Has anyone ever ran into this problem?
Thread Starter
Teching In
Joined: May 2011
Posts: 12
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Has anyone ever ran into this problem? Recently I installed a Yank SS3600 stall and ran into a slight problem. Every now and then when the converter locks, then unlocks, and then locks again the converter starts to make a loud ratlling noise until you gain a little bit of speed over 40 which is my lockup speed. Sorry if I confused any of ya'll! Any explanations would be great!
Thanks, Colby
Thanks, Colby
Im not sure. I think it just has to do with the engine being at a different load and it angles the exhaust different making it rattle? Sorry I really dont know. I may try taking off my drive shaft loop and see if it does any different.
Teching In
Joined: Jan 2008
Posts: 33
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From: McKinney, TX
I just put in a SS3600 also and at 40mph with little throttle I get some nasty vibrations also. I figure it was because the Yank has a better lockup clutch and the rpms are just right to create the vibrations, speeding up just a little gets rid of it. I also have a performabuilt transmission which gets rid of the partial lockup of the factory converter, not sure if that may add to the vibrations. I have HP Tuners and I'm guessing raising the mph where the converter locks would help a little bit.
Thread Starter
Teching In
Joined: May 2011
Posts: 12
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I think that could be the problem, when I put my headers on and ship the pcm off to get re-tuned I'll make sure to tell him to bump up the lockup speed. Keep me posted on what happens when you bump up you lockup speed. Thanks for chiming in!
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FWIW when the tuner and I were driving on the street to street tune...I asked him about the vibrations and he said it was the exhaust. I didnt discuss anything further with him. So thats just what I assumed it was and added that the different rpms at that speed must angle the exhaust differently. Just an idea you know? Its been like this for 1 year. If im driving behind some slow *** and they just happen to be at 36-43mph then I just throw it in regular drive so it dosent rattle.
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