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Old 04-08-2012, 07:55 PM   #1
Gold Saturn
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Default TAM responsible for shifting smoothness w/ manual?

To elaborate on the title, could a failing top mount cause clunky shifts? I've found that if I don't feather each gear in perfectly I get a jerky shift, obviously less noticeable from 3rd to 4th and 4th to 5th, but 1st to 2nd and 2nd to 3rd are usually pretty clunky. Understandably I've not been driving standard for long, and I'm sure I could use some work overall, but I've found that on a really cold morning for the first few minutes my shifts seem pretty smooth, but as the engine bay temps heat up it seems like they get clunkier and clunkier as I'm assuming the rubber mounts become more pliable due to the heat.

I'm replacing my top and transmission mounts with OEM, new studs and nuts as well, just to save OldNuc the trouble of posting those p/ns as has been done many a time.

My top mount is sagged significantly, but I don't really notice any severe vibration....I can definitely rock the motor a little bit with my hands, and it seems a majority of the play is with the top mount. If this doesn't solve the issue I'll move on to some poly inserts to refurb my dogbones, because I'm not ordering 2 new ones and J/Ys are few and far between in my area.

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Old 04-08-2012, 08:00 PM   #2
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Default Re: TAM responsible for shifting smoothness w/ manual?

I'd bet my frowny mount has lasted longer then just about anyone else's and it's still more solid then OEM. The only mount I have that doesn't have poly insert's is the transmission mount and if I could find a die to fix the thread's on the new one I have the jerk/thud on shifting would go away. I suppose it's time to retire the old frowny but I'm not quite sure I can get the insert into the new one properly.

An easy thing to check is to make sure the transmission mount nut hasn't come loose, that can cause clunking when shifting as well but I wouldn't think it'd be temperature dependent.

...
The proper way to fix a S-Series automatic is to replace it with a 5spd O:)

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Old 04-08-2012, 08:01 PM   #3
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Default Re: TAM responsible for shifting smoothness w/ manual?

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Originally Posted by fetchitfido View Post
I'd bet my frowny mount has lasted longer then just about anyone else's and it's still more solid then OEM. The only mount I have that doesn't have poly insert's is the transmission mount and if I could find a die to fix the thread's on the new one I have the jerk/thud on shifting would go away. I suppose it's time to retire the old frowny but I'm not quite sure I can get the insert into the new one properly.

An easy thing to check is to make sure the transmission mount nut hasn't come loose, that can cause clunking when shifting as well but I wouldn't think it'd be temperature dependent.
Thanks I'll check that out when I replace it. When I did the manual swap with my car I purchased a cheap trans mount off of Rock Auto, I'm sure the trans mount isn't as integral as the top mount as far as quality goes, but I ordered an OEM just because I've always gotten good results with OEM stuff (as you should)

I didn't replace the top mount originally because I didn't really know what to look for, I had assumed it was fine since it was dealer replaced a year or 2 prior, but I'd imagine all of the reverse slams and hard shifts from the automatic took quite a toll on it during that time frame.

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Old 04-08-2012, 08:04 PM   #4
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Default Re: TAM responsible for shifting smoothness w/ manual?

The bang I was hearing every time I released my clutch told me it was new TAM time, besides failing the pen test. My car wasn't vibrating much either. New mount - no noise on shifts.

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Old 04-10-2012, 07:19 PM   #5
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Default Re: TAM responsible for shifting smoothness w/ manual?

Quote:
Originally Posted by BV22 View Post
The bang I was hearing every time I released my clutch told me it was new TAM time, besides failing the pen test. My car wasn't vibrating much either. New mount - no noise on shifts.
Sweet, hoping this will solve my issue. New mount will be here tomorrow

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