Just fitted the Tremec TKO and I have "a noise" I'm not happy with....after 3 weeks, 1000km.
Sort of a ringing more than a rattling noise, with a slight vibration that increases with speed. Coming from rear/extension housing area.
Happens in 3rd, 4th, 5th etc so it seems common to the output shaft area, more of a kph thing, not rpm. Slightly there at cruise power, but under acceleration increases markedly over 100kph.
1. Main output shaft bearing (I'm told HIGHLY unlikely for new box).
2. Could a minor out of balance driveshaft cause the gearbox to make a noise? Doesn't feel like driveshaft vibe?
3. Someone mentioned a bushing that the tailsshaft yoke slides thru, but I can't see this in the diagrams.
I checked bellhousing runout before fitting the box and all measured within limits. Bought it 2 yrs ago so no warranty.
Any ideas much appreciated. Bring back my toploader!!