I'm a newbie here. Just bought a cherry 93 GT from the original owner. After driving it back from Houston, TX last weekend I took it to my local oil change place to get it serviced. Getting the engine oil (Mobil 1) and transmission (semi-synth ATF) changed was no problem. However, they told me that they could not gain access to the rear differential drain plug due to something being in the way.
Later, I had taken it to a brake shop to get the brake fluid flushed (it was dark and gungy looking) and have the brakes checked over. While the car was on the lift I noticed that at front of the rear differential, UNDER where the driveshaft is fastened, there was a sort of big metal piece bolted along the bottom front of the diff.
Question:
1. What is this thing and what is it purpose?
2. Does this need to be removed in order to gain access to the drain and fill plugs for the diff?
3. Is there any special precautions to be taken to remove it if it needs to be removed?
Thanks. More questions later.
My car is a 93 5.0L 5 Speed with 115K. All mechanical work has been done by the single owner prior to me and the car runs just great. In fact, I averaged > 25 MPG on the 1000 mile trip from Houston back to Colorado. I was amazed. I have a 3.08 rear diff so I'm surprised the mileage was so good.
i don't think they came with drain plugs man.... u gotta pull the inspection plate or suck the fluid out of the check plug...
yeah i just ran out to my car crawled underneath and checked, killed my ribs might i tell you, (party on friday passed out woke up with a cracked rib or 2) their's no drain, it's gotta have the inspection plate cover pulled or use a tool we call @ my work a devac basicly it's an air pump that we use to suck fluids out of anywhere, front and rear diffs mostly, coolant resivoirs we use it for too, when we do rads but off subject, u can't just pull the plug drain it and re fill it, the guys u were talking to didn't know what they were talking about.... take it to a quick change place, when they call to their lower technition to service the rear diff make sure they say gl-5 and slip or limited slip additive, they will either pull the plate off or use the devac, if u want it done really well, pull the inspection plate off and rince the diff out with brake clean i think it is, then put the plate back on after letting it dry for a few minutes and refill it, that's what i am gonna do with mine
i work @ a quick lube place so that's how i know this stuff
also welcome to the forums make sure to help other people out when u can
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89 fox, mostly stock, C&L 73mm MAF, bypassed coolant hoses to egr spacer, intake silencer removal, no a/c, all options but power mirrors?? blown cats, msd cap and rotor, bosch wires, autolite plugs, 5 inch auto gauge tach with recal and blue lensed shift light, PAPER FILTER I BOUGHT ONE!!!!!!! felpro gasgets on everywhere accept oil pan and a nice big classic mustang decal on my back window
There is no drain plug on the stock differential cover. The fill plug is in a very awkward but doable position on the drivers side of the differential. It uses a 3/8 ratchet or breaker to remove it. Make sure when you add the gear oil that you get Ford friction modifier from the dealer. It's a tiny bottle. I used 85w90 gear oil.
That's funny, unable to get access to it.... because there is NO PLUG. They probably didnt want to fuss with applying silicone to seal it back.
that's what i was thinking, yeah i would use 75-90 or thicker, i am probibly going to a 75-140 synthetic, just cuz of my mileage (222 666 kilometers)but yeah definetly get a limited slip additive or a friction modifier, otherwise u will basicly have a spool diff, it will be locked solid no matter what, or it will lock up (left wheel to right wheel, not stop them) for no reason and break ur ass end lose around a corner, can be dangerous
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89 fox, mostly stock, C&L 73mm MAF, bypassed coolant hoses to egr spacer, intake silencer removal, no a/c, all options but power mirrors?? blown cats, msd cap and rotor, bosch wires, autolite plugs, 5 inch auto gauge tach with recal and blue lensed shift light, PAPER FILTER I BOUGHT ONE!!!!!!! felpro gasgets on everywhere accept oil pan and a nice big classic mustang decal on my back window
that's what i was thinking, yeah i would use 75-90 or thicker, i am probibly going to a 75-140 synthetic, just cuz of my mileage (222 666 kilometers)but yeah definetly get a limited slip additive or a friction modifier, otherwise u will basicly have a spool diff, it will be locked solid no matter what, or it will lock up (left wheel to right wheel, not stop them) for no reason and break ur ass end lose around a corner, can be dangerous
your right that you need the modifier but your a little off in what it does...iv seen guys forget to put it in and what that does is ruin the clutches and makes the rear act like a open rear (one wheel peel). the modifier helps the clutches to grab and work right.......just letin you know
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94 gt aode baumannator,pi stallion 3000 stall,transgo,mega bite jrs,3.90 gears,31 spine moser axles,comp exteme,1.7 roller rockers,190 pump,mac cold air,ford 1 5/8 unequals, off road h,flowmaster 2 chamber with stainless tails,msd box,PIH(a9p computer ajustable fan controler),q1a k-member,kenny brown frame ties,driveshaft loop,air pump eliminator kit,bbk 70mm tb,pro-m bullit meter,24#injecters,ported heads&intake,and all the little bolt ons.
I'm a newbie here. Just bought a cherry 93 GT from the original owner. After driving it back from Houston, TX last weekend I took it to my local oil change place to get it serviced. Getting the engine oil (Mobil 1) and transmission (semi-synth ATF) changed was no problem. However, they told me that they could not gain access to the rear differential drain plug due to something being in the way.
Later, I had taken it to a brake shop to get the brake fluid flushed (it was dark and gungy looking) and have the brakes checked over. While the car was on the lift I noticed that at front of the rear differential, UNDER where the driveshaft is fastened, there was a sort of big metal piece bolted along the bottom front of the diff.
Question:
1. What is this thing and what is it purpose?
2. Does this need to be removed in order to gain access to the drain and fill plugs for the diff?
3. Is there any special precautions to be taken to remove it if it needs to be removed?
Thanks. More questions later.
My car is a 93 5.0L 5 Speed with 115K. All mechanical work has been done by the single owner prior to me and the car runs just great. In fact, I averaged > 25 MPG on the 1000 mile trip from Houston back to Colorado. I was amazed. I have a 3.08 rear diff so I'm surprised the mileage was so good.
I have been lurking here for about 3 months.
Thanks,
Tom
That large piece of metal like thing you see is probably what is called the dogbone and it has to do something with driveline vibrations.
That large piece of metal like thing you see is probably what is called the dogbone and it has to do something with driveline vibrations.
not too sure which u guys are talking about unless it's the rear sway bar... and that's not in the way of the inspection cover
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89 fox, mostly stock, C&L 73mm MAF, bypassed coolant hoses to egr spacer, intake silencer removal, no a/c, all options but power mirrors?? blown cats, msd cap and rotor, bosch wires, autolite plugs, 5 inch auto gauge tach with recal and blue lensed shift light, PAPER FILTER I BOUGHT ONE!!!!!!! felpro gasgets on everywhere accept oil pan and a nice big classic mustang decal on my back window
not too sure which u guys are talking about unless it's the rear sway bar... and that's not in the way of the inspection cover
I believe he is talking about the large rectangular piece of metal with 2 bolts in it towards the front of the underside of the differential. I have no idea what it's for either, but it doesn't have anything to do with changing the fluids in the diff. Just another Unsolved Mystery................. dum dum dum
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Stephen and the Blue Demon
89 LX vert
Holley 750, Edelbrock Vic Jr, TFS T/W heads, FRPP X cam, Crane 1.6 rr's, longtubes w/Dynomax Bullets, PA Super Comp C4 w/brake, Precision Performance Kwik Shift II, Art Carr 3200 w/ ballooning plate, NOS super powershot plate, complete UPR tubular front suspension w/coilover conversions on Lakewood 90/10's
what years are ur cars? mine does not have that... there are no bolt holes either...
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89 fox, mostly stock, C&L 73mm MAF, bypassed coolant hoses to egr spacer, intake silencer removal, no a/c, all options but power mirrors?? blown cats, msd cap and rotor, bosch wires, autolite plugs, 5 inch auto gauge tach with recal and blue lensed shift light, PAPER FILTER I BOUGHT ONE!!!!!!! felpro gasgets on everywhere accept oil pan and a nice big classic mustang decal on my back window
The term for that component is "dog bone" (because of the shape) or "elephant balls". It is indeed in place to curb driveline vibration when the STOCK gearset is used. Once the gearset is changed to a different ratio, it's no longer useful and is sometimes removed.
Looking at the above image, you can see it bolted to the front-underside of the differential housing. It looks like it is nestled between the differential housing and the driveshaft though.
did they put that on all mustangs? cuz mine definetly does not have that
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89 fox, mostly stock, C&L 73mm MAF, bypassed coolant hoses to egr spacer, intake silencer removal, no a/c, all options but power mirrors?? blown cats, msd cap and rotor, bosch wires, autolite plugs, 5 inch auto gauge tach with recal and blue lensed shift light, PAPER FILTER I BOUGHT ONE!!!!!!! felpro gasgets on everywhere accept oil pan and a nice big classic mustang decal on my back window
The term for that component is "dog bone" (because of the shape) or "elephant balls". It is indeed in place to curb driveline vibration when the STOCK gearset is used. Once the gearset is changed to a different ratio, it's no longer useful and is sometimes removed.
Looking at the above image, you can see it bolted to the front-underside of the differential housing. It looks like it is nestled between the differential housing and the driveshaft though.
Thank you for verifying my point. I am sure he was refering to the dogbone because he said forward of the diff.
Newbie Differential Question 
, msd cap and rotor, bosch wires, autolite plugs, 5 inch auto gauge tach with recal and blue lensed shift light, PAPER FILTER 
Stephen and the Blue Demon
