after fitting my box there seems to be a knocking, its not when i change gear but when i accelerate, or brake (basically when theres sharp movement)could there be a loose fixing as it seems to hit the underside of the car???

all help appreciated

 

Just make sure alls tight.Did you re fit the upper gearbox to bulkhead mount?

 

pretty sure of this matey, iv heard that t could be driveshafts or the prop??? also could be slight size of gearbox size ? could any of this ring true?

 

mine did this , it was one of the crossmember bolts

 

i had this when i put my box on, after say a week id go over all the bolts to ma
make shure nothings worked loose, but your best bet is the gearbox to chassis mount.