I've heard tell that the transmissions in trucks of this genre are kind of weak. Recently mine has started to slip a little........not a lot, but noticeably, especially when cold. The trans fluid IS dirty and smells a little (not a lot) cooked. Will a fluid/filter change etc help or is it toast?

 

Ooops................it has 128,000 on it.

 

I'd definitely change the fluid and filter. While you're in there adjust the bands too. It'll help out a lot.

 

Seems like with this milage and the problem that a fluid flush would be better than a simple fluid/filter change.... Yes?

 

If the fluid is contaminated (as you say it is dirty and smells burned), then you'll need to get it all out or it will become re-contaminated when the new fluid put into the pan mixes with what is in the TC, etc.

 

Thanks. that;s what I figured. Any input on addatives like duralube or slick 50 (or something else) with the new fuild? Years ago I had a Dakota that was slipping between 2nd & 3rd..........added some Duralube and it worked perfectly for another 40K (when the engine blew).....Also, any recomends on fluid brands?

 

You need to use ATF+4. I forget which brand I used, it was a full synth though.. I remember that much. If you take it to be flushed out, make sure you confirm that they refill with ATF+4.