Moretorque
Dunce
Just wondering if I should add anything to the rear end because I believe in Snake Oil.
Is there any kind of additive you should add to rear when you changs fluid?
- Thread starter Moretorque
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ZWilson07
Cowboy
Depends on if you are limited slip, open, aftermarket ls, locker, and what fluid you went with.
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Moretorque
Dunce
I put some non synthetic 85 140 with some kinda additive for limited slip, I have a 350 2 wheel drive.
idiabuse
Full Access Member
its done, you did what they all do, how much was the gear oil a quart you bought?
ZWilson07
Cowboy
So do you have an open diff or factory limited slip?
Either way you will be fine since it had additive in it for the limited slip, just curious in case you wanted something else.
I always have Amsoil synthetic in my vehicles but that is just me. It is a justified "need" for me, but I understand that it isn't a need for everyone and I can respect that.
Moretorque
Dunce
I was going to go with a high$ syn but the parts guy said that only made a diff if you were pulling heavy loads around the country where heat builds up. I used Valvoline because that is what I had laying around.
I have some Moly and Teflon I can throw in it, I buy it in bulk and add it to oil because I am a cheap skate. I also have Pro Long but I quit using it because I heard it was chlorine based and would rot you stuff out even though it does make everything super slick.
I have some Moly and Teflon I can throw in it, I buy it in bulk and add it to oil because I am a cheap skate. I also have Pro Long but I quit using it because I heard it was chlorine based and would rot you stuff out even though it does make everything super slick.
HammerDown
Full Access Member
Unless I'm missing something, if it's a open rear no need for "limited-slip additive".
My Corvette is "limited slip/posi" with clutch-packs, and does require the preferred GM LS additive.
My 4x4 truck has an open rear...I just change it with regular Gear Oil.
Moretorque
Dunce
The guy at the parts counter asked me if it was 4 x 4 and I said no and he said I should run the additive?
jrad235
Full Access Member
Seems to me that very few 2wd SRW are Open, and very few 4wd SRW are Limited slip. I think he's ok.
Moretorque
Dunce
Thanks.
wildman7798
Full Access Member
Very few of any model trucks 2wd / 4wd / srw / drw are Trac Loc, it was and still is an option from the factory. It was added into some packages but for the most part it was it's own line item on the order sheet. After my years of scrounging and building I would guess it is about 2 out of 10 have a Trac Loc. My new to me 1994 10.25 3.55 Trac Loc is going under today and hopefully driving it out of the shop same day.
As the Trac Loc's get a little soft with age leaving out or adding less friction modifier will give you a little more bite. If you don't have enough it will tell you. In my mind, after you have a good running, driving truck the first most important thing is to get a Trac Loc.
ZWilson07
Cowboy
All I know is apparently the "parts guy" don't know **** and I would stay away from going to him for advice.
Also his comment that you don't "need" synthetic unless your towing heavy sounds like old school foolish logic as well. I get that everyone has different opinions and high end synthetics aren't always a "need." But fluids aren't where I look to save myself money, especially when considering some of the high end synthetics last so long that they actually come out to be the same price or cheaper then cheap stuff all while giving you better protection the entire time.
But like posted, you will be fine whether you have an open or limited slip since the additive is in it, I didn't see you post what you had. I wouldn't kill myself to go change the fluid super fast; id atleast get some use out of it before dumping for synthetic and that is coming from a huge synthetic guy. Just my 2 cents. If you are open diff you don't need additive but factory limited slip you do. But keep in mind that many of them have it already included with the gear oil, it just depends on what you buy.
If you go aftermarket set ups, usually it is best to check with the manufacturer of it because they occasionally don't recommend certain additives and such for their products.
Also his comment that you don't "need" synthetic unless your towing heavy sounds like old school foolish logic as well. I get that everyone has different opinions and high end synthetics aren't always a "need." But fluids aren't where I look to save myself money, especially when considering some of the high end synthetics last so long that they actually come out to be the same price or cheaper then cheap stuff all while giving you better protection the entire time.
But like posted, you will be fine whether you have an open or limited slip since the additive is in it, I didn't see you post what you had. I wouldn't kill myself to go change the fluid super fast; id atleast get some use out of it before dumping for synthetic and that is coming from a huge synthetic guy. Just my 2 cents. If you are open diff you don't need additive but factory limited slip you do. But keep in mind that many of them have it already included with the gear oil, it just depends on what you buy.
If you go aftermarket set ups, usually it is best to check with the manufacturer of it because they occasionally don't recommend certain additives and such for their products.
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