Bronco Forum - Full Size Ford Bronco Forum banner

1 - 20 of 23 Posts
Joined
·
242 Posts
Discussion Starter #1
I'm going to put some gear oil in my axles because I haven't checked them since I bought the Bronco. Does it use 80-90W?

Also, the manual transmission uses ATF?
 

·
Nvr Been Bnnd
Joined
·
8,675,444 Posts
yes, and yes.
 

·
Roller rockers are gay
Joined
·
19,191 Posts
better you just yank the cover, and get a new gasket, and some friction modifier (in case you have a limited slip).

yes, the M5OD uses ATF.

also, fill in your bronco information, we have no idea what year truck you have or it's powertrain.

specs are found in the owners manual.

we also have a sticky thread in the noob forum (i think) that is ALL about transmissions, transfer cases, etc. read it.
 

·
Nvr Been Bnnd
Joined
·
8,675,444 Posts
just remove fill plug and fill until it starts to come out like an axle.
 

·
Roller rockers are gay
Joined
·
19,191 Posts
go read one of the differential stickies. read read read, learn learn learn. ;)
 

·
Nvr Been Bnnd
Joined
·
8,675,444 Posts
better you just yank the cover, and get a new gasket, and some friction modifier (in case you have a limited slip).

yes, the M5OD uses ATF.

also, fill in your bronco information, we have no idea what year truck you have or it's powertrain.

specs are found in the owners manual.

we also have a sticky thread in the noob forum (i think) that is ALL about transmissions, transfer cases, etc. read it.

He already knows this, he just trying to be funny. right Dr. F.
 

·
Roller rockers are gay
Joined
·
19,191 Posts

·
AKA: Butthead
Joined
·
2,857 Posts
75w90 is better for gas mileage. ;)
I use Mobil-1 gear oil
3.8= Dana 44 TTB
5.5= Ford 8.8"
7.0= Warner T18
7.0= Ford9inch
{pints!}

Redline MTL = synthetic ATF for manual transmissions
Ford sez: Mercon
3.4= ZF S5-42
3.8= Mazda-R2
2.0 = Warner 1356 Transfer Case
{quarts}
--------------------------

Yes. :)
The T18 and the ZF are both listed under Bronco in my '91 Spec Book.

Same with the service manual, I'm guessing the Bronco and F150 could
have been special ordered to have either one of those transmissions, if
you were willing to pay for it?

Alvin in AZ
 

·
Roller rockers are gay
Joined
·
19,191 Posts
alvin is that pints or quarts? because i know 5.5quarts of gear oil for the rear end is too much.
 

·
Registered
Joined
·
665 Posts
I used Mobil 1 75w90 its supposed to have the friction modifiers in it already according to the bottle. Just under 3 qrts. if I remember right.
 

·
AKA: Butthead
Joined
·
2,857 Posts
I used Mobil 1 75w90 its supposed to have the friction modifiers in it
already according to the bottle. Just under 3 qts. if I remember right.
That's the way they word it tho, huh. :/
Mobil-1 might work on a re-fill but didn't work on my-rebuilt Traction Lok.
I had to drive it to town to get some Sta-Lube friction modifier.

Alvin in AZ
 

·
Registered
Joined
·
665 Posts
Ok Alvin I think your right. After about a month with the Mobil 1 Ive noticed some strange sounds from the back end of the truck just from daily driving. So today I put some friction modifier in on top of the M 1. I read on the M 1 web sight that it has the friction modifier in it already BUT adding some would be fine. I will let ya know how it turns out. Thanks for the info as always.
1
 

·
AKA: Butthead
Joined
·
2,857 Posts
Explain how 75W90 is better for gas mileage over 80W90.
Cool. :)

Thinner oil is easier to move.
0w-20 engine oil is the same idea.

Not saying you can measure the mileage difference in a Bronco. ;)

I will tell ya that I could feel the difference between those 2 gear oil
weights in a '67 Bug. But way more was that 140 weight gear oil,
it was like syrup, it'd hardly let the "Junk Heap" roll on a warm day.
Example of too much the other direction, that. ;)

"a little does good, a little more does better" -friend's dad just before
he killed the trees and hedge we'd just spent two days planting ...he
was spreading ammonium sulfate when he said that LOL :)

Alvin in AZ
 

·
Registered
Joined
·
731 Posts
The 75W and 80W only mean something at 32 deg. F. 5W is not that much difference and is of NO difference above 32 deg F.

There is no direct comparison gear oil to motor oil.

AMSOIL said:
Gear oil differs from motor oil. Most people assume that SAE 90 gear oil is much thicker than SAE 40 or 50 grade motor oil. However, they are the same viscosity. The difference is they are calculated by different classifications, SAE gear lube and SAE engine oil. Another main difference is the additives used to produce them.
 

·
AKA: Butthead
Joined
·
2,857 Posts
The 75W and 80W only mean something at 32 deg. F. 5W is not
that much difference and is of NO difference above 32 deg F.
There is no direct comparison gear oil to motor oil.
There's not? LOL :)
Funny, these guys seem to think there is...
http://www.engineeringtoolbox.com/dynamic-absolute-kinematic-viscosity-d_412.html

Remember back to elementary school and how the true/false questions
could be recognized by looking for words like: always and never? :)

It worked then and it still works now. ;)

Alvin in AZ
 
1 - 20 of 23 Posts
Top