Help weird nose backing up????

Hey everybody quick question. I have the 03 pictured 4cyl 5spd 2.7. I changed out the stock 16's for 15x8 w/31x 10.50's on them. I just turned 100000 miles and the other day I was backing down my street foot off the clutch and foot off the gas pedal and the best way I can describe it was I heard a thwacking sound. It was still in gear just coasting backwards.I can turn the truck off put it in 1st or reverse and get very very minimal play trying to move the drive shaft. In neutral it will move(rotate)maybe a 1/4inch. The clutch feels strong I bought it with 80000 miles on it from a one owner but don't know how he drove it. I know it has never been wheeled it's just spotless underneath and under the hood. I got all the maintenance records from his dealer and nothing but normal services. Do you think the tires could have contributed to this? I've ran the exact same tire and size on at least 5 other yotas. It is diffently coming from the drive train any suggestions would be greatly appreciated!!!

 

New tires eh? I think you have to check really carefully to rule out some form of tire rubbing before you look for anything else.

 

Thanks I'll do it and keep you posted.

 

Nothing rubbing not even close. My buddy has the same truck but an 02 model laid beside it and we looked every where with no tire rubbing. Could it be tge throw out bearing going bad????

 

wrong topic window for my issue mine is automatic, sorry

 

if its a metalic "clunk" sound it is probably the brake cover shifting a tiny bit. very normal as most users experience this. Both my 07 and 10 taco did it when going from reverse to forward.

 

Likely the thwacking modulator is worn.