This is a step by step instructional video on how to replace the spider gears inside a Ford 7.5 & 8.8 open differential. While I’m working on a ’98 Ford Mustang, this video applies to many Ford models & years since these rear ends have been in use for decades.
I show many tips & tricks to make this job quick, easy & painless. The actual labor part of this job takes about two hours. If you use RTV for the differential cover gasket then you’ll have to wait 12 to 24 hours for it to properly cure before adding fluid. There are gaskets available at most auto parts stores that work very well too that don’t have a wait time.
How To Change Ford 7.5 & 8.8 Differential Fluid – Ford Mustang:
https://youtu.be/jIXoRbIIK_o
How To Replace Axle Seals & Bearings In Ford 7.5 & 8.8 Differential – Ford Mustang:
http://youtu.be/VXEqzMVRRso
How To Replace Rear Brake Pads & Rotor – Ford Mustang (’94 – ’04):
https://youtu.be/m5MxG1m7X5U
My “’98 Ford Mustang 3.8L Repair & Maintenance” Playlist:
https://www.youtube.com/playlist?list=PLRaskbwUWbopRr2kgSkqn6EZfF41QADTj
My “General Auto Repair & Maintenance” Playlist:
https://www.youtube.com/playlist?list=PLRaskbwUWbopurXSiOKsO7sSe-m_ruZ7U
The information in this video is for educational purposes only. Pet Rock assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use the information in this video at your own risk. Pet Rock recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not Pet Rock.
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man i can NOT line tgese spider gears up with
great video! very well shot and very informative! thank you!
4:28 That pin was a nightmare for me! It took me a long long time to get that motherfucker out. I had to use a angle grinder, sledge hammer and a lot of force and violence. That pin is a jerk!
I have decided my 4:10 gears are a little low as I have only been on the track once with it and now mostly drive on a highway to and from work. I have purchased 3:73 gears but am wondering if I need new bearings since the gears only have about 10K miles on them since replacement. (The entire rear axle was redone when I replaced the original gears.) '97 Mustang GT'
Any adise?
I have a 2005 mustang the rear axle makes a rumbling noise but when I move the wheel back and forth the tone doesn't seem to change so I don't think its the wheel bearings there is no leakage in the pinion at drive shaft any ideas ??……………I have read everything from throwing a banana in there to quite it down ….. but after seeing your video it makes me want to fix it correctly.
I never realized those thrust washers were in there. Any way to tell whether or not one of them fell out without pulling the diff cover and losing all the new oil? I had my axle shafts out today and accidentally spun the spider gears and one fell out. I put it back in, but now I'm wondering if one of those washers is missing… not good!
Hey Pet Rock, if i have leaking axle seals and wanna do those and bearings do i have to take out the gears or am i able to just remove those clips and the axles and leave the spider gears and side gears intact? i have an 04 gt 8.8 in rear end. Thanks for the vid!
Is this a limited slip Diff? I don't have a LSD. I have to change my gears out and am not sure if it has spider gears in it or not. thanks in advance.
FANTASTIC INFORMATIVE Going to attack this job rear driver side bearing starting to make noise thanx
My 05 mustang is making a noise inside the differential yours was making gear noise when speeding at 20 mph to ?
American Muscle says to "Use a punch or paint pen to mark the orientation of the two differential bearing caps (left, right, top, bottom). It is critical that these caps are reinstalled in the position that they were removed". I noticed you didn't do any such thing. What's the difference?
I had a question my 2008 mustang v6 just got installed 3.73 from motive and an LSD from Yukon and I turned it into the shop they effed me over stang sounded worse than before it went in usually when coasting accelerating (unless I get on it hard, no pun intended) and decelerating makes a whining sound as if the rear end was dry. What do you think it is?
my spider gear on passenger side won't come out. axel is removed… I'm talking about the one that has splines for the axel. ford 7.5
question, about the rubber O rings on the inside of the left and right shafts. does it ride to the outside of the clips towards the splines or on the inside towards the center of the car?
Do you have to take the upper control arm off. The rear end of a 2004 ford explorer. To change the spider gears
for some reason i can't get the shaft to pull out of the drivers side.i removed the ring that locks it in but it snags on something. the passenger side pulled out easy. what did i do wrong?
I inspected my spider gear on my 96 mustang 7.5 rear end Due to noise while turning, they are worn out, When I had the car jacked up and spun both axles, keeping the other one still, the noise was the same, Does that mean my axle tube bearings are likely ok, Just need the Spider gears?
very helpful, saved me from having a heart attack. i did this on a 2010 crown victoria p71 . thank you.
You're on of the best youtubers at describing what to do. Thank you!!
10:13 i didnt see that washers on my pinion gears i hope i didnt leave that thing out i have ford mustang 2003 base i am worried now