ford racing LS issues
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Laughing Gas
Joined: Mar 2009
Posts: 1,028
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From: long island
ford racing LS issues
I had a ford limited slip carrier and 3.55 gears installed about 6 months ago. its been great, but ive been pushing it in the snow the last 2 days. today I was stuck and kept going back and forth. I heard a clicking/chattering noise coming from the rear end. i had my friend drive for me while i listened to the drivers side rear tire. when the drivers side isn't spinning, it makes the noise. once it locks the noise goes away. do you think i cooked this carrier? it seems to be locking and unlocking at the right time. however if its real slick under the passenger tire, the drivers side tire is reluctant to lock.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Did you install the diff as it was delivered? They are setup pretty loose from the factory and the clutch packs do wear so it's possible you may need to service it now or maybe one of the clutch disks has been damaged.
Logistics Pro
Joined: Jul 2009
Posts: 3,635
Likes: 3
From: Lansdale, PA
Well a limited slip isn't a locker.... It is more of a friction locker.
The clicking you're hearing is either chunks floating around (most likely not) or just the sound of the clutch disks losing friction.
Was friction modifier added to the diff fluid. Without it there is the tendency for the LSD to be noisy when it slips.
If one tire is on ice and one is on dirt, it can still spin one tire. Because an LSD relies on friction to keep both tires connected, there is a certain point in which one will spin and the other wont. When one spins and the other doesn't, that's when the damage occurs. It's like slipping the clutch too much in a manual trans.
Other than the noise, its operating like it should. I'd have to say that you're not using synthetic diff fluid, or you don't have enough friction modifier in the diff fluid and that's why it's noisy.
The clicking you're hearing is either chunks floating around (most likely not) or just the sound of the clutch disks losing friction.
Was friction modifier added to the diff fluid. Without it there is the tendency for the LSD to be noisy when it slips.
If one tire is on ice and one is on dirt, it can still spin one tire. Because an LSD relies on friction to keep both tires connected, there is a certain point in which one will spin and the other wont. When one spins and the other doesn't, that's when the damage occurs. It's like slipping the clutch too much in a manual trans.
Other than the noise, its operating like it should. I'd have to say that you're not using synthetic diff fluid, or you don't have enough friction modifier in the diff fluid and that's why it's noisy.
Thread Starter
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Laughing Gas
Joined: Mar 2009
Posts: 1,028
Likes: 0
From: long island
Well a limited slip isn't a locker.... It is more of a friction locker.
The clicking you're hearing is either chunks floating around (most likely not) or just the sound of the clutch disks losing friction.
Was friction modifier added to the diff fluid. Without it there is the tendency for the LSD to be noisy when it slips.
If one tire is on ice and one is on dirt, it can still spin one tire. Because an LSD relies on friction to keep both tires connected, there is a certain point in which one will spin and the other wont. When one spins and the other doesn't, that's when the damage occurs. It's like slipping the clutch too much in a manual trans.
Other than the noise, its operating like it should. I'd have to say that you're not using synthetic diff fluid, or you don't have enough friction modifier in the diff fluid and that's why it's noisy.
The clicking you're hearing is either chunks floating around (most likely not) or just the sound of the clutch disks losing friction.
Was friction modifier added to the diff fluid. Without it there is the tendency for the LSD to be noisy when it slips.
If one tire is on ice and one is on dirt, it can still spin one tire. Because an LSD relies on friction to keep both tires connected, there is a certain point in which one will spin and the other wont. When one spins and the other doesn't, that's when the damage occurs. It's like slipping the clutch too much in a manual trans.
Other than the noise, its operating like it should. I'd have to say that you're not using synthetic diff fluid, or you don't have enough friction modifier in the diff fluid and that's why it's noisy.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
The Trac-Loc is adjustable to a certain extent, if you restack the clutch packs and shim it little tighter that puts more preload on the spring and you get more locking action and less free wheeling. This restack can be done in the vehicle too in about 30 minutes, just remove the pinion shaft, spider gears and clutch stacks, replace any worn or damaged disks, restack them in an alternating pattern which makes the whole stack a little larger which will preload the spring more and put it all back together with fresh fluid and friction modifier.
Logistics Pro
Joined: Jul 2009
Posts: 3,635
Likes: 3
From: Lansdale, PA
Do not use royal purple.
After oil analasys it seems as though it oxidizes easier than other oils in the rear diff.
After talking with a Schaeffer oil guy (fte member actually) he does not recommend RP in the rear diff from all of the analysis reports he has looked over.
Front diff would be ok i think but not rear.
I've got 6 quarts of RP sitting because of my disappointment. Royal purple is for racecars that get their fluids changed all the time, not daily drivers and work trucks.
After oil analasys it seems as though it oxidizes easier than other oils in the rear diff.
After talking with a Schaeffer oil guy (fte member actually) he does not recommend RP in the rear diff from all of the analysis reports he has looked over.
Front diff would be ok i think but not rear.
I've got 6 quarts of RP sitting because of my disappointment. Royal purple is for racecars that get their fluids changed all the time, not daily drivers and work trucks.
Thread Starter
|
Laughing Gas
Joined: Mar 2009
Posts: 1,028
Likes: 0
From: long island
The Trac-Loc is adjustable to a certain extent, if you restack the clutch packs and shim it little tighter that puts more preload on the spring and you get more locking action and less free wheeling. This restack can be done in the vehicle too in about 30 minutes, just remove the pinion shaft, spider gears and clutch stacks, replace any worn or damaged disks, restack them in an alternating pattern which makes the whole stack a little larger which will preload the spring more and put it all back together with fresh fluid and friction modifier.
Do not use royal purple.
After oil analasys it seems as though it oxidizes easier than other oils in the rear diff.
After talking with a Schaeffer oil guy (fte member actually) he does not recommend RP in the rear diff from all of the analysis reports he has looked over.
Front diff would be ok i think but not rear.
I've got 6 quarts of RP sitting because of my disappointment. Royal purple is for racecars that get their fluids changed all the time, not daily drivers and work trucks.
After oil analasys it seems as though it oxidizes easier than other oils in the rear diff.
After talking with a Schaeffer oil guy (fte member actually) he does not recommend RP in the rear diff from all of the analysis reports he has looked over.
Front diff would be ok i think but not rear.
I've got 6 quarts of RP sitting because of my disappointment. Royal purple is for racecars that get their fluids changed all the time, not daily drivers and work trucks.
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Logistics Pro
Joined: Jul 2009
Posts: 3,635
Likes: 3
From: Lansdale, PA
I ended up using valvoline synthetic gear oil (does not require the friction modifier)
After talking with Rich, he said valvoline was one of the oils that tested well.
I've sent numerous oil samples to Schaeffer and I truly trust their research and opinions. I've been on the phone with Rich (quite a while ago now) and he not once tried to sell me their product.
What you use is up to you. RP will be fine I'm sure, I don't know how long it took for the oil to break down, but the fact that it didn't last a year is unacceptable to me.
After talking with Rich, he said valvoline was one of the oils that tested well.
I've sent numerous oil samples to Schaeffer and I truly trust their research and opinions. I've been on the phone with Rich (quite a while ago now) and he not once tried to sell me their product.
What you use is up to you. RP will be fine I'm sure, I don't know how long it took for the oil to break down, but the fact that it didn't last a year is unacceptable to me.
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