Amsoil Severe Gear oil?

[GHarman]

Need to change out the oil in the differentials on "Old Ugly". They presently have Amsoil 80W-90. Been thinking about the new severe gear oil. Its been a few years since the oil has been changed. Any Amsoil experts out there that would care to comment on this? I will also call Amsoil tech support. Thanks,GregH

 

[GHarman]

Called tech support. They said no limit slip additive necessary. It is part of the additive package. Unless I spring a leak, It will be the last gear oil change fer "Old Ugly". GregH

 

[GMike]

I just changed my diff oil and used AMSOIL Severe Gear 75W-90. The instructions on the back says use the slip lock additive if chatter occurs. The last time I used AMSOIL back there it wasnt Severe Gear but it did chatter. So I just added the additive and all was well, I think these trucks have their own personallity as far as the additive goes. Some like it, some dont need it.



One thing I like about AMSOIL is that if swallowed you do not have to induce vomiting.



Mike

 

[GHarman]

Mike, Thanks for the input. Gonna do the rear diff as soon as the oil arrives, 75W-110. Will do the front diff next summer. Got some service left in that one. Had a leak and needed to replace an axle seal. GregH

 

[GHarman]

Update

After getting most all the issues and electrical gremlins cured and finally getting a little road time. The truck has chatter problems in the rear end when powering up and around a sharp turn on a hill (switchback). It is also noticeable when driving in town where you are required to make a sharp turn under power. I added one tube of friction modifier to the Severe Gear oil upon installation. I am going to call Amsoil, Monday, and see what they recommend? More Friction Modifier? I checked the tire pressure and matched the two rear tires very closely @ 50# running empty.



BTW, The mileage has not suffered in the least, still 19+ with mixed driving including 4X4, using Bio Diesel mixed with #2, winter blend. Will do more thorough mileage check after chatter problem is settled. GregH

 

[dpuckett]

If you chatter too long around corners, you'll be doing limited slip clutches. I have never had any luck adding friction modifier after the clutches start to chatter- I end up taking it apart and redoing the clutches. Good thing is they are REAL easy. Hardest part is crawling under there to get it all apart.



Daniel

 

[GHarman]

Changing Clutches?

Dan, That sounds like a project? Where do I get some information and a step by step, hand holding procedure to do this? Thanks! GregH

 

[GHarman]

Update

This was not a fair test of the Severe Gear oil. My Diff is rapidly going south and am looking to do a LS Clutch or a Dana Trac locker, Dont know which as yet. However I intend to reinstall the Amsoil Severe Gear oil. GregH