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#2693225 - 04/07/13 08:13 PM Re: Gear oil change [Re: coolguy147]
stalag Offline
Over the Hill

Registered: 03/29/09
Posts: 2823
Loc: Columbus, OH
As long as it says on the tube of RTV that you used.
_________________________
Stalag;___________Just for Rizzo I am posting this in my sig. Coolants
2001 Lincoln Town Car Cartier L, 1997 Mercury Grand Marquis (extinct)
On my LTC the following mods/upgrades were added. Heinous motorsport control arms, Command Automotive SD-1 rotors, Calipers by Goldlinebrakes.com in silver with Hawk HPS pads, MSD COP's. MZT is also applied with programming from BOC. j-mod is now done. Final rebuild of transmission done by Gearstar.

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#2693250 - 04/07/13 08:48 PM Re: Gear oil change [Re: coolguy147]
theperfectdrugsk Offline
Member

Registered: 10/14/08
Posts: 179
Loc: Idaho
Yeah...depends on if you used the black, the red, the grey...or the quickset.

If you threw away the tube already...then just wait an hour or so.
_________________________
2007 CVPI, headlight relay upgrade. 94k and counting.

1999 CVPI, headlight relay upgrade, pioneer amp, 10" kicker subs. RIP at 206k frown

1991 Bronco Super Fancy Silver Edition. 98k miles.

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#2693260 - 04/07/13 09:02 PM Re: Gear oil change [Re: coolguy147]
coolguy147 Offline
Climber

Registered: 10/23/11
Posts: 813
Loc: Florida
1 hr dry. 24 hr cure. I ended up just putting it in. I think I waited 45 minutes. It was dark, and I needed to finish up the job. I'll check in the morning for any leaks. Blew out the vent on the rear axle too.

Man...I'm sore lol.
_________________________
1998 Mercury Grand Marquis LS
-Dual exhuast swap with muffler delete
-JMOD

12X,XXX

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#2693271 - 04/07/13 09:22 PM Re: Gear oil change [Re: coolguy147]
Loafy Offline
Member

Registered: 07/13/11
Posts: 118
Loc: Okanagan, British Columbia
Continuous Bead. RTV 1/8 inch thick


I've heard of jacks kicking out in the same situation.

If I was doing that at work I'm sure somebody would be fired.

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#2693275 - 04/07/13 09:25 PM Re: Gear oil change [Re: coolguy147]
Loafy Offline
Member

Registered: 07/13/11
Posts: 118
Loc: Okanagan, British Columbia
I never waited on my car... but then now if I really think about it. I never put RTV. I'm pretty sure I cleaned it up real well, and just tightened the bolts in a criss-cross pattern for a nice seal. No leaks.

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#2693280 - 04/07/13 09:30 PM Re: Gear oil change [Re: coolguy147]
Loafy Offline
Member

Registered: 07/13/11
Posts: 118
Loc: Okanagan, British Columbia
For my Valve covers I let the RTV sit for 15 mins before I completely torqued er down. Build a skin g'know!

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#2693355 - 04/08/13 05:31 AM Re: Gear oil change [Re: coolguy147]
coolguy147 Offline
Climber

Registered: 10/23/11
Posts: 813
Loc: Florida
Well, the manual says it must be applied within 15 minutes. I'm sure there was a little wait time on it because it took some time to put the stuff all the way around. I'm think, I'm ok?
_________________________
1998 Mercury Grand Marquis LS
-Dual exhuast swap with muffler delete
-JMOD

12X,XXX

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#2693537 - 04/08/13 04:47 PM Re: Gear oil change [Re: coolguy147]
theperfectdrugsk Offline
Member

Registered: 10/14/08
Posts: 179
Loc: Idaho
The wait time is the time you should wait before exposing it to gear oil (or water or whatever it is the gasket is sealing against). Pretty sure you don't need to wait to put the diff cover on the diff.

1. RTV on diff cover
2. diff cover to diff
3. wait 1 hour
4. add gear oil
_________________________
2007 CVPI, headlight relay upgrade. 94k and counting.

1999 CVPI, headlight relay upgrade, pioneer amp, 10" kicker subs. RIP at 206k frown

1991 Bronco Super Fancy Silver Edition. 98k miles.

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#2693565 - 04/08/13 05:55 PM Re: Gear oil change [Re: theperfectdrugsk]
coolguy147 Offline
Climber

Registered: 10/23/11
Posts: 813
Loc: Florida
Originally Posted By: theperfectdrugsk
The wait time is the time you should wait before exposing it to gear oil (or water or whatever it is the gasket is sealing against). Pretty sure you don't need to wait to put the diff cover on the diff.

1. RTV on diff cover
2. diff cover to diff
3. wait 1 hour
4. add gear oil


It clearly says, "NOTE: Axle housing cover must be installed within 15 minutes of application of the silicone rubber or new silicone rubber must be applied."

Doesn't talk about a wait time for the RTV to be installed. The next step is to add the lubricant after the housing cover is torqued down. I think I'm fine since I wait roughly 40-45 minutes before I added everything. Plus, I live in Florida.
_________________________
1998 Mercury Grand Marquis LS
-Dual exhuast swap with muffler delete
-JMOD

12X,XXX

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#2693660 - 04/08/13 08:57 PM Re: Gear oil change [Re: coolguy147]
theperfectdrugsk Offline
Member

Registered: 10/14/08
Posts: 179
Loc: Idaho
Exactly. RTV stands for Room Temperature Vulcanizing silicone. RTV and silicone rubber are the same thing, I've just heard it's best to let the RTV/silicone rubber cure a bit (meaning after assembling the axle and cover) before adding the gear oil.

That said, I was in a hurry and only waited about 30 minutes before adding the oil, and I haven't had any leaks or anything, so you're probably fine.
_________________________
2007 CVPI, headlight relay upgrade. 94k and counting.

1999 CVPI, headlight relay upgrade, pioneer amp, 10" kicker subs. RIP at 206k frown

1991 Bronco Super Fancy Silver Edition. 98k miles.

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#2693703 - 04/08/13 09:32 PM Re: Gear oil change [Re: theperfectdrugsk]
coolguy147 Offline
Climber

Registered: 10/23/11
Posts: 813
Loc: Florida
Originally Posted By: theperfectdrugsk
Exactly. RTV stands for Room Temperature Vulcanizing silicone. RTV and silicone rubber are the same thing, I've just heard it's best to let the RTV/silicone rubber cure a bit (meaning after assembling the axle and cover) before adding the gear oil.

That said, I was in a hurry and only waited about 30 minutes before adding the oil, and I haven't had any leaks or anything, so you're probably fine.


Yea, did the same thing. It was 10pm and I needed to go somewhere lol. Thanks for your help!!!
_________________________
1998 Mercury Grand Marquis LS
-Dual exhuast swap with muffler delete
-JMOD

12X,XXX

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#2693707 - 04/08/13 09:34 PM Re: Gear oil change [Re: coolguy147]
coolguy147 Offline
Climber

Registered: 10/23/11
Posts: 813
Loc: Florida
While changing my gear oil I decided to inspect the differential. I get a slight clunk when I go from reverse to drive or drive to reverse. Ujoints? No play in the driveshaft but I did notice play in the spider gears. How much play is allowed in the spider gears? With the whole rear end jacked up, I can rotate one tire and feel the play when I rotate it the opposite way. I can kinda see the play in the spider gears themselves.
_________________________
1998 Mercury Grand Marquis LS
-Dual exhuast swap with muffler delete
-JMOD

12X,XXX

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#2693756 - 04/08/13 10:52 PM Re: Gear oil change [Re: coolguy147]
theperfectdrugsk Offline
Member

Registered: 10/14/08
Posts: 179
Loc: Idaho
I think the clunk is normal...i guess it depends on how much youre talking about. I've only ever had vehicles that aren't limited slip...might be different with LS? As long as there aren't chunks of metal in the gear oil, I'd say you don't have much to worry about.
_________________________
2007 CVPI, headlight relay upgrade. 94k and counting.

1999 CVPI, headlight relay upgrade, pioneer amp, 10" kicker subs. RIP at 206k frown

1991 Bronco Super Fancy Silver Edition. 98k miles.

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#2693820 - 04/09/13 05:46 AM Re: Gear oil change [Re: coolguy147]
Black_Sunshine Offline
Poobah

Registered: 12/09/10
Posts: 7817
Loc: AZ
I don't think that the RTV curing is as important with the rear because it's not under pressure like the cooling system or the crankcase.
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2005 Grand Marquis GS Two Tone Edition

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• front door sill plates that say ‘Grand Marquis’

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#2693860 - 04/09/13 09:07 AM Re: Gear oil change [Re: coolguy147]
theperfectdrugsk Offline
Member

Registered: 10/14/08
Posts: 179
Loc: Idaho
Yeah...I accidentally bought the red RTV instead of the black...so I was a little worried that the gear oil would prevent it from drying properly, since it wasn't the "maximum oil resistance." Haven't had any problems though.

As an aside, apparently permatex now makes an RTV tube specifically for gear oil and differentials.
_________________________
2007 CVPI, headlight relay upgrade. 94k and counting.

1999 CVPI, headlight relay upgrade, pioneer amp, 10" kicker subs. RIP at 206k frown

1991 Bronco Super Fancy Silver Edition. 98k miles.

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