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Silverado 1994 5.0 4x2 Automatic Transmission Maintenance

Messages
7
Likes
4
Location
Santiago / Chile
Thread starter #1
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
 

Will L.

Well-Known Member
Messages
8,196
Likes
7,519
Location
Boulder City Nv
#2
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.
 
Messages
7
Likes
4
Location
Santiago / Chile
Thread starter #3
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?
 
Messages
7
Likes
4
Location
Santiago / Chile
Thread starter #8
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

Well-Known Member
Messages
1,407
Likes
1,405
Location
Miles City, Montana
#9
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.
 

THEFERMANATOR

FRANKENBURBAN
Staff member
Lead Moderator
Messages
9,192
Likes
2,680
Location
ZEPHYRHILLS FL
Staff #10
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.
 
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