T-45 tranny fluid

Discussion in 'The Garage' started by 1BAD96SVT, May 13, 2007.

  1. 1BAD96SVT

    1BAD96SVT Member

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    Which one to go with i would some good stuff, was thinking royal purple but read they arent the best for the t-45.. :dunno:
     
  2. warpspeed1414

    warpspeed1414 New Member

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    I went with the royal purple in mine and love it. My trans shifts so much better. Use to be a grind going from 4th to 5th. Its gone. Since then I'v put royal purple in the rear end and engine also. I like it.
     
  3. blackstangs281

    blackstangs281 New Member

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    I use Mobil 1 in mine.
     
  4. powerfreak

    powerfreak New Member

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    I used RP syncromax in mine...right after I changed it, it starting grinding a lot when it's cold. Once it warms up it shifts great. I might try switching back to the cheap stuff and see if it makes a difference...the grinding is annoying, never did it before.
     
  5. riored96gt

    riored96gt Active Member

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    Grinding? That's not good...and its probably not the fluid...

    I use the Royal Purple in everything, Synchromax in the T-45.
     
  6. scarface

    scarface Guest

    I use moble 1 also.
     
  7. Steeda98GT

    Steeda98GT New Member

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    So Royal Purple isn't good for the T-45??
     
  8. powerfreak

    powerfreak New Member

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    I don't know honestly. I've read opinions either way. I know on mine (111K miles, whiney input shaft bearing), when I put in RP syncromax it would grind when it was cold. It shifted GREAT once it warmed up. I drained out the $25 of RP and went back to the cheap stuff and now it's better. SO I think if you have a high mileage tranny, stay with the cheap stuff. If you have some tranny issues, don't expect RP to be a quick fix.
     
  9. SonicStang

    SonicStang Active Member

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    I used the stuff you get at Ford and added a little bit of friction modifier.
     
  10. riored96gt

    riored96gt Active Member

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    Friction modifier in the tranny????
     
  11. powerfreak

    powerfreak New Member

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    well...our tranny's take ATF...so who the hell knows. :dunno:

    I have heard of friction modifier in T45's though.
     
  12. MoonlightGT

    MoonlightGT Member

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    i rebuilt my t-45 2 years ago and put GM syncromesh fluid in it and it shifted great. Then i decided to flush and fill it cause it had been 2 years and i used Moblil 1 synthetic ATF and right after i changed the fluid i noticed if im cruising in 4th gear for a while and i push the clutch in , i cant get out of 4th!! it sticks for a few seconds then slips out. Im going to get some more GM syncromesh fluid and change it back.
     
  13. Jrgunn5150

    Jrgunn5150 Legend

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    I always used GM synchromesh in the T45, I use it in my current T56 too.
     
  14. Goldmember

    Goldmember Well-Known Member

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    Mmm... Synchromesh FTMFW I used it in one of my Camrys way back when and DAMN what a difference!

    Glad to hear our T45's like it too, guess I'm tossing some in. But my plan of attack is a little different...

    Should I-
    Go STRAIGHT TO Synchromesh
    or
    run ATF for 4-5K then dump it and go for Synchromesh?

    I don't know how long the fluid in the trans has been there, might be original. I'm leaning toward a cycle of ATF then Synch.
     
  15. Jrgunn5150

    Jrgunn5150 Legend

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    I would just go staight to synchromesh.