Rear end is leaking

nckissfan · 08-04-2008, 07:35 AM

Hey, my rear end is leaking (on the Cobra).

I am going to take the differential cover off, and redo the seals. What I need to know is how much oil is it going to take to fill it? What brand to use? Thanks

red04svtcobra · 08-04-2008, 07:53 AM

Usually there is a fill hole, just fill it up till it starts to come out then close it up.

As far as weight, I couldn't help you out with that.

nckissfan · 08-04-2008, 07:57 AM

well, when I go buy the oil, will buying one quart be enough? Or, will I need to buy two? I didn't know if there was an exact amount.

nckissfan · 08-04-2008, 12:56 PM

Royal Purple 75w90?

red04svtcobra · 08-04-2008, 06:11 PM

Quote:

Originally Posted by nckissfan

Royal Purple 75w90?

That weight sounds right. I would buy at least 3 but think 2 will do. I can't remember exactely but will try and find out for ya.

bolt-on · 08-04-2008, 06:25 PM

1997 Service Manual specification is 80W90 in a total of 4 Pints. However if using Additive Friction Modifier (4 oz) then you would use 3.75 Pints of rear axle lubricant. Royal Purple claims that friction modifier is not required with their lubricant. The Service Manual states, "Always fill rear axle to bottom of filler hole."

nckissfan · 08-04-2008, 08:21 PM

thanks, bolt on!!

cfradam · 08-04-2008, 11:06 PM

if I recall correctly mine took two of the RP

nckissfan · 08-05-2008, 06:27 AM

cool, thanks.

tazzracing1 · 08-05-2008, 05:27 PM

I did the same thing as Larry stated and still use friction modifier.

**cobrabitn** · 08-05-2008, 09:26 PM

I used Havoline synthetic with friction modifier.

SVTSnak · 08-11-2008, 12:22 AM

I'd definitely use the friction modifier...I used the Royal Purple stuff in a Camaro rear end that I built up and didn't use the friction modifier type stuff per RP's instructions and it didn't take long to destroy the rear end...okay, maybe destroy is a bit excessive, but when I went to change the stuff out (I'm weird...I do it fairly regularly, within reason) there were tons of metal shavings and such in there...main reason I checked it is it felt like I was having "clunking" and possible slippage in the rear and wanted to check it out.

So, for what it hurts to put in friction modifier (nothing), it's worth putting it in, regardless if they say it's not needed or what not.

nckissfan · 08-11-2008, 06:57 AM

thanks, I will do that.

2092CobraMadeIn98 · 08-13-2008, 02:21 PM

Clean the bleeder aswell. The bleeder gets clogged fairly easily causing the fluid to leak.

08-04-2008, 07:35 AM	#1
nckissfan Everyone hates a winner! Join Date: Jan 2004 Location: Browns Summit, NC Posts: 2,810	Rear end is leaking Hey, my rear end is leaking (on the Cobra). I am going to take the differential cover off, and redo the seals. What I need to know is how much oil is it going to take to fill it? What brand to use? Thanks __________________

08-04-2008, 07:53 AM	#2
red04svtcobra Registered User Join Date: May 2007 Location: Mooresville, NC Posts: 1,050	Usually there is a fill hole, just fill it up till it starts to come out then close it up. As far as weight, I couldn't help you out with that. __________________ 2004 Torch Red SVT Coupe (SOLD) 1999 Chevy Malibu (daily driver) 2001 SVT Lightning 408RWHP 501 RWTQ, 12.6 @107 in 1/4 mile & 8.0 @89 in 1/8 on street tires (SOLD) 1993 Chevy camaro Z-28 (SOLD) 1970 VW Bug W/ 1776cc (SOLD) 2007 autofair pics http://www.svtcobraclub.com/forums/s...ad.php?t=15621 Drag racing pics: http://s214.photobucket.com/albums/c...vtcobra/drags/

08-04-2008, 07:57 AM	#3
nckissfan Everyone hates a winner! Join Date: Jan 2004 Location: Browns Summit, NC Posts: 2,810	well, when I go buy the oil, will buying one quart be enough? Or, will I need to buy two? I didn't know if there was an exact amount. __________________

08-04-2008, 12:56 PM	#4
nckissfan Everyone hates a winner! Join Date: Jan 2004 Location: Browns Summit, NC Posts: 2,810	Royal Purple 75w90? __________________

08-04-2008, 06:25 PM	#6
bolt-on WingNuts Join Date: Nov 2001 Location: Cereal City, USA Posts: 273	Rear Axle Lubricant Capacities 1997 Service Manual specification is 80W90 in a total of 4 Pints. However if using Additive Friction Modifier (4 oz) then you would use 3.75 Pints of rear axle lubricant. Royal Purple claims that friction modifier is not required with their lubricant. The Service Manual states, "Always fill rear axle to bottom of filler hole." __________________ Larry & Janice Bolton 1997 Crystal White Cobra Coupe (open-track ride) 1965 Tropical Turquoise Mustang 2+2 (cruise night car) 1997 Rio Red GT Convertible (MCA show pony) 2007 Vista Blue California Special (her summer daily driver)

08-04-2008, 08:21 PM	#7
nckissfan Everyone hates a winner! Join Date: Jan 2004 Location: Browns Summit, NC Posts: 2,810	thanks, bolt on!! __________________

08-04-2008, 11:06 PM	#8
cfradam Registered User Join Date: Feb 2008 Location: orlando Posts: 120	if I recall correctly mine took two of the RP

08-05-2008, 06:27 AM	#9
nckissfan Everyone hates a winner! Join Date: Jan 2004 Location: Browns Summit, NC Posts: 2,810	cool, thanks. __________________

08-05-2008, 05:27 PM	#10
tazzracing1 SCMC Member Join Date: Jul 2004 Location: Paw Paw, michigan Posts: 904	I did the same thing as Larry stated and still use friction modifier. __________________ 2003 S/C Cobra(born 6/10/2002 #439 of 8394) 2.93 pulley/Cold air intake X-pipe with cats/Magnaflowcatback Strut tower bar and subframe connectors MGW shifter second to none/best of the best Billetflow pullies with snub pulley 1997 Cobra(retired) www.michiganmustang.com

08-05-2008, 09:26 PM	#11
cobrabitn Dr Jekyll on the street, Mr Hyde on the track Join Date: Jun 2001 Location: Rock Hill SC Posts: 14,649	I used Havoline synthetic with friction modifier. __________________ Cobrabitn 2016 Ruby Red Metallic with Caribou accent F-350 Crew Cab Stump Puller! 6.7 Diesel Automatic with Chrome Package, Off Road Package, 3.55 Locking axles, and Ultimate Lariat Interior Trim Package! 2017 Shelby GT350 Coupe - track car! Mods: JLT True Cold Air oil catch can 2009 Vista Blue Shelby GT 500 Coupe - Garage Queen Tinted Windows JLT True Cold Air Kit Pro-Dyno Tune 526 rwhp - 511 rwtq 1994 Rio Red Indy Pace Car #22 "Runabout" Snake in the grill MGW shift knob 1996 SVT Cobra Wheels 1969 New Lime Mustang Mach 1 Sportsroof - Second owner - bone stock with shaker. One SVT Cobra, one Shelby GT500, one 69 mach 1, and a Shelby GT350 is better than nothing! Custom Data Plates for your Mustang or Ford! Buy "Cool Merchandise" at Data Plates Plus www.dataplatesplus.com See my MSR Video here!

08-11-2008, 12:22 AM	#12
SVTSnak Registered User Join Date: Jun 2008 Location: Las Vegas babyyyy! Posts: 142	I'd definitely use the friction modifier...I used the Royal Purple stuff in a Camaro rear end that I built up and didn't use the friction modifier type stuff per RP's instructions and it didn't take long to destroy the rear end...okay, maybe destroy is a bit excessive, but when I went to change the stuff out (I'm weird...I do it fairly regularly, within reason) there were tons of metal shavings and such in there...main reason I checked it is it felt like I was having "clunking" and possible slippage in the rear and wanted to check it out. So, for what it hurts to put in friction modifier (nothing), it's worth putting it in, regardless if they say it's not needed or what not. __________________ Mat 1996 Black SVT Cobra SCMC# 1969 Plate: SVTSNAK Totally Mod-Free *South Bay Photography*

08-11-2008, 06:57 AM	#13
nckissfan Everyone hates a winner! Join Date: Jan 2004 Location: Browns Summit, NC Posts: 2,810	thanks, I will do that. __________________

08-13-2008, 02:21 PM	#14
2092CobraMadeIn98 SCMC Member Join Date: Jan 2008 Location: Plymouth Michigan Posts: 51	Clean the bleeder aswell. The bleeder gets clogged fairly easily causing the fluid to leak. __________________ Flirtin' with Disaster. love ya mom, stay strong!

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