rear gear fluid? capacity and viscoscity?

msolaas1 · July 7th, 2007, 02:46 PM

hey guys im just checkin i was going to change the fluid in my rear but i could only get my hands on two bottles of 75w-90... will that work or do i need something else?

please let me know
kris

HMUSN · July 7th, 2007, 02:47 PM

your gonna need another bottle.

msolaas1 · July 7th, 2007, 09:20 PM

but that wieght is gonna work? cause i read in the manual that it calls for 75w 140... so i'm good with that?

thanks
kris

HMUSN · July 7th, 2007, 09:21 PM

i forget the weight to be honest but you should run high performance gear oil anyway.

try Royal purple . it's good stuff

07 Bossedup GT · July 7th, 2007, 11:46 PM

DO NOT use 75W-90. It does not support GL5 "EP" requirements. There is a reason Ford (per the manual) requires 75-140W lubricant! Since you did not mention mileage, year or circumstance, the next question is.....why are you changing

? Ford does not even reference a service interval on the Mustang rear diff in the 2007 Scheduled Maintenance Guide. If you are doing a complete dump, note that a FRICTION MODIFIER additive (again in the manual) is required.

msolaas1 · July 8th, 2007, 12:10 AM

its an 05 that i got railed and it bent my rear housing so i got a used one out of a 06... they sent it dry... i'm only putting fluid in it for about a month then draining it back out to do gears once i have the money... how bad is it to run the 75w 90? im not trying to second guess any1's opinions just wanna know if i can make this work for a little bit

thanks

MustangMatt96GT · July 8th, 2007, 12:23 AM

Well I just got my gears installed this week on my 96 and they filled her up with normal 80W90 and said that they have had the best success with that! But to answer your question, I really dont know!

07 Bossedup GT · July 10th, 2007, 12:03 AM

Motor oil will work, for a while. Put the proper weight lube and modifier in and if 1 month turns into 6, you won't end up on foot. Your call.

July 7th, 2007, 02:46 PM	#1
msolaas1 Regular Join Date: Apr 2007 Posts: 71 iTrader: 0 reviews	rear gear fluid? capacity and viscoscity? hey guys im just checkin i was going to change the fluid in my rear but i could only get my hands on two bottles of 75w-90... will that work or do i need something else? please let me know kris __________________

July 7th, 2007, 02:47 PM	#2
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,047 iTrader: 11 reviews	your gonna need another bottle. __________________

July 7th, 2007, 09:20 PM	#3
msolaas1 Regular Join Date: Apr 2007 Posts: 71 iTrader: 0 reviews	but that wieght is gonna work? cause i read in the manual that it calls for 75w 140... so i'm good with that? thanks kris __________________

July 7th, 2007, 09:21 PM	#4
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,047 iTrader: 11 reviews	i forget the weight to be honest but you should run high performance gear oil anyway. try Royal purple . it's good stuff __________________

July 7th, 2007, 11:46 PM	#5
07 Bossedup GT Newbie Join Date: Jul 2007 Location: Laguna Park, Tx Posts: 19 iTrader: 0 reviews	DO NOT use 75W-90. It does not support GL5 "EP" requirements. There is a reason Ford (per the manual) requires 75-140W lubricant! Since you did not mention mileage, year or circumstance, the next question is.....why are you changing ? Ford does not even reference a service interval on the Mustang rear diff in the 2007 Scheduled Maintenance Guide. If you are doing a complete dump, note that a FRICTION MODIFIER additive (again in the manual) is required. __________________ 07 Grabber Orange GT-custom black accents JBA longtubes-FRPP GTA's Saleen Watts Link BMR LCA relo kit Eibach Sportlines-Pro Dampeners C&L Racer CAI-SCT Excalibrator Spyder shaft-5 spd-FRPP 3.73's Hurst shifter Ram Air Shaker

July 8th, 2007, 12:10 AM	#6
msolaas1 Regular Join Date: Apr 2007 Posts: 71 iTrader: 0 reviews	its an 05 that i got railed and it bent my rear housing so i got a used one out of a 06... they sent it dry... i'm only putting fluid in it for about a month then draining it back out to do gears once i have the money... how bad is it to run the 75w 90? im not trying to second guess any1's opinions just wanna know if i can make this work for a little bit thanks __________________

July 8th, 2007, 12:23 AM	#7
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,688 iTrader: 3 reviews	Well I just got my gears installed this week on my 96 and they filled her up with normal 80W90 and said that they have had the best success with that! But to answer your question, I really dont know! __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

July 10th, 2007, 12:03 AM	#8
07 Bossedup GT Newbie Join Date: Jul 2007 Location: Laguna Park, Tx Posts: 19 iTrader: 0 reviews	Motor oil will work, for a while. Put the proper weight lube and modifier in and if 1 month turns into 6, you won't end up on foot. Your call. __________________ 07 Grabber Orange GT-custom black accents JBA longtubes-FRPP GTA's Saleen Watts Link BMR LCA relo kit Eibach Sportlines-Pro Dampeners C&L Racer CAI-SCT Excalibrator Spyder shaft-5 spd-FRPP 3.73's Hurst shifter Ram Air Shaker

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