Manual downshifting of auto tranny.....
Senior Member
Joined: Oct 2009
Posts: 6,172
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From: Missouri
I pretty well always down shift the OD button for engine braking. I rarely down shift into 2nd unless I'm pulling a trailer or have to stop quick. If I have to stop quickly, I manually down shift and brake at the same time.
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Joined: Jan 2006
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From: Clinton Twp. MI
i do it all the time.. i down shift using the od button and then shiftng into 2nd.. rarely 1st.. makes for a fun ride on the freeway..lol
Last edited by illness95; Oct 11, 2009 at 03:52 PM.
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Joined: Apr 2004
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From: missing Texas...
....OK, maybe I am a bit parinoid. 
Will I hurt my 4R70 tranny ini my '01 SCREW if I manually downshift it?
When I see that I need to stop, I gently push the OD button on the end of the stalk, When that shift has engaged, I then pull the shift lever down to 2nd gear. I rarely need to downshift to 1rst gear, but occasionally do.
When I have a green light, then I move the shift lever back to Drive and push the OD button again.
Will this cause any damage to my tranny? I ahve 170K on it, with fresh fluid and filter and it shifts wonderfully right now.
Will I hurt my 4R70 tranny ini my '01 SCREW if I manually downshift it?When I see that I need to stop, I gently push the OD button on the end of the stalk, When that shift has engaged, I then pull the shift lever down to 2nd gear. I rarely need to downshift to 1rst gear, but occasionally do.
When I have a green light, then I move the shift lever back to Drive and push the OD button again.
Will this cause any damage to my tranny? I ahve 170K on it, with fresh fluid and filter and it shifts wonderfully right now.
what's the point of an automatic if you want a manual???????????? if you want to do that get a manual valve body
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Joined: Dec 2007
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From: NW Montana
And I really have an aversion to putting any $$$ toward my truck in the way of mods, when I have seven kids to take care of.
if im pullin a trailer (which i do most of the time) i will hit the OD button if not already on, then i will pull er down into 2, never do i go into 1 ,and never do i start in 1 and shift to 2 then onto D,
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Joined: Aug 2006
Posts: 359
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From: Mount Laurel, NJ
I could see downshifting when loaded down to help with braking, but not really sure why someone would do this every time they come to a stop light. Just use the brakes. The transmission will downshift when it needs to. All the money you're saving in brakes (which are CHEAP by the way over the course of 30-40k miles service life) you're just wasting in extra gas every time you downshift.
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From: NW Montana
Senior Member
Joined: Aug 2006
Posts: 359
Likes: 1
From: Mount Laurel, NJ
well that may be the case, but when i downshift my truck i always see a mpg or two less than when i just let it coast to a stop in gear. at any rate, i still don't see the point in downshifting an automatic. it just sounds stupid to me.