Amsoil says their gear oils do not require any friction modifier additions but I swear I hear chatter when turning around for example and accelerating quickly at the same time. Is this possible in something with an engine with wimpy torque output (rotary in an RX-8)?
Amsoil SVG causing rear diff chatter?
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Unless they changed something recently they do require an additive for limited slip diff's. Here is a quote from their site "AMSOIL SEVERE GEAR® is compatible with most limited slip differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier additive."
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Has nothing to do with engine output.
AMSOIL SEVERE GEAR® is compatible with most limited slip differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier additive.
http://www.amsoil.com/storefront/svg.aspx
AMSOIL SEVERE GEAR® is compatible with most limited slip differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier additive.
http://www.amsoil.com/storefront/svg.aspx
Wimpy torque has nothing to do with it, the design of the diff/system does. Sometimes extra additive has to be added on some diffs, no matter what brand of gear oil you use.
The SVG is a very good gear oil and I would just add some extra LS additive to it. I believe Amsoil sells the additive or most decent parts stores will stock some.
The SVG is a very good gear oil and I would just add some extra LS additive to it. I believe Amsoil sells the additive or most decent parts stores will stock some.
Looks like I need to read up on what's going on back there. I assumed it was due to most of the torque being transferred to the inner wheel (one turning the smallest radius).
Thanks for the input I'll have to get some.
Until then I suppose I'll have to take it easy. It doesn't sound like a healthy thing going on back there.
Thanks for the input I'll have to get some.
Until then I suppose I'll have to take it easy. It doesn't sound like a healthy thing going on back there.
Have you gone to a large parking lot and done some slow figure eight's? Sometimes that helps to get all of the additive distributed where it needs to go.
Originally Posted By: chambers
Unless they changed something recently they do require an additive for limited slip diff's. Here is a quote from their site "AMSOIL SEVERE GEAR® is compatible with most limited slip differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier additive."
It has limited slip additive in it already, but in some applications you may to add more. I haven't seen anything yet that needed anything added to the SVG
Unless they changed something recently they do require an additive for limited slip diff's. Here is a quote from their site "AMSOIL SEVERE GEAR® is compatible with most limited slip differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier additive."
It has limited slip additive in it already, but in some applications you may to add more. I haven't seen anything yet that needed anything added to the SVG
No, I've not done that. I didn't add any yet. In fact I didn't order any when I bought the SVG because when I looked at the slip lock additive from them, it did say at the bottom of that page that Amsoil gear oils don't require it (I think they had a caveat to that basically saying that's not a universal truth).
This is the 2nd change I've made with the SVG though. The first change didn't have this issue.
This change done in July however does. But I have new, grippier tires which I assumed (perhaps wrongly) was contributing to whatever is going on back there causing the chatter.
This is the 2nd change I've made with the SVG though. The first change didn't have this issue.
This change done in July however does. But I have new, grippier tires which I assumed (perhaps wrongly) was contributing to whatever is going on back there causing the chatter.
I changed the rear diff oil in my 07 F150 to Severe Gear and it chattered when accelerating while turning. I added 1 bottle of Slip-Lok and did the figure-8's. 4 months later and it still chatters, albeit slight. Not impressed.
Originally Posted By: atc250r
I changed the rear diff oil in my 07 F150 to Severe Gear and it chattered when accelerating while turning. I added 1 bottle of Slip-Lok and did the figure-8's. 4 months later and it still chatters, albeit slight. Not impressed.
Which viscosity did you use?
I changed the rear diff oil in my 07 F150 to Severe Gear and it chattered when accelerating while turning. I added 1 bottle of Slip-Lok and did the figure-8's. 4 months later and it still chatters, albeit slight. Not impressed.
Which viscosity did you use?
Originally Posted By: atc250r
I changed the rear diff oil in my 07 F150 to Severe Gear and it chattered when accelerating while turning. I added 1 bottle of Slip-Lok and did the figure-8's. 4 months later and it still chatters, albeit slight. Not impressed.
If it is the same viscosity you were using before, one way to find out if its the gear oil or not is to change back to the brand you were using before. Not exactly the cheap thing to do but it beats ruining your rear.
I changed the rear diff oil in my 07 F150 to Severe Gear and it chattered when accelerating while turning. I added 1 bottle of Slip-Lok and did the figure-8's. 4 months later and it still chatters, albeit slight. Not impressed.
If it is the same viscosity you were using before, one way to find out if its the gear oil or not is to change back to the brand you were using before. Not exactly the cheap thing to do but it beats ruining your rear.
Most of folks on BITOG don't actually know about SAE J306 change, so they just talk 90-140. As is there are are only two viscosities and not even realizing the old 90 does not equal the new 90. We need to speak in actual 100° viscosity to make more sense.
Originally Posted By: Pablo
Which viscosity did you use?
75W-140, exactly what Ford calls for. There was only about 25,000 miles on the factory fill when I changed to Severe-Gear, and at the time it wasn't making any noise/chatter whatsoever.
Which viscosity did you use?
75W-140, exactly what Ford calls for. There was only about 25,000 miles on the factory fill when I changed to Severe-Gear, and at the time it wasn't making any noise/chatter whatsoever.
Originally Posted By: Pablo
Most of folks on BITOG don't actually know about SAE J306 change, so they just talk 90-140. As is there are are only two viscosities and not even realizing the old 90 does not equal the new 90. We need to speak in actual 100° viscosity to make more sense.
Hopefully his Amsoil rep told him. In this case I don't think that's the issue though.
Most of folks on BITOG don't actually know about SAE J306 change, so they just talk 90-140. As is there are are only two viscosities and not even realizing the old 90 does not equal the new 90. We need to speak in actual 100° viscosity to make more sense.
Hopefully his Amsoil rep told him. In this case I don't think that's the issue though.
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Could you run this by the "Higher-Ups" at Amsoil, Pablo? Am I expected to use a second bottle of Slip-Lok?
Originally Posted By: atc250r
Could you run this by the "Higher-Ups" at Amsoil, Pablo? Am I expected to use a second bottle of Slip-Lok?
I could but have you contacted your dealer?
Could you run this by the "Higher-Ups" at Amsoil, Pablo? Am I expected to use a second bottle of Slip-Lok?
I could but have you contacted your dealer?
Originally Posted By: Pablo
Originally Posted By: atc250r
Could you run this by the "Higher-Ups" at Amsoil, Pablo? Am I expected to use a second bottle of Slip-Lok?
I could but have you contacted your dealer?
No, I haven't. He's 400 miles away from me. (I'm working out of province). Since the OP has the same apparent problem as me, maybe posting an explanation/solution here would be the way to go.
I'm still a user and continue to purchase Amsoil products, but would like this problem addressed.
Originally Posted By: atc250r
Could you run this by the "Higher-Ups" at Amsoil, Pablo? Am I expected to use a second bottle of Slip-Lok?
I could but have you contacted your dealer?
No, I haven't. He's 400 miles away from me. (I'm working out of province). Since the OP has the same apparent problem as me, maybe posting an explanation/solution here would be the way to go.
I'm still a user and continue to purchase Amsoil products, but would like this problem addressed.
Originally Posted By: atc250r
Originally Posted By: Pablo
Originally Posted By: atc250r
Could you run this by the "Higher-Ups" at Amsoil, Pablo? Am I expected to use a second bottle of Slip-Lok?
I could but have you contacted your dealer?
No, I haven't. He's 400 miles away from me. (I'm working out of province). Since the OP has the same apparent problem as me, maybe posting an explanation/solution here would be the way to go.
I'm still a user and continue to purchase Amsoil products, but would like this problem addressed.
No problem. I will contact Amsoil Tech for you, but the OP used SVG, you used SVO. He didn't use any Slip-Lock. You used Slip-Lock. Totally different vehicles and applications. I cannot say they are related. Just makes the issue more fuzzy.
So you have a 2007 F150. Which engine?
Your limited slip differential - is it the 8.8", 9.75" or 10.25"?
Thanks,
Paul
Originally Posted By: Pablo
Originally Posted By: atc250r
Could you run this by the "Higher-Ups" at Amsoil, Pablo? Am I expected to use a second bottle of Slip-Lok?
I could but have you contacted your dealer?
No, I haven't. He's 400 miles away from me. (I'm working out of province). Since the OP has the same apparent problem as me, maybe posting an explanation/solution here would be the way to go.
I'm still a user and continue to purchase Amsoil products, but would like this problem addressed.
No problem. I will contact Amsoil Tech for you, but the OP used SVG, you used SVO. He didn't use any Slip-Lock. You used Slip-Lock. Totally different vehicles and applications. I cannot say they are related. Just makes the issue more fuzzy.
So you have a 2007 F150. Which engine?
Your limited slip differential - is it the 8.8", 9.75" or 10.25"?
Thanks,
Paul
Originally Posted By: Pablo
No problem. I will contact Amsoil Tech for you, but the OP used SVG, you used SVO. He didn't use any Slip-Lock. You used Slip-Lock. Totally different vehicles and applications. I cannot say they are related. Just makes the issue more fuzzy.
So you have a 2007 F150. Which engine?
Your limited slip differential - is it the 8.8", 9.75" or 10.25"?
Thanks,
Paul
Appreciate that Paul, but off the top of my head, I don't know the size of the diff, and I won't be able to tell you for a few weeks till I get home. And just for the record, I didn't add any friction modifier at the time I replaced the fluid. Once I noticed the chatter a day or two later, the Slip-Lok was then added.
No problem. I will contact Amsoil Tech for you, but the OP used SVG, you used SVO. He didn't use any Slip-Lock. You used Slip-Lock. Totally different vehicles and applications. I cannot say they are related. Just makes the issue more fuzzy.
So you have a 2007 F150. Which engine?
Your limited slip differential - is it the 8.8", 9.75" or 10.25"?
Thanks,
Paul
Appreciate that Paul, but off the top of my head, I don't know the size of the diff, and I won't be able to tell you for a few weeks till I get home. And just for the record, I didn't add any friction modifier at the time I replaced the fluid. Once I noticed the chatter a day or two later, the Slip-Lok was then added.
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