Archived 2nd gear stumble

[Aliff]

transmission wont shift into 3rd unless i let off the throttle

the engine wont even go past 2000rpm until i lift my foot to let it shift





this is an emergency,i have to tow a trailer to fl from wv for my job







thank you in advance

 

[mfburns]

What type transmission? What year? Any upgrades, mods, etc.