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Transmission oil for a 47 non synchronized 4 speed #4728206
04/15/18 07:52 PM
04/15/18 07:52 PM
Joined: May 2015
Posts: 20
NJ
preaction Offline OP
preaction  Offline OP

Joined: May 2015
Posts: 20
NJ
I have a 47 Dodge power wagon with a 4 speed non synchronized 4 speed trans the shop manual calls for a 80w/140 oil. I have been reading some have been using a synthetic 50w oil as a replacement. I believe being a non syncro trans that a yellow metal compatible oil is not a concern so is it possible to get better performance from a modern 50w than the 80w/140 ?

Re: Transmission oil for a 47 non synchronized 4 speed [Re: preaction] #4728216
04/15/18 07:56 PM
04/15/18 07:56 PM
Joined: Dec 2012
Posts: 562
Cave City KY
jakewells Offline
jakewells  Offline

Joined: Dec 2012
Posts: 562
Cave City KY
just use any modern 80w90 or 75w140 i personally wouldn't use a 50 weight oil in the transmission.


1994 Ford F150 302 4R70
Chevron Delo SAE 30 CF/SL Fram XG8A

1978 Chevy Nova 250 I6 Borg Warner T5
Rotella 10W40 Fram XG5

Re: Transmission oil for a 47 non synchronized 4 speed [Re: preaction] #4728238
04/15/18 08:19 PM
04/15/18 08:19 PM
Joined: Jun 2003
Posts: 18,407
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline

Joined: Jun 2003
Posts: 18,407
Deplorable in apple valley, ca
Sae 50 would be close to what it used when new.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Transmission oil for a 47 non synchronized 4 speed [Re: preaction] #4728278
04/15/18 08:51 PM
04/15/18 08:51 PM
Joined: Jun 2013
Posts: 1,825
Virginia
mattwithcats Online sleepy
mattwithcats  Online Sleepy

Joined: Jun 2013
Posts: 1,825
Virginia
Take a look ar Mobil 1 Delvac 50.

About 90 weight GL-4 gear oil...

https://www.mobil.com/English-US/Commerc...ission-Fluid-50


2009 Smart Pure
Pennzoil Platinum Euro 0W-40, Purolator Synthetic PSL 14610, 45 mpg...
185/55R15 General HP tires, "H" speed rated, 44 psi (300 kpa)
Re: Transmission oil for a 47 non synchronized 4 speed [Re: preaction] #4728284
04/15/18 08:54 PM
04/15/18 08:54 PM
Joined: May 2015
Posts: 20
NJ
preaction Offline OP
preaction  Offline OP

Joined: May 2015
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NJ
The Delvac 50 was the product I saw being used in place of the 80w90. Its pricey too.

Re: Transmission oil for a 47 non synchronized 4 speed [Re: preaction] #4728382
04/16/18 12:06 AM
04/16/18 12:06 AM
Joined: Jun 2002
Posts: 19,749
Iowegia - USA
MolaKule Offline
Global Moderator
MolaKule  Offline
Global Moderator

Joined: Jun 2002
Posts: 19,749
Iowegia - USA
This one of the rare cases in which I would recommend this for older transmissions:

http://www.crcindustries.com/products/api-gl-4-multi-purpose-gear-oil-1-gal-SL24239.html

I am not sure how your old seals would respond take to the seal conditioning of something such as Redline MT-90 or Amsoil MTG.


"I can't change the direction of the wind, but I can adjust my sails to always reach my destination." Jimmy Dean
Re: Transmission oil for a 47 non synchronized 4 speed [Re: Chris142] #4728424
04/16/18 03:50 AM
04/16/18 03:50 AM
Joined: Dec 2002
Posts: 42,625
New Jersey
JHZR2 Offline
Global Moderator
JHZR2  Offline
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New Jersey
Originally Posted By: Chris142
Sae 50 would be close to what it used when new.




Wouldnt hit the 140 requirement though unless the API gear oil ranges have shifted with time.

Re: Transmission oil for a 47 non synchronized 4 speed [Re: JHZR2] #4728428
04/16/18 04:14 AM
04/16/18 04:14 AM
Joined: Sep 2015
Posts: 2,559
Malaysia
zeng Offline
zeng  Offline

Joined: Sep 2015
Posts: 2,559
Malaysia
Originally Posted By: JHZR2


Wouldnt hit the 140 requirement though unless the API gear oil ranges have shifted with time.

Exactly.
An OEM xW140 of that era would've a [email protected]*C range from 320 cSt to 748 cSt.

Re: Transmission oil for a 47 non synchronized 4 speed [Re: zeng] #4728469
04/16/18 06:28 AM
04/16/18 06:28 AM
Joined: Mar 2010
Posts: 1,424
USA
SOHCman Offline
SOHCman  Offline

Joined: Mar 2010
Posts: 1,424
USA
Originally Posted By: zeng
Originally Posted By: JHZR2


Wouldnt hit the 140 requirement though unless the API gear oil ranges have shifted with time.

Exactly.
An OEM xW140 of that era would've a [email protected]*C range from 320 cSt to 748 cSt.


So you are saying a 140 like this may work because the specs have changed over the years?

Edit: oops nevermind, I need more coffee coffee

Last edited by SOHCman; 04/16/18 06:30 AM.

I urge people not to wait 100K to change out the fluid in their transfer case units. -Kestas
Re: Transmission oil for a 47 non synchronized 4 speed [Re: SOHCman] #4728798
04/16/18 12:08 PM
04/16/18 12:08 PM
Joined: May 2015
Posts: 20
NJ
preaction Offline OP
preaction  Offline OP

Joined: May 2015
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NJ
Does this being a straight cut gear transmission make any difference ?

Re: Transmission oil for a 47 non synchronized 4 speed [Re: preaction] #4729181
04/16/18 06:54 PM
04/16/18 06:54 PM
Joined: May 2015
Posts: 20
NJ
preaction Offline OP
preaction  Offline OP

Joined: May 2015
Posts: 20
NJ
https://lucasoil.com/media/k2/galleries/369/10146_Syn50wtTrans_800x950.jpg This also was recommended but again its 50 weight.

Re: Transmission oil for a 47 non synchronized 4 speed [Re: SOHCman] #4729194
04/16/18 07:03 PM
04/16/18 07:03 PM
Joined: Sep 2015
Posts: 2,559
Malaysia
zeng Offline
zeng  Offline

Joined: Sep 2015
Posts: 2,559
Malaysia
Originally Posted By: SOHCman
Originally Posted By: zeng
Originally Posted By: JHZR2


Wouldnt hit the 140 requirement though unless the API gear oil ranges have shifted with time.

Exactly.
An OEM xW140 of that era would've a [email protected]*C range from 320 cSt to 748 cSt.


So you are saying a 140 like this may work because the specs have changed over the years?

Edit: oops nevermind, I need more coffee coffee

This StaLube ISO 460 gear oil fell under SAE xW140 of that era, and
It falls under modern day SAE xW140, therefore .....
absolutely yes , if OP wishes so. Coffee2

Re: Transmission oil for a 47 non synchronized 4 speed [Re: preaction] #4729200
04/16/18 07:08 PM
04/16/18 07:08 PM
Joined: Sep 2015
Posts: 2,559
Malaysia
zeng Offline
zeng  Offline

Joined: Sep 2015
Posts: 2,559
Malaysia
Originally Posted By: preaction
Does this being a straight cut gear transmission make any difference ?

Straight cut gears has less severe sliding action, vis-a-vis high off-set hypoid gears.
Hence ,no difference here.

Re: Transmission oil for a 47 non synchronized 4 speed [Re: zeng] #4729880
04/17/18 12:47 PM
04/17/18 12:47 PM
Joined: May 2014
Posts: 3,942
Columbus,Nebraska
Yah-Tah-Hey Offline
Yah-Tah-Hey  Offline

Joined: May 2014
Posts: 3,942
Columbus,Nebraska
Originally Posted By: zeng
Originally Posted By: preaction
Does this being a straight cut gear transmission make any difference ?

Straight cut gears has less severe sliding action, vis-a-vis high off-set hypoid gears.
Hence ,no difference here.
Easy application. Simple as it gets.

Re: Transmission oil for a 47 non synchronized 4 speed [Re: preaction] #4730268
04/17/18 06:33 PM
04/17/18 06:33 PM
Joined: May 2015
Posts: 20
NJ
preaction Offline OP
preaction  Offline OP

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NJ
Thanks for all of your responses.

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