Eaton Fuller 13 spd making noise

What series 13 is it ? 9-5-13's & 12-5-13's are known to be a little noisy. Most reman shops do not replace all the gears when doing a rebuild, just the ones showing wear, and many times running a new gear against an old one will sometimes cause such a noise.

 

Has your truck ever been towed or allowed to coast in neutral down long grades since this trans was installed?

 

alot of noise can be transmitted through the driveline right up through the gearshift making you think its a trans problem.

 

I have a 13 speed manual it’s like a grawling coming from the trans and starts vibrating in the floor borad and it only dose it when you let off of the gas or go to hit the gas what could it be

 

Even though I'm willing to bet we will never see this person again. Check your ride height!