Xcal2, WOW
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Joined: May 2005
Posts: 797
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From: houston
Originally Posted by COFX4
Hey guys, that was a typo. I meant 3/4 - Full throttle accelerations....I dont mash the throttle while the tranny is in overdrive...I was talking from a stop. I've never been a fan of 4th to 2nd downshifts anyway, too hard on the drivetrain. Only thing in the manual I saw was to turn off the overdrive if you are going to mash it while you are cruising in overdrive.....Are you saying you are not suppose to accelerate full throttle from a stop with the overdrive on 
Senior Member
Joined: Feb 2004
Posts: 10,390
Likes: 10
Hi ONE04FX4.
Yup - that's what I'm saying... especially if your intent is to command a "4-3-(or)-2" rapid downshift.
Here's a quick link to help explain it:
https://www.f150online.com/forums/sh...WOT+downshifts
You can do a more detailed Search, or consult with Mike concerning your 'tunes' questions if you need more info.
Cheers!
Vic
Yup - that's what I'm saying... especially if your intent is to command a "4-3-(or)-2" rapid downshift.
Here's a quick link to help explain it:
https://www.f150online.com/forums/sh...WOT+downshifts
You can do a more detailed Search, or consult with Mike concerning your 'tunes' questions if you need more info.
Cheers!
Vic
Last edited by MGDfan; Jul 25, 2005 at 01:18 PM.
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Joined: Mar 1998
Posts: 13,385
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From: Virginia
Hi Oneo4FX4,
I'll try to elaborate on that a bit...
First, in our custom tuning, we DO allow you to make a WOT 3-4 upshift, but we only allow that at lower rpms - not at 5400 or 5200 rpm, but more like 4700 rpm max, so as to protect the transmission.
Now when we are talking about a full-throttle DOWNSHIFT, in our docs that we write for each person's custom tune, we advise them to try to get into the habit of not doing WOT 4-2 downshifts, as that is hard on any 4-speed overdrive automatic tranny. Instead, we suggest that they try to get in the habit of quickly tapping the O/D cancel button, which will instantly engage 3rd gear, and THEN nail the throttle so that it does a 3-2 WOT downshift, and that is much better for the transmission. Not *mandatory* mind you, it's just that we try to give tips that will tend to help provide the longest possible transmission service life in these 4-speed overdrive automatics.
I hope that explains it sufficiantely......
I'll try to elaborate on that a bit...
First, in our custom tuning, we DO allow you to make a WOT 3-4 upshift, but we only allow that at lower rpms - not at 5400 or 5200 rpm, but more like 4700 rpm max, so as to protect the transmission.
Now when we are talking about a full-throttle DOWNSHIFT, in our docs that we write for each person's custom tune, we advise them to try to get into the habit of not doing WOT 4-2 downshifts, as that is hard on any 4-speed overdrive automatic tranny. Instead, we suggest that they try to get in the habit of quickly tapping the O/D cancel button, which will instantly engage 3rd gear, and THEN nail the throttle so that it does a 3-2 WOT downshift, and that is much better for the transmission. Not *mandatory* mind you, it's just that we try to give tips that will tend to help provide the longest possible transmission service life in these 4-speed overdrive automatics.
I hope that explains it sufficiantely......
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Joined: May 2005
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From: houston
ok. thats cool. now that i read the explanation i see it is a wot thud that will cause damage. helkl man first ford in 20 years so i am still learning them. thanks a bunch yall.
Last edited by ONE04FX4; Jul 25, 2005 at 10:56 PM.
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From: Virginia
Exactly, and we don't allow those 3-4 "WOT thuds" as you call them - we reduce power during a full-throttle 3-4 upshift as well as make them happen at significantly lower rpm than we allow in 1-2 & 2-3 WOT upshifts.
a 1-2 & 2-3 WOT upshift you can bang pretty hard if it's done right, and won't hurt anything - it's really the 3-4 & the 4-3 shifts that you have to watch out for, and on both of those we use q lot of torque management to reduce power and other aspects to protect that transmission, as it is a valid concern.
a 1-2 & 2-3 WOT upshift you can bang pretty hard if it's done right, and won't hurt anything - it's really the 3-4 & the 4-3 shifts that you have to watch out for, and on both of those we use q lot of torque management to reduce power and other aspects to protect that transmission, as it is a valid concern.