Car randomly shakes when up-shifting. - TCCoA Forums
 
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post #1 of 13 (permalink) Old 10-13-2012, 09:45 AM Thread Starter
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Exclamation Car randomly shakes when up-shifting.

I notice this a while ago but I didn't pay much attention until it started happening more frequently. I notice some rattling below me when the car tries to up-shift into third. Anyone know what's happening?

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post #2 of 13 (permalink) Old 10-13-2012, 12:40 PM
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Torque converter shutter? Which a lot of times can be cured with a fluid change with new Mercon V (don't forget to drain the torque converter).

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post #3 of 13 (permalink) Old 10-13-2012, 06:36 PM
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+1 Fluid change with Mercon V and I'd also highly recommend the J-mod with a mild or medium setting (depending on your preference).

If you're not doing much to the car and want to keep the shifts reasonably soft I'd recommend the mild setting.

If you need more info on the J-mod look around the site. There's a lot here on it.

RobertP sells predrilled ready to install plates with all the accessories (springs, accumulators, valve body gasket, new Trans filter) needed to complete the mod.

I'd also recommend upgrading the valve body while you're in there.

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post #4 of 13 (permalink) Old 10-13-2012, 10:54 PM Thread Starter
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Quote:
Originally Posted by Trunk Monkey View Post
+1 Fluid change with Mercon V and I'd also highly recommend the J-mod with a mild or medium setting (depending on your preference).

If you're not doing much to the car and want to keep the shifts reasonably soft I'd recommend the mild setting.

If you need more info on the J-mod look around the site. There's a lot here on it.

RobertP sells predrilled ready to install plates with all the accessories (springs, accumulators, valve body gasket, new Trans filter) needed to complete the mod.

I'd also recommend upgrading the valve body while you're in there.
I will have to wait until Christmas when I get out of school before I can start messing with my car.
I read a few threads on the J-mod and it seems like something I can do later.
As for plans, I might do a DOHC swap (assuming Rob hasn't sold his Mark VIII engine by next spring.) Suspension and brakes are on the list as well.
I would like to take this car into the ~14 second 1/4 mile range.
How quicker will J-mod help with shift times and 0-60?

Cars Owned
-1995 Ford Thunderbird LX 4.6 V8 (June 2010-June 2013)
-1999 Subaru Outback 2.5 H4 (January 2013-June 2013)
Passed it on to my little brother
-2000 Volvo S70 2.5 I5 (September 2013-Present)
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post #5 of 13 (permalink) Old 10-13-2012, 11:14 PM
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It will help your shift out tremendously. Probably won't make much of a difference in your 0-60 times. The best way to get that down is gears and TC stall.

Mods? Yea, I got mods ...
Air silencer delete, warp drive, dilithium crystals, flux capacitor, Slingshot Rubber band power adder, Moonshine & Gas, Leaf Blower Supercharger, Hamster Wheel & Hamster, Energizer Bunny generating 1.21 gigawatts, Mr. FusionŽ Home Energy Reactor, hover conversion and a sextant celestial navigation system (The original GPS)
Best 1/4: 1,320 nanoseconds @ 670,616,629.2 miles per hour

"There isn't that much difference anymore between spacecraft, aircraft and modern automobiles..." - Keith Henry, NASA's Langley Research Center
See a list of my real mods and pictures of my car HERE. The true performance of my car was made possible by the Carolinas Crew Chief, RobertP at Rob's Tire & Auto
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post #6 of 13 (permalink) Old 10-30-2012, 11:51 AM
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I had same problem...drained tc and tranny...switched from Mercon to Mercon V and the shudder stopped.

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post #7 of 13 (permalink) Old 11-04-2012, 05:19 PM Thread Starter
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I'm taking the bird to a nearby transmission shop on Tuesday to do the flush for me.
They will flush the fluid and add an addictive to it to reduce friction or something.
I'll take the bird out for little drive afterwards and hopefully the rattling will no longer exist.
They are charging 120 bucks for all that and they are reputable according to reviews on the internet.

Cars Owned
-1995 Ford Thunderbird LX 4.6 V8 (June 2010-June 2013)
-1999 Subaru Outback 2.5 H4 (January 2013-June 2013)
Passed it on to my little brother
-2000 Volvo S70 2.5 I5 (September 2013-Present)
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post #8 of 13 (permalink) Old 11-04-2012, 06:54 PM
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Make sure they are going to drain the TC too.

-Daniel

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post #9 of 13 (permalink) Old 11-04-2012, 07:34 PM Thread Starter
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Originally Posted by SuperThunderbirdLX View Post
Make sure they are going to drain the TC too.
I was told flushing is better because it pushes new fluid into the TC and tranny while pushing the old fluid out. Draining the fluid alone only drains most of it but there will still be some of the old stuff left inside the TC.

Cars Owned
-1995 Ford Thunderbird LX 4.6 V8 (June 2010-June 2013)
-1999 Subaru Outback 2.5 H4 (January 2013-June 2013)
Passed it on to my little brother
-2000 Volvo S70 2.5 I5 (September 2013-Present)
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post #10 of 13 (permalink) Old 11-04-2012, 07:38 PM
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Originally Posted by BoiledDogs View Post
I was told flushing is better because it pushes new fluid into the TC and tranny while pushing the old fluid out. Draining the fluid alone only drains most of it but there will still be some of the old stuff left inside the TC.
On cars without a drain plug in the torque converter, that is true, but our vehicles have a drain plug in the converter! You pull that plug and every single drop of fluid will come out of that converter guaranteed...

Just turn the converter until you see the plug through the access hole in the bottom of the bell housing:


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post #11 of 13 (permalink) Old 11-04-2012, 11:53 PM
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Quote:
Originally Posted by BoiledDogs View Post
I'm taking the bird to a nearby transmission shop on Tuesday to do the flush for me.
They will flush the fluid and add an addictive to it to reduce friction or something.
I'll take the bird out for little drive afterwards and hopefully the rattling will no longer exist.
They are charging 120 bucks for all that and they are reputable according to reviews on the internet.
Avoid the fluid conversion additive and buy a couple of cases of mercon v from ford (motorcraft brand) or autozone (castrol brand) and bring it with you instead. Use the extra to service your powersteering in your driveway with a bucket and a pair of pliers.

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post #12 of 13 (permalink) Old 11-05-2012, 03:50 AM
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I notice this a while ago but I didn't pay much attention until it started happening more frequently. I notice some rattling below me when the car tries to up-shift into third. Anyone know what's happening?
If the 95 calibration is the same as the 96/97, then this is a result of the PCM slipping the torque converter clutch on the 2->3 upshift. If your fix does not include getting rid of this, then the shudder will come back.

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post #13 of 13 (permalink) Old 11-06-2012, 03:04 PM Thread Starter
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Well I got the car flushed and they added a friction modifier as well.
I went ahead and drove about 50 miles today and the shaking or rattling is no longer there.
Now I got other stuff to worry about...

Cars Owned
-1995 Ford Thunderbird LX 4.6 V8 (June 2010-June 2013)
-1999 Subaru Outback 2.5 H4 (January 2013-June 2013)
Passed it on to my little brother
-2000 Volvo S70 2.5 I5 (September 2013-Present)
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