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Old 01-08-2014, 02:23 PM
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Transmission Service and Valve Body Questions

Hey guys, so my new truck (2001 7.3 4x4) is due for transmission service. I've been trying to find an answer to this question but can't seem to get a straight answer... What is the difference between a transmission flush and a transmission fluid change/ service? The reason I ask is because originally my understanding was that the transmission takes 18 quarts of fluid, but then I watched a video on a tranny fluid change on a 2000 7.3 and they said it takes 8 quarts of fluid. Obviously a very significant difference. And I've been wanting to install a BTS valve body to improve shift quality and longevity, but my truck has 206k miles on the original tranny. I figure that it's not going to be good for much longer, so my question is if I put a modified valve body in and the tranny goes soon, will I have just wasted money on it or will it still be good? Hopefully someone can steer me in the right direction. Thanks
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Old 01-08-2014, 07:06 PM
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most guys just service them, which means dropping the pan and changing the filter then refilling. this takes 8 quarts. every 20k-30k miles

and do the transfer case while your doing the trans, it takes 5 minutes to do. 2 quarts of atf for the trans case.

i used the top off a gear oil bottle to squirt the atf in the trans case.

and has the trans been serviced regularly? if no i wouldnt worry about the valve body
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Old 01-08-2014, 09:24 PM
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Mzarlenga the difference is a machine will hook up to your tranny and flush out the converter when you change the oil and filter you will drain just what will flow out. As for the valve body, anything that improves the shift in automatic helps.

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Old 01-08-2014, 09:42 PM
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at 206k there is going to be wear from the stock trans shifting pattern (soft shifting creates lots of heat and wears the clutch packs down)
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Old 01-09-2014, 03:00 AM
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Ok so when you do a service do you do the torque converter as well? If you do how many quarts does it take? And I'm still curious as to what some other guys were talking about when they said the transmission takes a total of 18 quarts of fluid...
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