Why does Ford call for friction modifier in the Torsen?

[OkieSnuffBox]

Ideas?

 

[stkjock]

From Torsen - could apply

Torsen for GM vehicles:

Is it true that the Torsen unit in the production Camaro needs the GM modifier added?
GM issued a technical bulletin adding modifier to the rear axle oil. This was done to quiet what we call a "Rusty Screw" noise that we heard in a very small percentage of vehicles. This does not happen in all cases, however to address owner's concerns we asked that the modifier be used in all instances to insure that the driver would not get this noise. When replacing the fluid it is at the owner's discretion whether or not to add the modifier. Elimination of the modifier does not affect durability of the differential.

 

[jymontoya]

Ford must me mistaken... where did you see that?

 

[OkieSnuffBox]

It's on the additional card that comes with the Track pack cars.

I had to take it in for warranty work today (rear diff cover leaking at 770 miles) and then they called me after I took it home to say they hadn't put the friction modifier in and to bring it back sometime soon so they could.

I noticed it on the card when I bought the car but wondered, "Why?"

 

[kevinatfms]

friction modifier is a synthetic based lubricant that changes the friction properties of carbon based clutch packs. the use of the modifier during assembly allows the friction characteristics of the factory clutch packs to be masked allowing for less NVH during normal use.
also, companies like Redline and Royal Purple do not have the correct lubrication properties for correct Trac-Lok operation with out excessive NVH. this includes the worm gear type differential. shock loads can be masked just like the carbon clutch type screw gear noise.

its all about NVH, if you dont mind, you can skip it.

i also do not know the exact chemical composition but can find out if need be.(wasnt my field of expertise)

 

[OkieSnuffBox]

friction modifier is a synthetic based lubricant that changes the friction properties of carbon based clutch packs. the use of the modifier during assembly allows the friction characteristics of the factory clutch packs to be masked allowing for less NVH during normal use.
also, companies like Redline and Royal Purple do not have the correct lubrication properties for correct Trac-Lok operation with out excessive NVH. this includes the worm gear type differential. shock loads can be masked just like the carbon clutch type screw gear noise.

its all about NVH, if you dont mind, you can skip it.

i also do not know the exact chemical composition but can find out if need be.(wasnt my field of expertise)

We are talking about Torsen diffs.

 

[kevinatfms]

We are talking about Torsen diffs.

you didnt read enough. please go re read the entire post i had. shock loads on the torsen diff account for the majority of the noise associated with the worm gear type differential.

i was just stating that as with the carbon based clutch packs friction modifier can be used to reduce friction and shock loads based on the type of differential used. as in both cases, NVH is present no matter what type of differential is used and the synthetic lubricant needs to be used to quiet those types of noise, vibration or harness.

shock loads can attribute to gear clank and screw type noises, also a few instances where the gears themselves can give you hypoid gear whine depending on how well the unit was machined.

 

[OkieSnuffBox]

^Good info, thanks.

If it's really only an NVH issue, then I'm not too concerned.

It's not like I'd be able to hear the diff over the terrible clanking and slack in the trans/driveshaft.

 

[kevinatfms]

you may want to have it put in as they can and will void any and all warranty associated with said driveline piece due to improper maintenance requirements on behalf of the owner(you).

best bet is to just let them put in a bottle and call it a day, especially if you have the torsen. i would rather have some kind of warranty over saying whatever if something does go wrong while tracking it.

 

[OkieSnuffBox]

you may want to have it put in as they can and will void any and all warranty associated with said driveline piece due to improper maintenance requirements on behalf of the owner(you).

best bet is to just let them put in a bottle and call it a day, especially if you have the torsen. i would rather have some kind of warranty over saying whatever if something does go wrong while tracking it.

Could they void a warranty for a dealer doing a repair improperly?

But I'm going to take it by today or tomorrow to have them add it.

 

[jymontoya]

Good info here. Might be worth mentioning to them that the bottle is supposed to be added first then the gear oil. This helps make sure the additive is completely filled without overfilling the rear. If they just top it off with the additive, after already correctly filling the rear end with gear oil amount, it will be overfilled and start coming out the breather cap under normal driving conditions. Most Bullitts came from the factory without the proper additive and made bad moaning sounds on slow hard turns. The dealers often just topped off the additive following the TSB, which made a mess all over our new cars.

 

[kevinatfms]

if the dealer showed the warranty claim stating they notified you and you never came back after a substantial amount of time. this really only happens if the dealer is on the fence with FMC about warranty claims on drivelines.

 

[Department Of Boost]

Does the Track Pack have a T2 or a T2R?

From Torsen's site:

"The TORSEN T2-R takes the T-2's performance to the next level. By combining the patented Equvex gearing from the TORSEN T-2 with friction enhancing plates, the T-2R allows improved mobility an traction under the most extreme conditions. In addition, it is compatible with electronic traction control, providing the ultimate in traction management systems."

http://www.torsen.com/products/T-2R.htm

 

[ArizonaGT]

It's a T2, there are no wearing clutch packs, the only "plates" that are in the system are beefy 1/4" end plates. Those won't be wearing.

 

[Whiskey11]

I don't think there are clutch plates in the T2R either. Sam could confirm or deny that...

 

[Random Asshole]

Random useless fact of the day

i also do not know the exact chemical composition but can find out if need be.(wasnt my field of expertise)

I know when I was in school, it was made from whale sperm. They got tired of jacking off whales (and the god awful smell) so they started making it in labs.

 

[Department Of Boost]

It's a T2, there are no wearing clutch packs, the only "plates" that are in the system are beefy 1/4" end plates. Those won't be wearing.

I don't think there are clutch plates in the T2R either. Sam could confirm or deny that...

I thought I read somewhere that one of the Mustang models (or all of them) came with the T2R now??? 13’ GT500? BOSS? Regular Track Pack GT?

You can see the plates in the diagram below. As someone mentioned they do look thick, but what are they made of? If they are a standard friction material they will wear like any other clutch disc I would think??

All that being said I am running the T2R and per Rehagen's advice I used RP 75w140 (or whatever it is) with no friction modifier. Seems to be working great. Its got about 12K hard, hard miles on it.

I know when I was in school, it was made from whale sperm. They got tired of jacking off whales (and the god awful smell) so they started making it in labs.

Well that takes all the fun out of it!

 

[kevinatfms]

I know when I was in school, it was made from whale sperm. They got tired of jacking off whales (and the god awful smell) so they started making it in labs.

i swear i heard bigfoot farts and loch ness monster gills but i guess since those are a bit hard to come by the whale sperm would suffice.

 

[ArizonaGT]

You can see the plates in the diagram below.

These are the steel plates I was referring to. I've seen this disassembled in-person; they're not "clutches" like you would find in a traction-lok.

 

[Department Of Boost]

These are the steel plates I was referring to. I've seen this disassembled in-person; they're not "clutches" like you would find in a traction-lok.

No kidding, good to know. Thanks.