How do i drain my MTX tranny fluid?

keeders08 · Post by **keeders08** » Wed Dec 09, 2009 4:09 am

charger440neon2.0l wrote:OK, maybe its like ingesting muratic acid to a neon BUT, the 1997 factory service manual on chapter 21 section 2 recommends mopar hypoid gear oil gl-4 75w-90 or 75w-85w
I do usually trust the recommendations provided that will not hurt my vehicle or a customers vehicle.
1997
And on ch. 21 sec. 37 of the 1995 fsm recommends mopar hypoid gear oil gl-4 75w-90
1995

I donno what kind i used exactly but i know its synthetic and made by Mobil 1 and that its somewhere along the lines of 75w

Post by **racer12306** » Wed Dec 09, 2009 8:01 am

You probably used a GL5. GL4 is a little harder to find.

DOHCRT · Post by **DOHCRT** » Wed Dec 09, 2009 5:52 pm

75wXX is the wrong lubricant for the T-350, period. I have never heard anyone claim that the FSM says to use 75w-90 gear oil. The correct factory-fill oil is Mopar MS.9417. This fluid is around 30w, much thinner than 75w90.

Drakito wrote:Gear oil over 75 weight is to thick and unable to sling up onto the passive oiling system or make it through the shafts, synchro damage is the most common result.

Post by **racer12306** » Wed Dec 09, 2009 6:45 pm

Just an FYI:

Motor oil weight designations are different than gear oil designations.

For instance:

Mobil 1 75w90 gear oil: 106 cSt @ 40*C/15.9 cSt @ 100*C
Mobil 1 15w50 motor oil: 131.2 cSt @ 40*C/18.1 @ 100*C
Mobil Delvac 1300 15w40: 114 cSt @ 40*C/15.0 cSt @ 100*C
Mobil 1 TDT 5w40: 100.4 cSt @ 40*C/14.9 cSt @ 100*C
Mobil 5000 10w40 motor oil: 102.1 cSt @ 40*C/14.55 cSt @ 100*C
Mobil 5000 10w30 motor oil: 68.7 cSt @ 40*C/10.4 cSt @ 100*C

So if you were to classify 75w90 in motor oil terms it would be roughly a 5w40 or a 10w40 oil.

keeders08 · Post by **keeders08** » Wed Dec 09, 2009 6:59 pm

racer12306 wrote:Just an FYI:

Motor oil weight designations are different than gear oil designations.

For instance:

Mobil 1 75w90 gear oil: 106 cSt @ 40*C/15.9 cSt @ 100*C
Mobil 1 15w50 motor oil: 131.2 cSt @ 40*C/18.1 @ 100*C
Mobil Delvac 1300 15w40: 114 cSt @ 40*C/15.0 cSt @ 100*C
Mobil 1 TDT 5w40: 100.4 cSt @ 40*C/14.9 cSt @ 100*C
Mobil 5000 10w40 motor oil: 102.1 cSt @ 40*C/14.55 cSt @ 100*C
Mobil 5000 10w30 motor oil: 68.7 cSt @ 40*C/10.4 cSt @ 100*C

So if you were to classify 75w90 in motor oil terms it would be roughly a 5w40 or a 10w40 oil.

Damn, this thread is def. turning into "Lessons In Lubricant" lol
I guess i shouldn't have been makin fun of my buddy's Wyotech lubricant class... lmao

Seriously, I'm learning a good bit..
and btw, the one guy showed us PICTURES of the recommended lubricant pages.. come on now. lol

Post by **racer12306** » Wed Dec 09, 2009 8:07 pm

I can answer a lot of questions on lubricants if you want. I did a lot of studying a couple years ago, I really need to get up to date on them though. I'm sure there has been some changes.

There are a few manual transmissions that call for a GL-4 75-90 or GL-4 80-90. No one on any Neon board has ever suggested a GL-4 for a Neon trans. The very large majority of manual transmissions require an engine oil, ATF or a manual transmission lubricant.

keeders08 · Post by **keeders08** » Wed Dec 09, 2009 9:03 pm

racer12306 wrote:I can answer a lot of questions on lubricants if you want. I did a lot of studying a couple years ago, I really need to get up to date on them though. I'm sure there has been some changes.

There are a few manual transmissions that call for a GL-4 75-90 or GL-4 80-90. No one on any Neon board has ever suggested a GL-4 for a Neon trans. The very large majority of manual transmissions require an engine oil, ATF or a manual transmission lubricant.

Yea, see I liked the idea of that Syncromesh or this stuff that was suggested on Allpar, i beleive.. somethin bout zinc? or some other shit? i cant remember

Post by **racer12306** » Wed Dec 09, 2009 9:19 pm

Don't try to overthink it, just go with the tried and true stuff.

Mopar fluid
AMSOIL MTF
Pennzoil Syncrhomesh
Redline MTL
Royal Purple Synchromax

and there's a few others

keeders08 · Post by **keeders08** » Wed Dec 09, 2009 9:23 pm

racer12306 wrote:Don't try to overthink it, just go with the tried and true stuff.

Mopar fluid
AMSOIL MTF
Pennzoil Syncrhomesh
Redline MTL
Royal Purple Synchromax

and there's a few others

I used Pennzoil full synthetic oil in my 04, seems only right to try out there syncromesh.

Post by **racer12306** » Wed Dec 09, 2009 9:31 pm

If you want the "best"

go with the AMSOIL MTF.

The synchromesh is not a synthetic fluid, if that is what you are aiming for. However, of all those fluid the Pennzoil is the most readily available.

charger440neon2.0l · Post by **charger440neon2.0l** » Thu Dec 10, 2009 12:33 am

I have never heard anyone claim that the FSM says to use 75w-90 gear oil.

thats why I took pictures.

I'm not saying for everyone to change it because the fsm says so. I'm just clarifying that since it does say so, that you shouldn't be afraid of it being in your transmission.

keeders08 · Post by **keeders08** » Thu Dec 10, 2009 3:27 am

charger440neon2.0l wrote:
I have never heard anyone claim that the FSM says to use 75w-90 gear oil.
thats why I took pictures.

I'm not saying for everyone to change it because the fsm says so. I'm just clarifying that since it does say so, that you shouldn't be afraid of it being in your transmission.

I beleive you dood, im just trying to get this all out in the open.. I wanna know these things, whats good and proven and even what the book says, to me, is good to go with.

Post by **racer12306** » Thu Dec 10, 2009 7:13 am

charger440neon2.0l wrote:
I have never heard anyone claim that the FSM says to use 75w-90 gear oil.
thats why I took pictures.

I'm not saying for everyone to change it because the fsm says so. I'm just clarifying that since it does say so, that you shouldn't be afraid of it being in your transmission.

If you use the stuff specified in the FSM then you probably shouldn't be afraid to use it.

But keeders didn't. GL-4 and GL-5 are very different.

keeders08 · Post by **keeders08** » Thu Dec 10, 2009 7:35 am

racer12306 wrote:
charger440neon2.0l wrote:
I have never heard anyone claim that the FSM says to use 75w-90 gear oil.
thats why I took pictures.

I'm not saying for everyone to change it because the fsm says so. I'm just clarifying that since it does say so, that you shouldn't be afraid of it being in your transmission.
If you use the stuff specified in the FSM then you probably shouldn't be afraid to use it.

But keeders didn't. GL-4 and GL-5 are very different.

excuse me if i sound like a smartass but what do GL-4/GL-5 stand for? I mean, its just letters a numbers to me right now...

Post by **racer12306** » Thu Dec 10, 2009 12:16 pm

lubrizol.com wrote:•API Category GL-4 designates the type of service characteristic of spiral-bevel and hypoid gears in automotive axles operated under moderate speeds and loads. These oils may be used in selected manual transmission and transaxle applications.

•API Category GL-5 designates the type of service characteristic of gears, particularly hypoids in automotive axles under high-speed and/or low-speed, high-torque conditions. Lubricants qualified under U.S. Military specification MIL-L-2105D (formerly MIL-L-2015C), MIL-PRF-2105E and SAE J2360 satisfy the requirements of the API GL-5 service designation.