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    2013 Cadillac XTS transfer case / diff fluid help

    Is there any information on what fluids can be used in the AWD transfer case and rear differential? The manual specs ACDelco 19256084 for transfer case fluid, no spec on rear diff. I use Petro-Canada fluids for engine oil and transmission, and would like to stick with them for the transfer case...
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    Rebuilding the GM 4T60E

    The transmission in the Trans Sport starting giving troubles about 20,000 km ago - did a drain and fill which appeared to solve it, but now it's kaput. Forward gear engages, although with all the snow here I haven't road tested it to see if all the gears are present. Reverse does not engage -...
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    Li-polymer constant charge / constant draw

    How much of an effect on cell life would it be if a battery had a constant draw but was also constantly being charged? For example, running a computer directly off a Li-polymer battery pack which has the charger attached.
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    Significance of TBN in ATF?

    I noticed that several ATF companies include TBN numbers in their ATF specs. For example, Petro-Canada Dexron VI has a TBN of 2.0, and I think I read somewhere that Amsoil ATF has a TBN of 12.0. I didn't find anything through a Google search on why TBN would be important - I thought it was to...
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    "Main Filter Group"?

    Has anyone used a Main filter before? They seem to be an industrial filter manufacturer like Donaldson is.
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    How do you 'burp' the cooling system?

    Did a radiator/reservoir drain and fill last night in the Escort, but some air got into the system. I burped it via shop manual instructions - run until warm, then shut off engine and slightly turn radiator cap to release pressure. That sent a bunch of bubbles into the reservoir, and I added...
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    Speed sensitive clunk

    I've been getting a speed-sensitive clunk lately in the front end of my Escape, which I think is one of the CV joints going bad. Just wanted to get a second opinion on the noise. The frequency varies with speed, and happens only when coasting. It disappears when I apply gas or brakes. It sounds...
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