Quick question on M/T fluids - Ranger-Forums - The Ultimate Ford Ranger Resource


Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 01-10-2010
Member
Thread Starter
 
Join Date: Nov 2009
Location: Stockon, CA
Posts: 20
Quick question on M/T fluids

I've seen posts on several of the Ranger forums cautioning not to put ATF in the manual transmission if someone mistakenly had used gear oil previously. This is not an issue with my truck, but I find it curious. What is the reasoning behind this? Why wouldn't you just drain the gear lube and replace with the proper fluid?
Reply With Quote
  #2  
Old 01-10-2010
squrll's Avatar
Member
 
Join Date: Nov 2009
Location: fairfax va
Posts: 191
ATF is for Automatic trans nor a M/T
M/T take gear oil like 60 , 70, 80 wt
Kind of like a rear end take uasally 90wt
Reply With Quote
  #3  
Old 01-10-2010
Member
Thread Starter
 
Join Date: Nov 2009
Location: Stockon, CA
Posts: 20
I understand the differences in the two fluids. The specifications on my '93 call for ATF to be used in the M/T. My question refers to posts where people have warned others that once gear oil has been incorrectly been put in the tranny, that they should not drain and fill with the proper fluid - ATF.
Reply With Quote
  #4  
Old 01-15-2010
Member
 
Join Date: Sep 2006
Location: Chicago, Illinois
Posts: 5
Bump, I have a bad trans leak in my 91' MT. I recently put in 75W 90 and just found out that I should be using ATF. Now that half of the fluid has all leaked out again, I am looking to refill my trans. Should I use the same gear oil I previously used or should I refill with the proper ATF? The shifts are terrible with the gear oil and the trans takes forever to warm up and then the shifts get better. I am in Chicago and its January, so its pretty damn cold here. Thanks guys.
Reply With Quote
  #5  
Old 01-15-2010
DSFD506's Avatar
Member
iTrader: (2)
 
Join Date: Jul 2007
Location: Anderson, SC
Posts: 702
Quote:
Originally Posted by squrll View Post
ATF is for Automatic trans nor a M/T
M/T take gear oil like 60 , 70, 80 wt
Kind of like a rear end take uasally 90wt
Might wanna do some more research. Most manuals now use ATF. Mine does and even states in the manual. Some even use motor oil. As far as not using the other after one has been used has got me. I've never heard this before.
Reply With Quote
  #6  
Old 01-15-2010
TrePaul86's Avatar
Member
iTrader: (8)
 
Join Date: Apr 2007
Location: Gresham, OR
Posts: 1,369
I'm using Royal Purple ATF/MTF fluid in my truck with no problems!
Reply With Quote
  #7  
Old 01-17-2010
Reddog99's Avatar
Member
 
Join Date: Sep 2007
Location: Jamul, CA
Posts: 109
I don't see any reason to NOT switch back to ATF if gear oil has been used in the tranny. I would recommend that a drain & re-fill be performed several times after some miles to be sure all the gear oil is gone & not contaminating the new ATF.
Reply With Quote
  #8  
Old 01-17-2010
Redrocket's Avatar
Member
iTrader: (6)
 
Join Date: Jan 2007
Location: Waynesville n.c
Posts: 1,993
other way is if its got a cast iron case it takes gear oil....
If it has a Allumimum case it takes atf.
Reply With Quote
  #9  
Old 01-17-2010
chainfire's Avatar
Member
iTrader: (1)
 
Join Date: Oct 2007
Location: Mission B.C.
Posts: 3,126
Quote:
Originally Posted by Redrocket View Post
other way is if its got a cast iron case it takes gear oil....
If it has a Allumimum case it takes atf.


Wrong.

If its a Mitzubishi tranny it takes gear oil. And the Mitzu's are cast aluminum. So if your Ranger is from 85-92, there is a good chance it has it.

All other manual Rangers had the M5OD. This takes ATF fluid, and always has.
Reply With Quote
  #10  
Old 01-18-2010
Member
Thread Starter
 
Join Date: Nov 2009
Location: Stockon, CA
Posts: 20
Thanks for all your input. I've read several posts in the past stating, very vehemently, that once gear oil had been introduced that you couldn't go back. I didn't make any sense
to me then, and I haven't read anything here to change my mind.
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
(Stupid) Fluids Question TheRealestWhiteBoy General Ford Ranger Discussion 7 01-14-2011 11:09 AM
quick question about Brakecleen, need quick answer if possible 93rangerXLT4x4 Auto Detailing 101 15 11-28-2009 10:24 PM
Quick Trans question, need help quick dmathews 2.9L & 3.0L V6 Tech 0 11-15-2009 02:30 PM
quick question real quick dantheman General Ford Ranger Discussion 3 05-16-2009 01:52 AM
Transmission and Rear End Fluids? SonicRanger001 Drivetrain Tech 20 08-09-2005 04:39 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 12:04 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.