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Silverado 1994 5.0 4x2 Automatic Transmission Maintenance

Discussion in 'All Other Transmissions' started by Rene Zamorano, Jul 8, 2016.

  1. Rene Zamorano

    Rene Zamorano New Member

    7
    4
    Jul 1, 2016
    Santiago / Chile
    Hi there,
    It would be great to count on your experience regarding Automatic Transmission.

    Year: 1994
    Miles: 90.000

    There´s no problem with it, just want to take good care of it.

    It´s OK anly change fluid and filter?
    How do I know the transmission model so I can buy the parts?

    Thanks
     
  2. Will L.

    Will L. Well-Known Member

    6,904
    4,920
    Jan 25, 2013
    Boulder City Nv
    Did you just buy the truck? If so, Do you have records of the maintenence and repairs done by the previous owner?

    In my experience, automatic transmissions that have went over 75,000 miles without a filter and fluid change last longer by not adding new fluid. What happens is the new fluids have detergent in them that causes the old material and debris to wash out to the pan. Then that material pluge the screen and ruins the transmission.

    If you do start replacing the filter and fluid, I suggest getting it flushed and replace the filter 2 times at 2500 mile interval, then regular drain and filter 4 times at 5,000 mile intervals. Then start servicing again nomal intervals.

    I have seen many transmissions run 250,000 miles with no services done, as long as the truck is not towing heavy weight.
     
    MrMarty51 and Rene Zamorano like this.
  3. Rene Zamorano

    Rene Zamorano New Member

    7
    4
    Jul 1, 2016
    Santiago / Chile
    Thanks Will,

    I don't have any record, but so far it Works good, the only time when I feel something is when I stop the truck fast. I already change the transmission support. Kind it happen when pass from 4th to 1th at once because when I stop it in a long distance allowing the transmission to shift from 4th to 1th passing 3th and 2d nothing happen.

    Why do you think this could be?
     
  4. Will L.

    Will L. Well-Known Member

    6,904
    4,920
    Jan 25, 2013
    Boulder City Nv
    Can you make a video of it while you drive so we can see it?

    There are a bunch of guys on here better with trans than me btw.
     
    MrMarty51 likes this.
  5. Rene Zamorano

    Rene Zamorano New Member

    7
    4
    Jul 1, 2016
    Santiago / Chile
    Is hard to make a video because it's when you're driving it and it feels like a little push.
     
    MrMarty51 likes this.
  6. ak diesel driver

    ak diesel driver 6.5 driver

    12,342
    2,042
    Feb 7, 2009
    alaska
    sure its not a little bit of brake fade?
     
    MrMarty51 likes this.
  7. Rene Zamorano

    Rene Zamorano New Member

    7
    4
    Jul 1, 2016
    Santiago / Chile
    No, is like there were a problem with the transmission support, but it's new.
    And it happen only when pass from 3d or 4th to 1st stopped, running it's doesn't move
     
    MrMarty51 likes this.
  8. Rene Zamorano

    Rene Zamorano New Member

    7
    4
    Jul 1, 2016
    Santiago / Chile
    There,s a problem with my Differential Pinion Bearing. It's not a problem yet, but in time it will be.
    I've been looking for the parts, but according to my VIN N° and the service part label it should be a GU6 drivetrain, the issue is that those came in 9,5 and 8,5. Does anyone know how to find the correct one without the sample?

    I don't want to pull appart anything not been sure about it because here (Chile) is really hard to find parts...

    Thanks
     
    MrMarty51 likes this.
  9. MrMarty51

    MrMarty51 Well-Known Member

    962
    689
    Aug 1, 2017
    Miles City, Montana
    The transmission should be a 4L60E, if it built to American specs.
    It is kind of tough measuring the ring gear ith te cover removed from the differential, but, You should be able to get it close enough.
     
  10. THEFERMANATOR

    THEFERMANATOR FRANKENBURBAN Staff Member Lead Moderator

    8,820
    2,021
    May 9, 2008
    ZEPHYRHILLS FL
    Count the bolts in the differential cover. If it has 10 bolts it is an 8.5", if it has 14 bolts it will be a 9.5". The 9.5" semi floating 14 bolt only came in 1500's ordered with the camper package. Very few gas powered 1500's got the 9.5", and I can't say I've ever seen one in a 5.0l truck, only ones with a 5.7l or diesel.
     
    MrMarty51 likes this.
  11. 3500GMC

    3500GMC What T F, over

    5,425
    507
    Jun 7, 2009
    Nashport, Ohio
    And remember the 454SS? Oh what a powerhouse. Lol (i think they were the 9.5/14 been a while)
     
    MrMarty51 likes this.
  12. MrMarty51

    MrMarty51 Well-Known Member

    962
    689
    Aug 1, 2017
    Miles City, Montana
    Neighbor acroos the street had one for a while, that thing just looked fast, after He fired it up, it sounded real fast too. LOL
     
    Jaryd likes this.
  13. THEFERMANATOR

    THEFERMANATOR FRANKENBURBAN Staff Member Lead Moderator

    8,820
    2,021
    May 9, 2008
    ZEPHYRHILLS FL
    Completely forgot about that one, but yes, they were a 5 lug 9.5" 14bolt semi floater. The rarest of the rare as GM did not make many 9.5" 14 bolts with the 5 lug wheel pattern.
     
    MrMarty51 likes this.

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