7.3IDIDSL
Full Access Member
Well guys i swapped out the original DMF for a Southbend SMF this weekend. And after hearing horror stories of severe cases of gear rattle i was prepared for the worst the whole time i was installing the clutch.
Well good thing i was preparing for the worst because the worst happened. I started the truck and went to let the clutch out and i heard the worst sound in the world. Its a very loud vibration noise that goes almost completely away when i push the clutch back in. As long as im sitting with my foot on the clutch the truck doesnt sound all that bad...but as soon as i let the clutch out in gear or neutral i get that loud vibration sound back.
I got a mechanic friend of mine to listen to the sound and he says he doesnt think it has anyting to do with the clutch and he got me to go under the truck and listen and feel for the sound while he let the clutch out in neutral and the sound is definately coming from the tranny and if i put my hands on the side of the tranny i can feel a vibration. He says it sounds like gear rattle but he has done 5 of these swaps on these trucks and has never once heard a sound like that.
Also if im driving the truck and let the rpms drop down to about 1200 rpm the sound comes back. At this point im completely lost and have no idea what to do. My buddy suggested i call southbend and tell them whats going on as well as take my truck to a local tranny shop and see what they say about the sound. He also says it might be worth it to go out and buy some gear oil and drain the atf in the tranny and refill with gear oil and see what happens. I really need some help here i dont know what to do haha i would feel better if i knew forsure that it was gear rattle and not my brand new clutch dieing.
Well good thing i was preparing for the worst because the worst happened. I started the truck and went to let the clutch out and i heard the worst sound in the world. Its a very loud vibration noise that goes almost completely away when i push the clutch back in. As long as im sitting with my foot on the clutch the truck doesnt sound all that bad...but as soon as i let the clutch out in gear or neutral i get that loud vibration sound back.
I got a mechanic friend of mine to listen to the sound and he says he doesnt think it has anyting to do with the clutch and he got me to go under the truck and listen and feel for the sound while he let the clutch out in neutral and the sound is definately coming from the tranny and if i put my hands on the side of the tranny i can feel a vibration. He says it sounds like gear rattle but he has done 5 of these swaps on these trucks and has never once heard a sound like that.
Also if im driving the truck and let the rpms drop down to about 1200 rpm the sound comes back. At this point im completely lost and have no idea what to do. My buddy suggested i call southbend and tell them whats going on as well as take my truck to a local tranny shop and see what they say about the sound. He also says it might be worth it to go out and buy some gear oil and drain the atf in the tranny and refill with gear oil and see what happens. I really need some help here i dont know what to do haha i would feel better if i knew forsure that it was gear rattle and not my brand new clutch dieing.