2003 Tacoma: 80W-90 for Diff AND Transmission?

The owners manual for my 2WD recommends SAE 75W-90 for the 5-speed

For the differential it recommends Hypoid Gear Oil API GL-5 in either
SAE 90 (above 0 degrees F.), or SAE 80W or 80W-90 below zero.

I live in West Texas where the winters are mild and the summers hot.
Do you see any problem with using Quaker State 80W-90 GL-5 High
Performance Gear Lubricant (non-synthetic) for both the trans AND the
diff? The Quaker State label says it's suitable in applications
specifying API GL-5.

Just wondering how critical the weights are and whether using 80W-90
instead of 75W-90 constitutes a major change in lubricant
performance.

I had that same problem. I recommend you sell your vehicle immediately
and buy a new one.

Worked for me.

On Nov 17, 12:46*pm, Jew Hater > wrote:
> I had that same problem. I recommend you sell your vehicle immediately
> and buy a new one.
>
> Worked for me.



OK....thanks.

Now, does anyone out there who ISN'T 3 sheets to the wind care to
offer an informed opinion????????

Josh > wrote in news:60636811-db17-41f0-b150-
:

> The owners manual for my 2WD recommends SAE 75W-90 for the 5-speed
>
> For the differential it recommends Hypoid Gear Oil API GL-5 in either
> SAE 90 (above 0 degrees F.), or SAE 80W or 80W-90 below zero.
>
> I live in West Texas where the winters are mild and the summers hot.
> Do you see any problem with using Quaker State 80W-90 GL-5 High
> Performance Gear Lubricant (non-synthetic) for both the trans AND the
> diff? The Quaker State label says it's suitable in applications
> specifying API GL-5.
>
> Just wondering how critical the weights are and whether using 80W-90
> instead of 75W-90 constitutes a major change in lubricant
> performance.



The primary thing here isn't the weight, but hypoid versus non-hypoid.

Your diff *MUST* use hypoid lubricant.
Your transmission *MUST NOT* use hypoid lubricant.

And if you're forced into two different lubes anyway, you might as well use
the correct stuff in each.



--
Tegger

Tegger > wrote:
>
>Your diff *MUST* use hypoid lubricant.

This makes sense since it needs that high pressure additive.

>Your transmission *MUST NOT* use hypoid lubricant.

Why not? Why does the high pressure stuff do any harm? There aren't
any bronze bushings or anything, right?
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

On 11/17/2010 04:29 PM, Scott Dorsey wrote:
> > wrote:
>>
>> Your diff *MUST* use hypoid lubricant.
>
> This makes sense since it needs that high pressure additive.
>
>> Your transmission *MUST NOT* use hypoid lubricant.
>
> Why not? Why does the high pressure stuff do any harm? There aren't
> any bronze bushings or anything, right?
> --scott
>

a lot of synchros use brass or bronze cones. some gear journals too.

if synchros are "too lubricated", they don't sync, and gears grind.


--
nomina rutrum rutrum

On 11/17/2010 11:40 AM, Josh wrote:
> The owners manual for my 2WD recommends SAE 75W-90 for the 5-speed
>
> For the differential it recommends Hypoid Gear Oil API GL-5 in either
> SAE 90 (above 0 degrees F.), or SAE 80W or 80W-90 below zero.
>
> I live in West Texas where the winters are mild and the summers hot.
> Do you see any problem with using Quaker State 80W-90 GL-5 High
> Performance Gear Lubricant (non-synthetic) for both the trans AND the
> diff? The Quaker State label says it's suitable in applications
> specifying API GL-5.
>
> Just wondering how critical the weights are and whether using 80W-90
> instead of 75W-90 constitutes a major change in lubricant
> performance.

as others say, it's not simply a matter of weight. but the bottom line
is money - how much does a transmission or diff cost vs. a pint or two
of the correct grade lube?


--
nomina rutrum rutrum

"Scott Dorsey" > wrote in message
...
> Tegger > wrote:
>>
>>Your diff *MUST* use hypoid lubricant.
>
> This makes sense since it needs that high pressure additive.
>
>>Your transmission *MUST NOT* use hypoid lubricant.
>
> Why not? Why does the high pressure stuff do any harm? There aren't
> any bronze bushings or anything, right?
> --scott

Those EP lubricants, usually based on sulfur compounds, are as slick as owl
snot.
I dont think auto trannies are made with these in mind. Mechanical
gearboxes might
thrive on them.. Just my $.02 of uneducated comment.

hls > wrote:
>>
>> Why not? Why does the high pressure stuff do any harm? There aren't
>> any bronze bushings or anything, right?
>
>Those EP lubricants, usually based on sulfur compounds, are as slick as owl
>snot.
>I dont think auto trannies are made with these in mind. Mechanical
>gearboxes might
>thrive on them.. Just my $.02 of uneducated comment.

Yeah, I thought we were talking only mechanical gearboxes, not the
slushboxes. I don't see any reason why the EP additives would be bad
in a manual unless it did have bronze bushings for synchronizers or
the like... and if it did, they would be eaten away pretty fast...
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

On 11/17/2010 06:26 PM, Scott Dorsey wrote:
> > wrote:
>>>
>>> Why not? Why does the high pressure stuff do any harm? There aren't
>>> any bronze bushings or anything, right?
>>
>> Those EP lubricants, usually based on sulfur compounds, are as slick as owl
>> snot.
>> I dont think auto trannies are made with these in mind. Mechanical
>> gearboxes might
>> thrive on them.. Just my $.02 of uneducated comment.
>
> Yeah, I thought we were talking only mechanical gearboxes, not the
> slushboxes. I don't see any reason why the EP additives would be bad
> in a manual unless it did have bronze bushings for synchronizers or
> the like... and if it did, they would be eaten away pretty fast...
> --scott
>

ep additives wouldn't "eat" them away - it would lubricate the cone
clutches [in that kind of] synchro so they didn't clutch properly. if
they don't clutch, then the gear meshing dogs grind.

and please don't call automatics "slushboxes" - they're highly
sophisticated and [generally] highly accomplished pieces of engineering.
such a derogatory term is both inappropriate and perpetuates ignorance
about their operation.


--
nomina rutrum rutrum