9" Ford diff gear oil

Tim H · 05-05-2010, 08:16 PM

What is the gear oil capacity for 9" diff. Strip car only using a spool.

BlueOval Ralph · 05-06-2010, 07:33 AM

Which housing are you using? It makes a difference.
Ralph

Quote:

Originally Posted by Tim H

What is the gear oil capacity for 9" diff. Strip car only using a spool.

Tim H · 05-06-2010, 05:29 PM

Stock housing narrowed, "war" centre section for now.

rod · 05-07-2010, 01:09 PM

9" fords need extra gear lube. the front bearings do not oil as well in race conditions as in a street car. using a smooth spool actually makes matters worse as there is nothing to 'throw' oil up to the top tunnel which oils the front bearing.
some cases have a front plug [driver side] which can be checked for lube. some housing have a factory fill hole. if you have one of these type case/housing...then you may have to tip the car to one side to add extra lube. fill to 'normal' and then add, ad minimuuuun 1/2 pint if you have neither, then you most likely have a welded filler towards to the top. you will have to design a dip stick. something on the order of half way.
2 1/2 quarts is about right, unless you have a very narrow housing.
using a spool, you can use snythetic lube. which will help ET. if someone is using a ford trac-lok or some other type of clutch differential, DO NOT use snythetic lube or any additive which would normally used for street use.
also remember extra lube requires extra time to warm the lube to a good operating temp. thick lube costs ET.
rod

Tim H · 05-07-2010, 08:29 PM

Good info thanks. I am thinking 3 litres should be good, housing is narrowed. Checked with a buddy today and he uses 3 litres in his narrowed 9" Camaro and just ran 5.70's last weekend. ( about 1/2 second quicker than I hope to go eventually). 1 Us Quart = .946 ml. ...

05-05-2010, 08:16 PM	#1
Tim H VIP Member Join Date: Jan 2007 Posts: 1,039 Likes: 1,057 Liked 481 Times in 158 Posts	9" Ford diff gear oil What is the gear oil capacity for 9" diff. Strip car only using a spool.

05-06-2010, 05:29 PM	#3
Tim H VIP Member Join Date: Jan 2007 Posts: 1,039 Likes: 1,057 Liked 481 Times in 158 Posts	Re: 9" Ford diff gear oil Stock housing narrowed, "war" centre section for now.

05-07-2010, 01:09 PM	#4
rod Member Join Date: Dec 2009 Location: Kingman, NW AZ. in the middle of the longest stretch of Route 66 Posts: 313 Likes: 0 Liked 20 Times in 15 Posts	Re: 9" Ford diff gear oil 9" fords need extra gear lube. the front bearings do not oil as well in race conditions as in a street car. using a smooth spool actually makes matters worse as there is nothing to 'throw' oil up to the top tunnel which oils the front bearing. some cases have a front plug [driver side] which can be checked for lube. some housing have a factory fill hole. if you have one of these type case/housing...then you may have to tip the car to one side to add extra lube. fill to 'normal' and then add, ad minimuuuun 1/2 pint if you have neither, then you most likely have a welded filler towards to the top. you will have to design a dip stick. something on the order of half way. 2 1/2 quarts is about right, unless you have a very narrow housing. using a spool, you can use snythetic lube. which will help ET. if someone is using a ford trac-lok or some other type of clutch differential, DO NOT use snythetic lube or any additive which would normally used for street use. also remember extra lube requires extra time to warm the lube to a good operating temp. thick lube costs ET. rod

05-07-2010, 08:29 PM	#5
Tim H VIP Member Join Date: Jan 2007 Posts: 1,039 Likes: 1,057 Liked 481 Times in 158 Posts	Re: 9" Ford diff gear oil Good info thanks. I am thinking 3 litres should be good, housing is narrowed. Checked with a buddy today and he uses 3 litres in his narrowed 9" Camaro and just ran 5.70's last weekend. ( about 1/2 second quicker than I hope to go eventually). 1 Us Quart = .946 ml. ...