what lubricant goes in a manual transmission? I

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by TowHaul, Apr 22, 2019.

  1. TowHaul

    TowHaul Medium Load Member

    406
    77
    Mar 7, 2016
    0
    i am told it is very siecific for a heavy duty manual transmission. Gear oil? Atf fluid? Sae 50?
     
    D.Tibbitt Thanks this.
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. buddyd157

    buddyd157 Road Train Member

    13,506
    34,549
    May 25, 2017
    under a shade tree
    0
    gear oil, like 90 weight in many.

    there is a possibility that yes, ATF fluid is used in some

    don't you have the owners manual?

    or, you could go to the dealership, with the VIN number and go directly to the parts dept and ask them.
     
    Dave_in_AZ, TowHaul and D.Tibbitt Thank this.
  4. TowHaul

    TowHaul Medium Load Member

    406
    77
    Mar 7, 2016
    0
    dealer said 50 weight atf but no one sells that in a quart. Not sure if "manual transmission fluid" is the same or if synthetic atf will work.
     
  5. Rideandrepair

    Rideandrepair Road Train Member

    17,201
    55,791
    Aug 8, 2015
    0
    ATF stands for automatic transmission fluid. Different from Manual fluid.Something doesn’t sound right. Synthetic is pretty much standard on all manual transmissions.Its sold by quart, gal.,and 5 gal.pails. Its usually usually 50 wt.
     
  6. buddyd157

    buddyd157 Road Train Member

    13,506
    34,549
    May 25, 2017
    under a shade tree
    0
    there was a time, (and i mean many years ago, when i wrenched) that Chrysler did use ATF in thier manual transmissions.

    yes, i know we are talking 2 different sized animals regarding transmissions, but the possibility exists that his particular transmission DOES take ATF.

    to the o/p, if this is what the dealership parts counterman said, then you will just have to suck it up and buy it by the gallon, or whatever amount it comes in for "over the counter" sales.

    to the o/p...DO NOT MIX the fluids...shifting will be HAARD, especially in cold weather, and too, the different fluids can screw up the internals...

    USE WHAT THEY CALL FOR, or you could toast your transmission, and that'll cost you more MONEY and downtime, then you'd ever care to even think about.
     
    Rideandrepair Thanks this.
  7. Rideandrepair

    Rideandrepair Road Train Member

    17,201
    55,791
    Aug 8, 2015
    0
  8. Dave_in_AZ

    Dave_in_AZ Road Train Member

    55,165
    369,833
    May 4, 2015
    0
    Gear oil.
     
  9. Rideandrepair

    Rideandrepair Road Train Member

    17,201
    55,791
    Aug 8, 2015
    0
    Those were first automatics still had a clutch
     
  10. buddyd157

    buddyd157 Road Train Member

    13,506
    34,549
    May 25, 2017
    under a shade tree
    0
    actually, i recall chrysler using ATF in thier manuals well past that year!

    Pat Goss from the tv show, Motorweek, doing double duty here for another company.

     
    Last edited: Apr 22, 2019
    BoxCarKidd and Rideandrepair Thank this.
  11. Rubber duck kw

    Rubber duck kw Road Train Member

    6,092
    17,685
    Dec 9, 2017
    0
    Should be a little tag on there somewhere, there usually like 50 weight for just a regular old manual transmission, talk to a truck shop they'll be able to tell you for sure.
     
    Rideandrepair Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.