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Low Transmission Fluid

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Old Apr 4, 2007 | 07:11 PM
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Low Transmission Fluid

My 2000 F150 4x4 has 100,000. I know I should have already change the transmission fluid and filter, but I haven't done any significant pulling until the last 20,000. Tranny fluid looks brand new and no problems, until this morning. I noticed slipping when starting from a dead stop. But then the torque converter would grab. I immediately check the fluid level and it was barely touching the stick. Where did it go? No leaks can be found. I haven't pulled the rubber plug under the Torque Converter yet. Could a leak be inside the housing. Any suggestions would be appreciated.
 
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Old Apr 4, 2007 | 07:38 PM
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Check the transfer case fluid level to see if it's overfull.
A bad transfer case input seal can cause transmission fluid to get into the transfer case.
 
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Old Apr 4, 2007 | 10:29 PM
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Thanks. I will check. Does it have a fill plug? If it runs out, is it overfull?
 
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Old Apr 4, 2007 | 11:34 PM
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On the back of the transfer case there are 2 plugs, a fill/check plug and a drain plug.
They use a 3/8" drive extension and ratchet to remove or install them. The fill plug is above the crossmember, the drain plug is behind it.
The fluid should be right at the level of the top plug. If it runs out it's overfull.
One I worked on today was overfull by about a quart. It ran out pretty fast when I removed the plug.
 
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Old Apr 5, 2007 | 05:33 AM
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Hey Racerguy is it easy to change fluid in transfercase? What type fluid would you recommend?
 
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Old Apr 5, 2007 | 08:39 AM
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Yes it's easy to change the fluid.
You remove the drain plug and out it comes and then put the new fluid in the fill plug hole. The easiest way to get the new fluid in is with a suction gun but you can use a nozzle and hose on the oil jugs instead.
A word of warning.....as the oil drains it hits the crossmember and can make a mess.
The transfer case uses about 2 quarts of Mercon oil. I work in a dealership so we use Motorcraft oil but as long as you use a decent brand you'll be ok.
 
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Old Apr 5, 2007 | 01:43 PM
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Thanks Raceguy for the transfer case info. I need to change that too. However, I did find the leak. It should have been the first place to look, the radiator. I recently replaced the radiator. I had a slow leak at the bottom pipe thread fitting. With a little teflon tape and one skinned knuckle, I fixed the problem in less than ten minutes. Thanks again.
 
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Old Apr 5, 2007 | 02:27 PM
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Good to hear that it wasn't anything too serious
 
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