bad tranny

[95suburb]

I think my transmission might be bad it acts up only when its cold. Going into reverse it has a delayed engagement (when cold), and when the throttles pressed quarter way down it acts like its pressed all the way down(when cold). Shifts smooth and accurate when war. Sound like a bad tranny? Thanks in advanced.

[grancito]

You could try changing the oil strainer, it could be partly blocked and not allowing good oil flow when the oil is thick.

[95suburb]

Oo, Il check it out, thank you.

[grancito]

Also, hard shifting when cold can be caused by particles in the valve body. The valves stick, it is not a big job to drop the valve body and clean it out with gasoline, just note where the steel balls have to go back, about 5 of them above the metal plate. Put them back in place with vaseline.

[95suburb]

So after a few shops told me I need a new transmission, I took matters into my own hands and checked it out for myself. I was getting second gear starts, slipping out of overdrive, and the truck would slip into what seemed like neutral sometimes. I went into acme looking for an additive like "lucas" for my tranny and explained to them my issue. I told them I have the 4l80 and and they said, if maintained, the 4l80e is a 300k mile transmission. So i bought some dextron 3 and a bottle off lucas. When I checked my dipstick, while the truck was running, it was "dry"! I added the bottle of lucas to the transmission along with a little dextron 3 and the transmission shifts like its new. No more slipping and it goes right into gear even when the trucks cold (a problem I had before). It even seemd to run down the highway at a lower rpm. About 75mph at 2350. Just thought Id share the good news, with the money il save on not having to buy a transmission I can start buying other performance mods for my rig. :)

[JD_countryboy]

Glad to hear it was something cheap and simple.

[95suburb]

absolutely..... very impressed at how strong this truck runs at over 200k