My truck has a hard shift when it down shifts to either 1st or second gear. That is really the only time I notice it. Should I..... put some lucus trani lube in the trani?? If so what is the best way to do this? I have watched several videos just wanted to get some input from here. I checked the trani fluid cold and it was very full on the dipstick...
Truck mileage 168k

Thx for reading

 

What's a trani?

 

Service the Tranny.. Fluid and filter go from there.

 

already did. Probably 4-5k miles ago. Dealership did

 

why not include that in your first post... info helps us a lot. did it start after the dealer service ? and what does "very full" mean ? is it over full ?

 

it is past full but this is when the tranny is not warmed up if that makes a difference. I tried to pull the fill plug in the back "not warmed up" to add lucas there but fluid started coming out so I stopped

 

What fill plug in the back ?

 

I have a 2010 f150 5.4 with 6 speed tranny. The back of the tranny has a drain and fill plug. I checked the level from the dipstick toward the front of the tranny.

 

anybody?

 

Is your truck 4X4? The transfer case has a drain and fill plug but not the transmission.