tranny acting up, bad TC?

[freeride707]

So ever since i got my truck it made this rattling noise at idle that came frome the bellhousing and it sounds like it full of rocks or bolts. i pulled the inspection plate off and everything looked fine so i kept driving it,

well recently its starting to shift strange. it will shift fro 1st to 2nd perfectly then immediately shift to 3rd so the truck bogs down(only with OD on) once you get the rpms back up and keep picking up speed it wont shift into 4th until you let out of the throttle then the truck slows down to the point where it downshifts back into 3rd. it does this with or w/o OD.

the fluid looks fine and was recently changed. and i believe it has stock gears (diff. plate says 3.73) it cruises at 65 at around 1800rpms

is this tranny goin out or is the TC causing this to shift strange? is there anything i can do to keep it alive for a couple more months until i can afford a built tranny
heres a vid of the TC noise

[Cory S]

99's had TC problems i am sure thats what you are having a prob with i have a FTI tq converter triple disk and i like it better than my suncoast TQ converter i had

[freeride707]

thats what ive heard and i do have an early 99, but will the TC cause it to act up when shifting like this?

someday i will get a billet TC.

[freeride707]

so today i drove it w/o overdrive until i got to cruising speed then switched OD on so it would shift right, and now tonight i was idling in the driveway in park and the OD light started flashing,
whats this it my tranny going out? help i need to drive about 100mi tomorow and i dont want to screw up the tranny anymore

[greasltn]

The OD light flashing means you have a tranny code. Scan for codes and you could find out what's going on.

[freeride707]

Originally Posted by greasltn

The OD light flashing means you have a tranny code. Scan for codes and you could find out what's going on.

can any scantool be used? or is it need to be a special tranny scanner

[greasltn]

Any scanner that works with your truck will work. I use the snap on brick.

[freeride707]

well today the OD light didnt flash at all and shifted fine i drove a little over hundred miles and didnt have any problems

will be replacing the TC with an upgraded one for sure tho hopefully it solves this weird shifting