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Old 06-23-2013, 01:10 PM   #1
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Mustang vibration

I have a 2000 gt, it has a 96 short block and pi heads and cams, intake. it was automatic, i made it standard but it is a 6 bolt crankshaft, and i put a 11" clutch and a tr-3650 tranny. when you start it is ok but when you accelerate it stars a very strong vibration, i think is the flywheel, it has steeda under drive pulleys. what you guys think it is???????
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Old 06-23-2013, 04:04 PM   #2
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I have a 2000 gt, it has a 96 short block and pi heads and cams, intake. it was automatic, i made it standard but it is a 6 bolt crankshaft, and i put a 11" clutch and a tr-3650 tranny. when you start it is ok but when you accelerate it stars a very strong vibration, i think is the flywheel, it has steeda under drive pulleys. what you guys think it is???????
Could be the tranny mount. It might just be holding the tranny up but not holding it down.. Causing it to bounce around.. Do you feel it in the shifter?
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Old 06-23-2013, 04:26 PM   #3
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Yes!! But everything is tight. Is a very strong vibration, i also have prothane engine mounts. Can it be that the flywheel is from a 6 cyl??
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Old 06-23-2013, 04:31 PM   #4
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Yes!! But everything is tight. Is a very strong vibration, i also have prothane engine mounts. Can it be that the flywheel is from a 6 cyl??
I would lift the car and if you can push the tranny up it is probably the mount. the bolts could be tight, but the mount is a two piece designed to hold the tranny from bouncing up and is to keep it up in position. so it does no matter if the bolts are tight or not it can still be the mount. it happened to mine i got a new one for like 50 bucks at advance auto store.
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Old 06-23-2013, 04:32 PM   #5
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It's even vibrating on N if you accelerate.
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Old 06-23-2013, 05:02 PM   #6
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Is a prothane mount

---------- Post added at 10:02 PM ---------- Previous post was at 10:02 PM ----------

Can it be the pilot bearing
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Old 06-23-2013, 09:39 PM   #7
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Where did you get the flywheel Charlie? Your suspicions may be correct. I hate to tell you this, but if you're unsure of the origin of that flywheel, you're going to have to find a part number on it to determine what it came off of. You know what that means...
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Old 06-24-2013, 02:16 AM   #8
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Sure do. Thanks!!
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Old 06-24-2013, 10:34 AM   #9
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Are the 6 cyl 0 balance too??
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Old 06-25-2013, 01:30 AM   #10
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Put it in neutral and rev it. If it still vibrates its something in the motor, if not its in the clutch/trans/back from that. Narrow it down and go from there.
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Old 06-25-2013, 03:32 AM   #11
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It vibrates in neutral and it vibrates, peaple told me that is the flywheel if vibrates in neutral.
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Old 06-25-2013, 09:56 PM   #12
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Also could be your harmonic balancer.
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Old 06-25-2013, 11:29 PM   #13
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But its almost new, i only used for like 1,000 miles then took it off.
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Old 06-26-2013, 01:49 AM   #14
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You took off your balancer? I sure as hell hope not.
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Old 06-26-2013, 01:51 AM   #15
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What about your fan ?
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Old 06-26-2013, 01:52 AM   #16
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What about your fan ?
An electric fan is not going to make the car shake.
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Old 06-26-2013, 01:56 AM   #17
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Ha oops didnt know it was electric what about a vacume leak? I had a hose pop off and made my car run ruff and make my car vibrate
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Old 06-26-2013, 03:24 PM   #18
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It stalls great is when i accelerate the car. I taking the tranny down f... It lol.
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Old 06-26-2013, 04:36 PM   #19
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Not a vacume

---------- Post added at 09:36 PM ---------- Previous post was at 09:35 PM ----------

I think is a v6 flywheel
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Old 06-26-2013, 09:04 PM   #20
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Is a 96 engine, do you guys think it needs balance.
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Old 06-27-2013, 12:43 AM   #21
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Is a 96 engine, do you guys think it needs balance.
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Old 06-27-2013, 12:47 AM   #22
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Can you be more specific about what is going on here Charlie? Did this vibration start right after you coverted to a manual?
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Old 06-27-2013, 08:56 AM   #23
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No, i had an engone fail, i took a 96 cougar engone NPI, and put a PI swap on it and on to the car. The cougar was auto. Then i whent to my friend mashine shop and he had the 6 bolt flywheel i needed. But i never cheked if it was for a v6 or v8. I know it was a bat step to take without cheking first.
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Old 07-02-2013, 09:29 AM   #24
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Any help?
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Old 07-02-2013, 04:28 PM   #25
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Any help?
Ok. I did a little search of the threads for you Charlie. The best that I came up with is that the non-pi rotating assemblyis internally balanced and the pi rotating assembly is externally balanced. What this means is, the two different rotating assembly's have different flywheels and , probably different harmonic balancers. You need both from a non-pi rotating assembly. I got that info from a two year old thread and it was someone who apparently doesn't post regularly anymore so I am unsure about this. Perhaps some of the other guys can confirm if this could possibly be your problem.
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Old 07-03-2013, 08:46 AM   #26
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I took down the tranny the flywheel is from a v6 thats the problem. Thanks guys.
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