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post #1 of 18 (permalink) Old 10-04-2013, 06:59 PM Thread Starter
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trans leak while parked

Well my 96 a/c compressor went out this spring and she has not been driven much this summer. Robert P. j-modded the tranny 2 year ago and it works great. Never leaked until today, I looked under it, and there is a big spot of tranny fluid under the passenger side.
Now I have another 96 I have had for five years as a parts car that does the same thing. Does anyone know where this might be coming from? Is this from it sitting up?

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post #2 of 18 (permalink) Old 10-04-2013, 07:17 PM
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Dip stick tube o-ring.

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post #3 of 18 (permalink) Old 10-04-2013, 08:54 PM
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Or the manual lever shaft, the rear seal, the tailhousing gasket, the pan gasket, the cooler lines, the front pump seal, or the torque converter.

One of those, anyway.

Unless you have a porous tranny casting... That just sounds nasty.


Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
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post #4 of 18 (permalink) Old 10-04-2013, 09:07 PM Thread Starter
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Yeah well unless i'm there to see it drip I guess i'll never know. I've looked at all these usual suspects but no obvious culprit.

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post #5 of 18 (permalink) Old 04-10-2014, 12:38 AM
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I think my dipstick tube is leaking too. My pan is wet after driving and I'm getting some trans fluid on the front of my 3rd cat. While I'm in there, should I do the pan seal too? Tail shaft looks fine, as far as I can tell. It seems to only get wet once the fluid is up to full operating temp. I can smell the fluid from outside of the car when it's hot too.

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post #6 of 18 (permalink) Old 04-10-2014, 07:12 AM
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Quote:
Originally Posted by Mgino96tbird46 View Post
I think my dipstick tube is leaking too. My pan is wet after driving and I'm getting some trans fluid on the front of my 3rd cat. While I'm in there, should I do the pan seal too? Tail shaft looks fine, as far as I can tell. It seems to only get wet once the fluid is up to full operating temp. I can smell the fluid from outside of the car when it's hot too.
Check your fluid level..Your transmission could be overfilled..

When there's too much fluid in there it starts foaming when hot, and will run out of places..Making it look like a fluid leak..

If you change the pan gasket..Use the rubber bonded piece with the metal core..That one's reusable..


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post #7 of 18 (permalink) Old 04-10-2014, 08:20 AM
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Quote:
Originally Posted by Mgino96tbird46 View Post
I think my dipstick tube is leaking too. My pan is wet after driving and I'm getting some trans fluid on the front of my 3rd cat. While I'm in there, should I do the pan seal too? Tail shaft looks fine, as far as I can tell. It seems to only get wet once the fluid is up to full operating temp. I can smell the fluid from outside of the car when it's hot too.
That's a common leak. Rob had to replace my DS tube gasket once too.

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post #8 of 18 (permalink) Old 04-10-2014, 11:59 AM
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I have a leak too, since I got the car a little over a year ago. I narrowed it down to what I thought would be a pan gasket seeping. Changed that and still had a good leak especially on inclines nose up. Then I seen fluid coming from the tail shaft seal, changed that ( it's rough with exhaust connected lol) still to leak. Come to find out it's leaking from the yoke. I even called Alan at dd and he said it happens and to just silicone it. A year later still haven't got yo it.

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post #9 of 18 (permalink) Old 04-10-2014, 01:43 PM
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I jacked the car up and looked at it more. Looks like the dipstick tube isn't leaking, but the tail shaft housing gasket is. Tail shaft section needs to come off. The second pic is after I sprayed some brake parts cleaner. I felt all around the dipstick tube to check, it was gritty, but dry.








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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.

1998 Mustang GT premium. Trans Go shift kit, Bassani catted x-pipe, PI heads, cams, intake swap, Accufab elbow, SCT Xcal 4 tune, Eibach Pro-kit, Maximum Motorsports Caster/camber plates, fat tires. Banging audio system.

Last edited by Mgino96tbird46; 04-10-2014 at 01:55 PM.
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post #10 of 18 (permalink) Old 04-10-2014, 02:59 PM
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Michael check the tightness of the extension housing bolts, I noticed the housing is missing it's vibration dampener and have seen these self loosen many times before. It's worth checking.

-1996 Pearl White Thunderbird 4.6 Sport 4v with many mods:
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post #11 of 18 (permalink) Old 04-10-2014, 04:29 PM
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Interesting. What is the torque spec for those bolts? 15-25 ft-lbs?

Also, when I do replace that gasket, other than taking out the vss, is there anything special I need to do or anything I need to look out for when removing and installing the tail shaft housing? Anything I need to align a certain way, etc.

I'll clean everything up and check the torque on the bolts first.

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.

1998 Mustang GT premium. Trans Go shift kit, Bassani catted x-pipe, PI heads, cams, intake swap, Accufab elbow, SCT Xcal 4 tune, Eibach Pro-kit, Maximum Motorsports Caster/camber plates, fat tires. Banging audio system.

Last edited by Mgino96tbird46; 04-10-2014 at 04:39 PM.
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post #12 of 18 (permalink) Old 04-10-2014, 07:16 PM
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My driveshaft was bad when that happened to me; if it's stock, take it alll the way out and look at it carefully.

I had a bad ujoint, and the ds was delaminated, front and back.

The one on Lazarus I replaced pro-actively had spun inside itself; I thought it was the tranny freaking out, lol.

I replaced both at the same time, not as funny.

I saw the ds later, after I was done, of course.

Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.


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post #13 of 18 (permalink) Old 04-10-2014, 07:56 PM
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Quote:
Originally Posted by Grog6 View Post
My driveshaft was bad when that happened to me; if it's stock, take it alll the way out and look at it carefully.

I had a bad ujoint, and the ds was delaminated, front and back.

The one on Lazarus I replaced pro-actively had spun inside itself; I thought it was the tranny freaking out, lol.

I replaced both at the same time, not as funny.

I saw the ds later, after I was done, of course.
Thankfully that's not a problem for me since I have one of the best drive shafts for these cars. lol

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.

1998 Mustang GT premium. Trans Go shift kit, Bassani catted x-pipe, PI heads, cams, intake swap, Accufab elbow, SCT Xcal 4 tune, Eibach Pro-kit, Maximum Motorsports Caster/camber plates, fat tires. Banging audio system.
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post #14 of 18 (permalink) Old 04-10-2014, 09:01 PM
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When replacing the Extension Housing Gasket..Use the updated gasket that has a silicon bead impregnated into it..The Ford piece is preferred..

Here's what it looks like:


Just to reiterate what I was saying earlier about foaming..Check your breather cap to see if it's dry, or has been leaking out of there..



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post #15 of 18 (permalink) Old 04-10-2014, 10:12 PM
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I shouldn't need any to lay any rtv, should I?

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.

1998 Mustang GT premium. Trans Go shift kit, Bassani catted x-pipe, PI heads, cams, intake swap, Accufab elbow, SCT Xcal 4 tune, Eibach Pro-kit, Maximum Motorsports Caster/camber plates, fat tires. Banging audio system.
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post #16 of 18 (permalink) Old 04-11-2014, 12:22 AM
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NO! RTV has no business near these transmissions. However you may choose to lock tight the fasteners to the extension housing... I'd recommend permatex/locktite blue for that.

-1996 Pearl White Thunderbird 4.6 Sport 4v with many mods:
Current Best: 13.583 @ 103.74 10/2014.
227hp/241tq measured on calibrated mustang dyno, tested at full vehicle simulation with inertia enabled, no number skewing.
-2001 White Ford F-250 Super Duty 6.8 V10, 4-door, 4x4, Limo Tint, BFG KO2's, Bilstein 7100 Remote Reservoir Race Bypass Shocks, 6" Spring lift, Kenwood Double Din, K&N Intake, FlowMaster Exhaust
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post #17 of 18 (permalink) Old 04-11-2014, 07:44 AM
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Quote:
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NO! RTV has no business near these transmissions. However you may choose to lock tight the fasteners to the extension housing... I'd recommend permatex/locktite blue for that.
Roger that. I'll get this knocked out later today when I get out of class.

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.

1998 Mustang GT premium. Trans Go shift kit, Bassani catted x-pipe, PI heads, cams, intake swap, Accufab elbow, SCT Xcal 4 tune, Eibach Pro-kit, Maximum Motorsports Caster/camber plates, fat tires. Banging audio system.
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post #18 of 18 (permalink) Old 04-11-2014, 06:51 PM
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Does anyone know how much fluid I'll lose when I unbolt the tail shaft housing?

The Ford gasket is just paper.

I never got around to doing it today since the auto hobby shop on base was too busy.

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.

1998 Mustang GT premium. Trans Go shift kit, Bassani catted x-pipe, PI heads, cams, intake swap, Accufab elbow, SCT Xcal 4 tune, Eibach Pro-kit, Maximum Motorsports Caster/camber plates, fat tires. Banging audio system.

Last edited by Mgino96tbird46; 04-12-2014 at 12:47 AM.
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