Bus Conversions dot Com Bulletin Board
October 02, 2014, 03:30:46 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: This BB is intended for the sole purpose of sharing conversion and bus related information among visitors to our web site. These rules must be followed in order for us to continue this free exchange of info. No bad mouthing of any business or individual is permitted. Absolutely no items for sale are to be posted, except in the Spare Tire board. Interested in placing a classified or web ad, please contact our advertising dept. at 714-903-1784 or e-mail to: info@busconversions.com.

   Home   Help Forum Rules Search Calendar Login Register BCM Home Page Contact BCM  
Pages: [1]   Go Down
  Print  
Author Topic: Transmission and differential lubrication.  (Read 653 times)
Gordie Allen
Full Member
***
Offline Offline

Posts: 225



WWW

Ignore
« on: July 29, 2013, 05:29:45 PM »

I want to  change out the transmission and differential lube.  My manual was printed in 1958.  Are there better lubricants than those recommended in this 55 year old manual?  It recommends S.A.E 50 engine oil for the Spicer 4 speed transmission and S.A.E. 140 MIL-L-2105 for the differential.  I doubt that that the differential gear lube is even a current S.A.E standard.  What's the best product for each?
Logged

Augusta, MI
1956 4104
DD 671
luvrbus
Hero Member
*****
Offline Offline

Posts: 12595




Ignore
« Reply #1 on: July 29, 2013, 06:14:01 PM »

The military spec MIL-L-2105 is still a good spec those specs have worked for 55 years why change the old girl may not like change lol I found out the hard way some old seals don't care for the synthetic stuff
Logged

Life is short drink the good wine first
Gordie Allen
Full Member
***
Offline Offline

Posts: 225



WWW

Ignore
« Reply #2 on: July 29, 2013, 06:32:24 PM »

Since I have NO LEAKS, I'm not opposed to sticking to what works - if there's nothing better.
Logged

Augusta, MI
1956 4104
DD 671
robertglines1
steam nut
Hero Member
*****
Offline Offline

Posts: 4015





Ignore
« Reply #3 on: July 29, 2013, 06:45:14 PM »

FWIW  I changed one to SYN and could hear a hum I never had before.  Bob
Logged

Bob@Judy  98 XLE prevost with 3 slides --Home done---last one! SW INdiana
RJ
Former Giant Greenbrier Owner
Hero Member
*****
Offline Offline

Posts: 2824





Ignore
« Reply #4 on: July 29, 2013, 09:19:24 PM »

Gordie -

If it ain't broke, don't fix it?

 Shocked
Logged

RJ Long
PD4106-2784 No More
Fresno CA
bevans6
Hero Member
*****
Online Online

Posts: 4677


1980 MCI MC-5C




Ignore
« Reply #5 on: July 30, 2013, 02:51:02 AM »

Just remember that the spicer gearbox wants a non-hypoid oil while the differential wants a hypoid oil.  I use a SAE 50 synthetic transmission oil in my spicer but I'm sure it would be equally happy on normal SAE 50 engine oil.  I top up the differential with normal 85 -W140 diff oil.

Brian
Logged

1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Spicer 8844 4 speed Zen meditation device
Vintage race cars -
1978 Lola T440 Formula Ford
1972 NTM MK-4 B/SR
gus
Hero Member
*****
Offline Offline

Posts: 3516





Ignore
« Reply #6 on: July 30, 2013, 09:52:25 AM »

The oil specified for the Spicer is actually Aviation grade mineral oil, more commonly known as "break-in oil" because it has no additives or detergents. I use it in my trans even though it leaks a bit because I happen to have some I bought for an airplane by mistake. You can find this oil at any small airport. You have to be careful with older trans because modern additives can destroy brass and other type metal bushings.

The rear uses GL-4 non-extreme pressure, most modern vehicles use XP so GL4 is not easy to find.

This link will answer your questions; http://www.mobiloil.com/USA-English/MotorOil/Car_Care/AskMobil/GL-5_and_GL-4_Gear_Oil.aspx
Logged

PD4107-152
PD4104-1274
Ash Flat, AR
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!