL) for $18 per quart. To see a photo of my easy method to change the gear oil without having to remove the differential cover, please see this thread:
http://forums.bradbarnett.net/index.php?showtopic=43787
The changeover to the stock Ford Fluid was a great success in the reduction of the “TrueTrac Shuffle†noise. I believe the noise has been reduced by about 80%! I purchase 2 quarts of the Ford Stock Fluid (75W-140, no friction modifier, Ford Part #XY-75W140-QL) for $18 per quart. To see a photo of my easy method to change the gear oil without having to remove the differential cover, please see this thread:
http://forums.bradbarnett.net/index.php?showtopic=43787
Cobra R Member
Joined: September 21, 2004
Posts: 1,664
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I have a hoist at my shop, but i also have a vacuum pump lol. I use both, makes the job really easy. Took bout 2 minutes to suck out the fluid (man was it dirty for 13k miles). Did it again at 20k (not that dirty). And it will be done yet again at 22k miles when i get my TT installed this week.
GT Member
Joined: September 4, 2005
Posts: 159
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Originally posted by BlackLX4.0@January 26, 2006, 4:53 PM
Wow, thanks for checking that out! I've kinda gotten used to the noise now, it's really not very loud. I guess I'll switch to 90W-140 come spring.
:worship:
Wow, thanks for checking that out! I've kinda gotten used to the noise now, it's really not very loud. I guess I'll switch to 90W-140 come spring.
:worship:
90W-140 gear oil for hotter climates -----Thats me. My truetrac is coming this Monday. I live in Atlanta so I can run this year round.
Bullitt Member
Joined: July 7, 2005
Posts: 459
Likes: 1
From: Washington
Originally posted by esorense@January 30, 2006, 8:41 PM
90W-140 gear oil for hotter climates -----
Thats me. My truetrac is coming this Monday. I live in Atlanta so I can run this year round.
90W-140 gear oil for hotter climates -----Thats me. My truetrac is coming this Monday. I live in Atlanta so I can run this year round.
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