1999 ranger i hear a clunk only on take off feels like something is loose.. been doing it for a couple months now... any suggestions?

 

Welcome to the forum

2WD or 4x4, manual or auto?
Regular or extended cab(they use different drive shafts)?

U-joints on the drive shaft are the most common cause of "clunk" noise


But check motor mounts with simple test
Open the hood, so you can see engine from drivers seat
Start engine
With foot on the brake shift into drive
Watch engine
Give engine some gas with foot still on the brake, engine will lift up on one side a bit but just a bit
Try same thing in Reverse

If engine lifts too much and you also here "clunk" then you have a broken motor mount

If you have a manual trans then do the same test but with cold engine(high idle) and feather out clutch pedal while watching engine, other foot on the brake!
Use 1st and Reverse

 

My 202 was doing that and the transmission guy said he knew what it was there was a TSB out on it may yrs ago.. Took about an hour..not sure if its same issue or not.. Mine was the drive shaft..