knocking under load....
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Joined: Jun 2007
Posts: 10,008
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From: Austin, TX
i don't think it's a main, but i guess it could be. i would guess a main would continue to knock even when i downshift to 4th and its running 2500rpms and decelerating.
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Postmaster
Joined: Feb 2004
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From: Levittown
I have had springs rattle/bang around in the dampers.
Also even had 1 spring fly out and jamb the clutch.
I dont believe motor. It would be rpm related (more/less with rpm)
Iam at clutch and trans as of now.
I just have not got a grasp on what strokin states.
He states Knock, and gets louder with speed and load.
Might be a bad choice of words to describe the issue for me.
Bill
Also even had 1 spring fly out and jamb the clutch.
I dont believe motor. It would be rpm related (more/less with rpm)
Iam at clutch and trans as of now.
I just have not got a grasp on what strokin states.
He states Knock, and gets louder with speed and load.
Might be a bad choice of words to describe the issue for me.
Bill
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Joined: Jun 2007
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From: Austin, TX
ok i will try to change the way i say it. when your driving in 2nd and 3rd gear it's not bad, you can barely hear the sound at all if u hear it at all. 4th gear is where it gets to the point where you can hear it pretty good and only does in while under load. at this point if you get into it hard the noise will get louder and faster in the upper RPMs. if you get it up to a certain engine speed and hold it there lets say 2300rpms, where i'd normally shift, hold it at 2300 rpms for a second then push in the clutch, but keep the engine at the same 2300rpm. the sound goes down a little bit then when you shift it to neutral with the engine still at 2300rpm the sound completely goes away. get it into 5th gear and it will do it as well. cruising at 70mph you can hear it a little bit, clack.... clack.... clack.... get into it a little to pass a car and the sound speeds up and gets louder until you let off then it stops and get back to cruising speed and hold it there and it sounds exactly the same as before.
Also, if you speed up very slowly it won't do it near as bad as when your hard on it. if your going WOT it's quite loud, if your being easy just normal driving then it's not near as bad.
Also, if you speed up very slowly it won't do it near as bad as when your hard on it. if your going WOT it's quite loud, if your being easy just normal driving then it's not near as bad.
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Joined: Oct 2004
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sounds like a loose nut............behind the.......steering wheel LOL. seriously tho I'm kinda thinkin maybe those DMF clutch springs. Does it rattle like hell when you shut the motor off Travis?
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Joined: Jun 2007
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From: Austin, TX
The tranny does make a ton of racket when i shut the engine down though unless i push in the clutch when i shut it off. haha.Update for Bill, i checked EOT vs. Ambient temp this morning and it was good. on my drive into work the EOT got up 199*, but mostly stayed around 197*. did another CCT and got cylinders 1, 2, and 3 contribution/balance fault. ran the buzz test again and everything sounded good and got system pass.
IPR dc% stays around 12% cruising and peaks at 48% @ WOT so i guess the HPO system is doing well. haha.
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Joined: Jun 2007
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From: Austin, TX
so this means??? big $$$?? i am going to pick up another tranny today thats supposed to be in good shape for $300. probably going to take it by the tranny shop and have them check it out and probably go ahead and rebuild the whole thing b/c my truck has 304k miles now with the original, nonrebuilt, ZF5 in it. it might be nice to have a new trans in it.
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Joined: Jan 2004
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From: Kearney, Nebr
So.. Say you have a decent fuel leak and your engine knocks a little bit harder under load especially if you hammer on it. Is this an easy indication that your getting low pressure or possibly air in the lines?
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Joined: Jun 2007
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From: Austin, TX
On a side note, i bought an extra transmission on Saturday and took it up to the tranny shop today. considering getting the shafts and gears cryo'd at 300 below while he has it taken apart. anyone think the syncros or shift forks or anything else would benifit from cryo treating?