Any of you guys ever read the service manual??? I am not sure on the newer trucks when they switched to Dex 6 fluid. I think they state 100,000 miles on the fluid but the might recommend a filter replacement around 50,000 would have to look into that one to be sure.

On my 2000 and everything else I have owned that was Equipped with Dex 3 it states the following.

Automatic Transmission Fluid Replacement

Change automatic transmission fluid and filter Interval: Every 25,000 miles if the vehicle is driven under one or more of these severe conditions 1)In heavy city traffic 2)Where the outside temperature regularly reaches 90F or (32C) or higher 3)In hilly or mountainous terrain 4)uses such as police, commercial 5)frequent trailer pulling. If you do not use your vehicle under any of these conditions, change fluid and filter every 50,000 miles.

So knowing that most, if not all of us meet at least 1 or more of these conditions at any given time. It wouldn't hurt to at least drop the pan and change the filter every 25,000. If nothing else you can inspect the condition of things in the pan.


The reason a transmission starts slipping after a flush is because even though the clutch material is worn off, it's still suspended in the fluid helping whats left of the clutch's grab the steel's. When you flush the trans, you remove those particles and there is no longer anything to help the worn clutches grab.

 

Ok not changing it haha makes sense how it washes everything out so the old worn out parts wont grip with new fluid.

Is the servo going to make it shift tighter? Would this be slamming the gears harder which could cause damage on an old transmission?

 

It applies more surface area. In some cases it can make the shift feel firmer.

The servo itself won't damage the transmission.

 

What is this thing you call a Service Manual??

I use to pull my tranmission before it needed changing cause it was broke

i guess it i need to start gathering parts to change the fluid in my 80E..