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Tranny Amsoil Severe Gear oil problems

Discussion in '1st Gen. Tacomas (1995-2004)' started by Saint Paulian, Jan 31, 2010.

  1. Jan 31, 2010 at 2:28 PM
    #1
    Saint Paulian

    Saint Paulian [OP] Member

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    I purchased my tacoma in April 2009, 85,000 miles. I replaced the oil in the diffs, transmission, and transfer case with Amsoil severe gear 75-90. Everything has been fine till it got cold. When shifting between gears it seems I need to do it slower otherwise it either shifts hard or grinds the gears. Do other people have problems with this oil in the cold? What should I do to fix it?

    I crawled under the truck today to see where the trany oil level was at because the drain plug leaks a tiny bit. I took the fill plug out and oil started to come out. I thought it was weird so I let it continue to drain from the fill hole. I gave it 15 minutes. I looked at the oil that came out and there was air bubbles in it. I know this is not good. Do I need to add an anti-foaming agent to the oil? or change it out and use another brand? Any info will help.; Thanks
     
  2. Jan 31, 2010 at 3:50 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    FlimFlubberJAM
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    You may have had too much gear oil in it. Too much, and it will arreate, and loose its ability to o its job. I belive the tranny only takes 1.9 quarts of oil.
     
  3. Jan 31, 2010 at 5:37 PM
    #3
    bb609

    bb609 O.F.

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    I always used Redline MT-90 in my '03 and it helped a lot with shifting. Contrary to Chris' comments, I always overfilled by a half cup or so as it supposedly helped get the oil up into the synchros. From my own experience and many others I've read, they're overfilled a bit from the factory anyway.
     
  4. Jan 31, 2010 at 5:44 PM
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    08pretaco

    08pretaco Well-Known Member

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    I just put in 3 quarts in my 08 and the shifting characteristics have altered, idk if in a bad way but they have changed.
     
  5. Jan 31, 2010 at 7:22 PM
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    Saint Paulian

    Saint Paulian [OP] Member

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    Chris4x4. Do I drain out what I have and refill it with 1.9 qts? Will this fix the issue?
     
  6. Jan 31, 2010 at 7:34 PM
    #6
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    I would. You have to rule it out first. Then, See if it still behaves the same way.
     
  7. Feb 4, 2010 at 4:25 PM
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    Saint Paulian

    Saint Paulian [OP] Member

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    I picked up some Reline MT-90 today for the tranny. $10/qt not bad considering the dealer wanted $21/qt in bulk. I will be changing out the oil this weekend.

    I was wondering if a GL-5 is ok for the transfer case? I have read other posts that say GL-5 oils break down the bronze synchros, is this true?
     
  8. Feb 4, 2010 at 4:32 PM
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    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    GL-5 is fine for the Toyota manual tranny's, and T-case.
     
  9. Feb 4, 2010 at 4:56 PM
    #9
    Saint Paulian

    Saint Paulian [OP] Member

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    Thanks for the help.
     
  10. Feb 4, 2010 at 5:52 PM
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    tacomakid96

    tacomakid96 Lions Not Sheep

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    How many quarts of oil and what kind do I use the change the front and rear differentials??
     
  11. Apr 7, 2010 at 8:54 AM
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    Twirlin

    Twirlin Nature just gets the blow-by

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    Front Diff: 1.6 qt (3.2 pints) 75W-90 Severe Gear
    Rear Diff: (4x4 & Prerunner) 3 qt (6 pints) 75W-90 Severe Gear
    Transfer Case: 1.1 qt (2.2 pints)

    I personally use AMSOIL and have for years. I'm a preferred customer so I can get you a discounted price if you'd like.:D
     
  12. May 19, 2011 at 10:39 PM
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    randall117

    randall117 New Member

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    Hey kinda new to TW. I'm thinkin about doing the front, rear, and TC as well. I used amsoil when I had my ford. Do you see any major differences in your taco? I have a 2006 trd sport
     
  13. May 20, 2011 at 4:48 AM
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    kingston73

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    I just did all mine this spring and replaced some standard, cheap reg oil all around with mob. 1 synth and noticed an immediate difference. Easier shifting, about a 2 mpg better average, overall just seems much smoother. Just be warned, old gear oil STINKS, change it outside!
     
  14. Oct 22, 2015 at 11:27 AM
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    babylon5

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    Looking at the Amsoil application guide I think you should have used
    Amsoil Manual Transmission & Transaxle Gear Lube 75W-90 (GL-4).. in the transmission.

    They mention that the Server Gear GL-5 lube is to slippery for use in manual transmissions.
     
  15. Oct 23, 2015 at 8:57 AM
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    frizzman

    frizzman Well-Known Member

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  16. Oct 25, 2015 at 5:23 PM
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    TRVLR500

    TRVLR500 Well-Known Member

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    That's what I have in mine. The GL-4. I had the Redline MT-90 in there before and I haven't been able to tell the difference between the two. Fast shifting just isn't what these tranny's were designed for. I've got the GL-4 in the transfer case as well. I put the 75-110 in the front and rear diffs. I don't see where the difference between the 90 and 110 will ever come into play unless I go somewhere where it is really hot or start towing but it will be ready if i do.
     

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