shifting slipping?

[bgranger7]

i replaced my tranny about five thousand miles ago. the engine has less than 25,000 miles on it. all was running well and smooth until i towed our bayliner boat a few weeks back.
its a 4.0 automatic.
shifts smooth until i hit about 40-50mph, then it shifts abrubtly, and the rpms sky up a little bit, then back down after an instant.

any feedback would be great. just wondering if theres anything i can look into myself or if i should just take it in?

 

[Big Jim M]

Check fluid level. Towing heats up the tranny and the fluid can boil out the overflow.. If that don't do it then swap in a new filter.. Towing might have partially stopped it up, or it just might be time anyway.
Big JIm

 

[bronco_lou]

did you do any of the towing in OD?

 

[wahl_7s]

did you rebuild it or just swap for another trans and why with only 25000 on the truck? if there is only 5000 on a rebuild i would go collect on the warranty! the computer is trying to compensate for an abnormality in the trans. has it continued after normal driving?

 

[bgranger7]

...

hi thanks for the replies. sorry it took so long to get back.

the fluids looked good. the filter was replaced when the tranny was.

and yes i did have it in OD for some time while i was towing the boat..

ill have to check into the warranty..but it was a rebuilt tranny i had put in so i doubt they will do anything for me without it costing me.

and yes it has still been doing it, ive noticed that it occurs once the engine/tranny warms up. when i first start it up i have no problems. but after running it for 15 plus minutes or so. it will shift abruptly just going into fourth gear..? trying not to drive it if i dont need to at this time.

 

[cutch9977]

hmm i know ur never supposed to tow in overdrive correct?

 

[bgranger7]

Yeah..I suppose not. I only did so for a few miles, i figured it was okay since it was a light boat..however maybe I was wrong.
Think this is what caused it?

 

[cutch9977]

honestly im not the person to awnser that im not worth shit when it comes to trannys mines messed uo too haha

 

[sarstad]

see i have a bid of the same prob mine slibs between 2 and 3

 

[Viper Command]

5r55e?
Do your reverse lights work?

when ever I hook up a trailer it pops my fuse, and this fuse also controls the OD solenoid.

I dont rember the location but its a 10 amp fuse.