Slams into gear when putting into reverse (97 Mark VIII) - TCCoA Forums
 
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post #1 of 9 (permalink) Old 06-11-2011, 03:10 PM Thread Starter
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Slams into gear when putting into reverse (97 Mark VIII)

Hey all,

I just bought this car about a month ago. It has 104k on it and when putting it into reverse, it basically just slams into gear. It's not as bad when putting into Drive.

Any ideas? I've also noticed when going into 3rd, it feels pretty firm compared to 1-2nd shifts. Does reverse and 3rd have a connection with an accum. spring?

Jason
- '97 Mark VIII LSC 'Dark Navy Blue'
- '94 Thunderbird LX 4.6
Previously...
- '98 Cobra
- '95 Thunderbird LX 4.6
- '95 Buick Roadmaster LT1 wagon
- '95 Mustang GT
- '95 Mustang GT-S
- '89 Mustang LX 5.0 notch
- '92 Chevy Cavalier Z24
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post #2 of 9 (permalink) Old 06-13-2011, 12:42 PM
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Question (97 Mark VIII)

Idle speed is ________?

What Piston & Springs are in 1-2 Accumulator_____?

Do you know if someone JMOD'd this yet_____?

GET OFF MY LAWN~! ... & Let's not forget guys... There's still a dead Imaginary Ex-Girlfriend out there...

Last edited by BUCK; 06-13-2011 at 12:52 PM.
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post #3 of 9 (permalink) Old 06-15-2011, 08:21 PM Thread Starter
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Quote:
Originally Posted by BUCK View Post
Idle speed is __around 800RPM______?

What Piston & Springs are in 1-2 Accumulator__Feels all factory___?

Do you know if someone JMOD'd this yet___Feels like the factory sloppy 1-2 shift. Ironically, 2 - 3 seems to be a lot firmer. __?

As far as I'm concerned, this car is completely stock down to the bone.

Jason
- '97 Mark VIII LSC 'Dark Navy Blue'
- '94 Thunderbird LX 4.6
Previously...
- '98 Cobra
- '95 Thunderbird LX 4.6
- '95 Buick Roadmaster LT1 wagon
- '95 Mustang GT
- '95 Mustang GT-S
- '89 Mustang LX 5.0 notch
- '92 Chevy Cavalier Z24
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post #4 of 9 (permalink) Old 06-15-2011, 10:21 PM
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More than likely a broken 1-2 accumulator piston spring. Mine was broken and my 1-2 shifts were very harsh and reverse engaged pretty firm too.

Michael M. ASE P2 Automobile Parts Specialist.

1996 Thunderbird LX. Gone, but not forgotten Oct 1995-March 24 2016 Trick Flow headded, E85 guzzling beast.

1985 Mustang GT. modified stock Holley 4180C, Weiand Street Warrior intake manifold, equal length headers, true dual exhaust, 5 speed, 3.55:1 8.8'' rear end, Ford Racing 10.5" clutch.

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post #5 of 9 (permalink) Old 06-16-2011, 05:58 PM Thread Starter
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It doesn't make sense though because my 1-2 shifts are sloppy/soft.

Jason
- '97 Mark VIII LSC 'Dark Navy Blue'
- '94 Thunderbird LX 4.6
Previously...
- '98 Cobra
- '95 Thunderbird LX 4.6
- '95 Buick Roadmaster LT1 wagon
- '95 Mustang GT
- '95 Mustang GT-S
- '89 Mustang LX 5.0 notch
- '92 Chevy Cavalier Z24
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post #6 of 9 (permalink) Old 06-16-2011, 09:08 PM
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Service It.

Best thing to do is pull the pan and inspect what you have. Check out the fluid, filter, pan, accumulator pistons & springs, and basically look it over.

That's where I would start anyways.....

~Rick

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post #7 of 9 (permalink) Old 06-17-2011, 12:12 AM
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Lightbulb

Verify with DD or Darrin but as far as "an idea" which is what the OP asked for:

at 1 AM I'm vaguely remembering MAYBE a Drum or Planetary bushing that commonly scores that would explain the slam into Reverse AND the firm into 3rd.

Funny because in the JMOD has a remedy for the SLOWNESS of engaging Reverse that obviously opens the Port to Reverse Servo but most of us thunk it into Reverse before Motor ever comes off Fast Idle so needless to say I opted to leave that Port alone on my JMOD.

The mushy 1-2 is OEM 97 4R70W for sure.

GET OFF MY LAWN~! ... & Let's not forget guys... There's still a dead Imaginary Ex-Girlfriend out there...

Last edited by BUCK; 06-17-2011 at 12:44 AM.
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post #8 of 9 (permalink) Old 12-11-2011, 09:03 PM Thread Starter
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So a little update. As the weather has gotten cooler, I've noticed that when the car is cold in the mornings (60~ degrees out), reverse engages softly (not sloppy).

When hot, it slams into reverse.

Does the trans fluid being used have anything to do with this behavior? I don't know what's in it and I am guilty of not changing it yet since I bought the car.

BTW, idle speed is at normal, & nothing else seems abnormal during driving.

Jason
- '97 Mark VIII LSC 'Dark Navy Blue'
- '94 Thunderbird LX 4.6
Previously...
- '98 Cobra
- '95 Thunderbird LX 4.6
- '95 Buick Roadmaster LT1 wagon
- '95 Mustang GT
- '95 Mustang GT-S
- '89 Mustang LX 5.0 notch
- '92 Chevy Cavalier Z24
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post #9 of 9 (permalink) Old 12-11-2011, 09:50 PM
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http://forums.tccoa.com/showpost.php...22&postcount=6

Change fluid, use Mercon V.

~Rick

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