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#1
11-17-2004, 06:27 AM
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Installed new tranny mount, notice a lot of shaking now....
Ok, the stock tranny mound was literally ripping off(it was hanging by one bolt LOL), so I tossed it and installed one of those polyurethane mounts from www.prothane.com.
I don't know if anybody's used these, but I notice my car really starts to vibrate after the rpms go over 2000rpm, it will not do it at lower rpm's either. I know I installed the mount properly (anyone who's done one should know it's pretty simple) and I know that a polyurethane mount will not absorb vibrations as well, but what I feel is VERY pronouced, expecially at 2500rpm (feels like I'm hitting warp drive LOL!) Is this normal? I can't think of another reason why this would happen. 
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#2
11-17-2004, 04:40 PM
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Re: Installed new tranny mount, notice a lot of shaking now....
polyurethane is a lot stiffer than rubber, so it holds horsepower better by not allowing it to bleed away. however, the stiffness doesn't allow it to absorb as much vibration as stock rubber, so it's only natural. the only other thing i can think of is that the trans mount got the tranny up so high that's it's rubbing on the floor pan.
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-Andy '89 Mustang 5.0 - How fast? i'll know this weekend. '86 Mustang LX - Shortblock is built, now for the rest of it. "Put the subject before the verb, hmm? Fail this class, you will." -Yoda teaches english class.
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#3
11-17-2004, 08:19 PM
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IF you know its installed right, bolts tightened down well, and its the correct mount, then its not the mount. Did you remove your drive shaft when you did the mount? If so, did you mark it and reinstall it the same way?
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92 Mustang GT, 347 Stroker(Forged Steel Crank/Rods-Balanced, Forged Alum Dished Pistons), B50 Block, Track Heat Intake, Twisted Wedge Heads w/ Stage 3 port/polish, 80mm C&L MAF, FMS 30# Inj., BBK AFPR, Trick Flow Stage 2 Cam, Trick Flow 1.6R Rockers, BBK EL-CC Headers, MAC O.R. H-Pipe, Flowmaster Cat-Back, Accufab 75mm TB, MAC CAI, BBK Pulleys, Griffin Alum Radiator, Mark 8 Fan, MSD Pro-Billet Distributor; AOD, Dynamic 3300 L-U Converter, B&M Trans Cooler; 3:73 gears.
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#4
11-19-2004, 04:55 AM
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Re: Installed new tranny mount, notice a lot of shaking now....
Quote:
Anyway, I'll tell you guys in detail what's happening: Car feels normal at Startup, but I am getting a lot more Tranny noise (It goes away when I press the clutch pedal in). I'm assuming the mount is transferring the noise easier into the chassis. I don't have to be riding it, I can leave it in neutral and it will do the same thing. Let's say I leave it in Neutral (I have T5 Manual tranny). I start revving up the engine, and no major vibration until I get to 2000rpm, them it starts vibrating harder and vibration strenght peaks at 2400rpm (at which point it's enough to make CD's start skipping), then after it goes higher than 3000rpm the vibration will start to drop off and get weaker (enough to let CD's play normally again) the higher it goes. Anyway, the *exact* same thing will happen whether I have the clutch pedal pressed in or out, So I can't see the Driveshaft being the problem. Personally I think it's just the stiffness of the mount, I was expecting it, but not to this degree. (I have noticed that vibration has been reduced after the first couple of days riding it, maybe it's breaking in?)
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95 GT AKA "The Purple Hippo". Stock 302 bottom end. Edelbrock Heads. Performer 5.0 Intake, 1.7 RR's on stock Cam, Stock T5, 3.27 gears, UD Pullies, K&N Filter, rubber boot deleted, A/C deleted, BBK Catted X-Pipe, 180º TStat, EEC Tuner running J4J1 stock BIN. AEM WB02, Minor tunes, running pig rich. No clue as to RWHP feels a tad faster than a stock 05 GT.
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