One more strange noise to add to the list

[porkchop]

I am about 95% complete with my swapping project. I have been driving it around the nieghborhood and I can not figure out where this noise is coming from. It is a rattling noise like metal on metal. Riverbeast, GM Killer and my self thought that the fly wheel was bent but all that was wrong there was that that there was a loose bolt that I tightened it and now it is fine. If I am sitting in my driveway and reving the engine it sounds great, but once I back out and start to go forward the noise will start. It mainly does it while I am accelerating and as soon as I take my foot off the gas it will stop. I am once again puzzled. Could it be my flex plate? Please do not tell me that I need to pull the tranny out to fix this problem. I am so close to being done and do not want to go backward. TIA

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'67/'79 Wagoneer mix
Body of a 33 year old
Heart and legs of a 21 year old.
360,TH400,QT,D44's F&R
32X11.50's

"I regret that I have but only one paycheck to give to my Jeep."

[porkchop]

anyone?

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'67/'79 Wagoneer mix
Body of a 33 year old
Heart and legs of a 21 year old.
360,TH400,QT,D44's F&R
32X11.50's

"I regret that I have but only one paycheck to give to my Jeep."

[Veepster]

hhmmmm.....

can you remove the dust cover from the bottom of the bellhousing and inspect the flex plate? you should see shiny parts where it is rubbing(if it is rubbing)......flex plate was my first thought as I read the post.

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Peace.............BartG

78 Chero
360 2v, 400 QT with low
almost drivable:
4" skyjacker
33x12.50 BFG KO's
Thorley headers, 3" exhaust
Infiniti power leather seats

[porkchop]

The dust cover is not installed and the flex plate looks good to me. It is coming from that area. I find it strange that it would only do this while I am driving with my foot on the gas.

[Veepster]

I know I am stating the obvious but it is torque related....something is binding up in the driveline when it is under load....
how about putting it on jack stands, and then put in gear and gas it.....if it doesn't occur we definitely know it is torque/load related related!

I know your pain and frustation.



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Peace.............BartG

78 Chero
360 2v, 400 QT with low
almost drivable:
4" skyjacker
33x12.50 BFG KO's
Thorley headers, 3" exhaust
Infiniti power leather seats

[Brenton]

OK, having done these kinds of swaps in the past, and knowing that I am an intelligent individual, and knowing that you are an intelligent individual....

Did you tighten everything down. There isn't mebbe a loose motor mount bolt, or a partially tightened U-joint? Somthing that wasn't reattached that could bump against another part while the driveline is bound up under a load?

I still recall my chagrin with my first engine replacement, where I got everything put into place, turned it over and over and over, and it wouldn't start. Turns out that the fuel line wasn't reattached to the fuel pump from the tank side. Ironically this took me quite some time to figure out, since the dangling hose was butted right up against the fuel pump, so it LOOKED like it was attached properly. Once I corrected that, it turned right over and ran great from that day forward.

It really sounds like something minor was just overlooked. Mebbe a bracket that was supposed to go over something, that you rethreaded under...

Since it does appear to be torque related, is it possible that when the engine torques, it takes the exhaust pipe with it, just enough to bang on the tranny mount crossmember, or against the tranny? It really sounds like something along these lines to me. But then again... sheesh, why wouldn't it occur during revving.

These are just some thoughts... And good luck. It won't be long before I try to turn mine over upon project completion, and I'm gonna hit the roof of frustration in nano-seconds if something goes awry... So I know where your coming from.

Brenton

[porkchop]

Well I put it on jack stands and nothing. No sound, but it did have a weird clunk when I gave it gas, which I am sure is slop in the chain. I check the tightness on everything and it was good. Took it back out again and there was no noise but this time it started to smoke so drove home and there was a trail of tranny fluid down the street and into my driveway. When I stoped and looked under the wag it was VERY wet with tranny fluid. It looked to be coming from cooler lines, so I tightened those up and took it back out and the same thing happened. Brought it back this time and took off the vacum thing on the side (not sure of what it is called, lost my chiltons) and cleaned it and put it back on. No leak this time but the noise is back!!! I can not figure it out, it sounds like the torq converter bolts are hitting the flex plate, but there is no evidence of this. They are very tight and I even used lock tight on them.

I hate when you get on of those "it's there, it's gone" kinda noises when you are not doing anything to it. It is definately torq related though. I am calling all automatic tranny experts on this one. Please help, it is crunch time on this project, if I don't get it fixed I will have to get rid of it and get something else. TIA

------------------
'67/'79 Wagoneer mix
Body of a 33 year old
Heart and legs of a 21 year old.
360,TH400,QT,D44's F&R
32X11.50's

"I regret that I have but only one paycheck to give to my Jeep."

[BIGUGLY]

I had a similer problem that turned out to be the bolts thru the fly wheel into the converter were bottoming out. Every time i retorqued they were tight. It allowed just enough clearence to rattle. I discoverd side to side play, added 3 washers, problem solved. Drove me nuts for a while just thought you might want to check.

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79 Cherokee
BIGUGLY
360 Stroker/TH400/QT/44's
edelbrock performer pac
3"lift 33x12.5

[porkchop]

Happy days! I drove to work for the first time this morning with no problems to report. The sound ended up being that the new torq convert bolt heads were to big and were hitting on the flex plate. I put in new bolts and all is well. I still have not figured out where the leak was coming from. It still leaks a little but not enough to stress about. I still have to hook up the rear shocks, talk about a bouncy ride! I also need to hook up my reverse lights when I figure out the right wire http://www.cs.colostate.edu/~zeimet/ubb/biggrin.gif Thanks again to all that helped.

------------------
'67/'79 Wagoneer mix
Body of a 33 year old
Heart and legs of a 21 year old.
360,TH400,QT,D44's F&R
32X11.50's

"I regret that I have but only one paycheck to give to my Jeep."