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Old Mar 8, 2005 | 11:58 AM
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Differential?

It feels like its coming from the differential, its like gears not clicking in, get a little kick feeling. Usually only happens when i do something like hit the gas, let off fast, then hit gas again. Is this just down shifting or should i be looking for some new gears.
 
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Old Mar 8, 2005 | 02:37 PM
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Could be a locking pin in your differential. Remove the cover and see if there is any metal shavings or small pieces. If nothing then at least you can get a look at your gears to see if they are over worn. jack the back end up first and block the front wheels. put the tranny in Neutral and you can spin the tires and get a look at all of the gears. Just please use jackstands... could get ugly if the truck drops off the jack or if the jack fails.
 
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Old Mar 8, 2005 | 02:53 PM
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I've never done anything with differential. Your talking about taking the differential cover off right? There's a lubricant in the case correct? How do I go about refilling it, draining, and resealing? Thanks again for the help.
 
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Old Mar 9, 2005 | 09:12 AM
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Yes I am talking about removing the diff cover...and yes there is fluid. What I usually do is LOOSEN the bolts fisrt with the bottom ones further out than the top. That way I can pop the bottom open enough to drain it without getting it all over me. Then remove the bolts and open it up. As for refilling it, you can buy replacement fluid in a bottle that has like a long spout on it. Fill it till it just starts to dump back out of the fill hole. As for sealing it, gaskets are cheap from yor local parts store. Now I know that our diffs are finicky about what type of fluid we use in them, so can someone else chime in about brand and type he should use?
Thanks!
 
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Old Mar 9, 2005 | 09:34 AM
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Originally Posted by BillyBob69
Yes I am talking about removing the diff cover...and yes there is fluid. What I usually do is LOOSEN the bolts fisrt with the bottom ones further out than the top. That way I can pop the bottom open enough to drain it without getting it all over me. Then remove the bolts and open it up. As for refilling it, you can buy replacement fluid in a bottle that has like a long spout on it. Fill it till it just starts to dump back out of the fill hole. As for sealing it, gaskets are cheap from yor local parts store. Now I know that our diffs are finicky about what type of fluid we use in them, so can someone else chime in about brand and type he should use?
Thanks!
I just changed the diff fluid in my 99 f-150 4x4, my manual says to use 75-140 for the rear, and 75-90 for the front(if 4x4)As for brand, i went with Royal Purple brand just because of thier reputation. They come in bottles that are .9 liters each, my front took 2 and my rear took 3.5 bottles but that depends on your vehicle. For resealing the rear diff cover i used silicone sealer instead of geting a new gasket(they do the same thing). To make things alot easier, buy a $4 plastic pump for the front diff...you will see once u get that far how much time it will save.
Hope this will help.
John

99 f-150 ext. cab
rear steel buper..grilleguard w/4 KC lights
tool box..bed linner
dual exaust..K&N air intake...
 
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Old Mar 9, 2005 | 09:45 AM
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Thanks a lot for all the info guys. One last question though, how much time should i set aside for doing all of this? Seeing as it is my first time should I plan on a saturday or for it carrying over into a second day?
 
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Old Mar 9, 2005 | 09:46 AM
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hey i have a 98 f-150 4x2 that keeps eating up the carrier bearing this will be the third time in a year 1/2 its been in the shop ! any idea what could be going on ?
 
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Old Mar 9, 2005 | 11:48 AM
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Fordman, taking the cover off and taking a look is not a big deal even if you have never done it. Including a beer run, about an hour and a half.

Scort71, if you are eating carrier bearings, they are not setting it correctly when they install it, I suggest you find another shop that knows what they are doing. Either that or they failed to clean out the axle housing of any debris from previous and it is getting into the new bearings and destroying them. Again, suggest you find another shop.
 
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Old Mar 9, 2005 | 12:48 PM
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thanks for the info i am taking it to another shop for sure !!
 
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Old Mar 12, 2005 | 02:21 PM
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I take it there is no drain plug on the stock differential cover? Where is the refill plug located?
 
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Old Mar 12, 2005 | 05:04 PM
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Originally Posted by fordman311
I take it there is no drain plug on the stock differential cover? Where is the refill plug located?
There is 2 plugs on the front diff, one for draining and one for filling/checking the level. They are both on the front side and can be reached fairly eaisily. For the back diff, there is only one plug on the top front section of the diff. The plug is a refill/check plug and is not low enough to drail the fluid, that is why you must take the whole cover off the back to drain the old gear oil. Once drained, simply put cover back on and fill oil through refill plug(untill you can stick your finger through it and feel oil).[to make it easier i sugest buying some cheap metal ramps that will raise your vehicle about 6 inches ]
Hope this will help,
John

99 f-150 ext. cab(82,000)
rear steel buper..grilleguard w/4 KC lights
tool box..bed linner
dual exaust..K&N air intake...<!-- / message -->
 
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Old Mar 12, 2005 | 06:25 PM
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Thanks for the info sbeII, I guess I should go ahead and do both at once, is the front refill plug just hard to get to and therefore you recommend a pump?
 
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Old Mar 12, 2005 | 11:49 PM
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A pump is good to use to keep from having to open the cover if all your going to do is change the fluid....or it keeps from making a mess when you pull the cover. But if your going to change the fluid, then it usually is good to see if there are any "floaties", (metal peices), in the fluid.
 
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Old Mar 13, 2005 | 09:31 AM
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Originally Posted by fordman311
Thanks for the info sbeII, I guess I should go ahead and do both at once, is the front refill plug just hard to get to and therefore you recommend a pump?
I would say do them both at once just because you have no idea if they are in good condition of not. When i did mine, the rear one was perfectly fine but the front one had water all in it. The only reason i suggest using a pump on the front is because the fill plug is hard to get to. On the back, the fill plug is easy to get to and work with.
Good Luck
John
99 f-150 ext. cab(83k)
rear steel buper..grilleguard w/4 KC lights
tool box..bed linner
dual exaust..K&N air intake...
 
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Old Mar 13, 2005 | 10:43 AM
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An easy way to refill the rear diff is to remove the ABS sensor from the top of the housing and pour the oil in there.
 
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