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  #16  
Old 03-05-2012, 02:25 PM
Eagle Eagle is offline
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Default Re: How To: Change Differential fluid on Open 7.5 rearend

how often should gear oil be changed
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  #17  
Old 06-14-2012, 12:36 PM
cpenny84 cpenny84 is offline
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Default Re: How To: Change Differential fluid on Open 7.5 rearend

How do you know when to use friction modifier? I just did mine and need to put oil in it, so a quick response would be much appreciated. Also mine had a plastic cover on it. Chiltons said they are not reusable so i trashed it and bought a chrome plated steel one.
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  #18  
Old 06-14-2012, 01:20 PM
shizzle8787 shizzle8787 is offline
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Quote:
Originally Posted by cpenny84
How do you know when to use friction modifier? I just did mine and need to put oil in it, so a quick response would be much appreciated. Also mine had a plastic cover on it. Chiltons said they are not reusable so i trashed it and bought a chrome plated steel one.
You only need friction modifier if you have a limited slip rear end.

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Also I've heard bad things about some chrome diff covers being cheap and leaking all the time.

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  #19  
Old 07-02-2012, 10:21 PM
mustangocd mustangocd is offline
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Ok so this is prob a dumb question but how do you know how much oil to put in? Ive never done this before but id like to do it on my truck.
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  #20  
Old 07-02-2012, 11:13 PM
Yeller Yeller is offline
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Great info. About to do this myself.

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  #21  
Old 07-19-2012, 06:30 AM
Bwad Bwad is offline
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Default Re: How To: Change Differential fluid on Open 7.5 rearend

Quote:
Originally Posted by mustangocd View Post
Ok so this is prob a dumb question but how do you know how much oil to put in? Ive never done this before but id like to do it on my truck.
General info on the internet. I searched 7.5 rear end oil change, and I found that I should buy 2 quarts of it.
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  #22  
Old 07-21-2012, 10:43 PM
fixizin fixizin is offline
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Default Re: How To: Change Differential fluid on Open 7.5 rearend

IF your truck isn't radically lifted--i.e. raised your driveshaft/pinion angle--and you're sitting level, then you fill up to the bottom of the fill hole--i.e. it starts coming back out. But yes, you're going to need most of 2 quarts.

PS: the PLASTIC diff cover is one I've never heard of before... what years/models did Ford save a buck by slapping those on???
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  #23  
Old 07-21-2012, 10:48 PM
Bwad Bwad is offline
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Default Re: How To: Change Differential fluid on Open 7.5 rearend

None, as far as I know. Mine isn't plastic.
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  #24  
Old 07-22-2012, 03:03 PM
cpenny84 cpenny84 is offline
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Default Re: How To: Change Differential fluid on Open 7.5 rearend

my 89 had the plastic on it
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  #25  
Old 07-23-2012, 05:45 PM
mustangocd mustangocd is offline
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Thanks!
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  #26  
Old 08-24-2012, 06:29 PM
Dcrymes99ranger Dcrymes99ranger is offline
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Default Re: How To: Change Differential fluid on Open 7.5 rearend

I am going to do this to my truck soon and I had this thread on my mind today, so I just had to search and bring it back up. Thanks for the write up bro!!!!!
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  #27  
Old 08-30-2012, 11:49 PM
JessMoney JessMoney is offline
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Default Re: How To: Change Differential fluid on Open 7.5 rearend

I definately need to do this. How do i know if i have the 7.5 rear end?
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  #28  
Old 08-31-2012, 03:04 AM
Yeller Yeller is offline
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Look at your axle code.

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  #29  
Old 08-31-2012, 07:51 AM
JessMoney JessMoney is offline
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Where do i find that? Im new to working on my vehicle...
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97 Ranger XLT 2.3L SOHC 5 speed.
Outside: Night shade tails and corners. 06 Ranger badges. Blacked out grill. Blacked out stock rims with chrome center caps. Bedliner.
Inside: Camo seat covers, center console lid, floor mats and steering wheel cover. Pilot throttle shifter knob. 12" hifonics sub with Sony head unit. 20% tint. 35% on the windshield.
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  #30  
Old 08-31-2012, 09:25 AM
Yeller Yeller is offline
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Quote:
Originally Posted by JessMoney
Where do i find that? Im new to working on my vehicle...
On the door jamb sticker.



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