E4od stock shift question
Thread Starter
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VT Chapter Ldr
Joined: Apr 2004
Posts: 96,130
Likes: 294
From: Orange, Vermont
E4od stock shift question
I think I may know the answer but, I just bought a 96 4x4 CC that has 189000 miles and to me it seems to shift a little funny. I have never driven/ridden in another 7.3L before but mine seems to shift quick from 3 to 4. Is this an indication of it going bad, if so any idea how bad or any band aid type things can can be done to extend life for awhile?
Thanks.
Thanks.
Elder User
Joined: May 2007
Posts: 999
Likes: 0
I think I may know the answer but, I just bought a 96 4x4 CC that has 189000 miles and to me it seems to shift a little funny. I have never driven/ridden in another 7.3L before but mine seems to shift quick from 3 to 4. Is this an indication of it going bad, if so any idea how bad or any band aid type things can can be done to extend life for awhile?
Thanks.
Thanks.
Posting Guru
Joined: Feb 2008
Posts: 1,526
Likes: 1
From: Grass Valley, CA
I assume you mean the last shift to OD gear? If so then just shift manually by using the OD button (assuming your 96 is like my 97). I think most stcok trannys shift too early causing friction by shifting at to low an rpm. By doing manually with the OD button mine shifts crisp almost all the time if I let the rpms get high enough.
My first transmission mod is going to be this . sounds good and the guru's seem to like it.
Thread Starter
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VT Chapter Ldr
Joined: Apr 2004
Posts: 96,130
Likes: 294
From: Orange, Vermont
Just normal acceleration, and actually when I do get on it somewhat.
Maybe I am off on my number of shifts count. Do the autos have 4 shift points including overdrive or 5 shift points including overdrive?
Feels like 1-2 ok, 2-3 seem ok, 3-4 seem quick and 4-od seem ok.
I kind of like the quicker shift because it feels like it pulls harder.
Maybe I am off on my number of shifts count. Do the autos have 4 shift points including overdrive or 5 shift points including overdrive?
Feels like 1-2 ok, 2-3 seem ok, 3-4 seem quick and 4-od seem ok.
I kind of like the quicker shift because it feels like it pulls harder.
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Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
What you really are getting is 1-2, 2-3, then the torque converter locks, then 3-4. Fourth gear *IS* overdrive.
The torque converter lockup is different than a shift, so it feels different. That's normal. It seems to pull harder once the converter locks because it does. Before the torque converter locks you are losing about 10% of your torque to slippage in the torque converter. That's also normal, that's how an automatic trans works.
The torque converter lockup is different than a shift, so it feels different. That's normal. It seems to pull harder once the converter locks because it does. Before the torque converter locks you are losing about 10% of your torque to slippage in the torque converter. That's also normal, that's how an automatic trans works.
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Thread Starter
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VT Chapter Ldr
Joined: Apr 2004
Posts: 96,130
Likes: 294
From: Orange, Vermont
So Mark, that quick shift is the torque converter locking up and that is normal? I have read that the diesel converters are different then the gas ones but on my 98 escort wagon I don't notice that type of action, I know they are pretty much as different vehicles as you can get.
Posting Guru
Joined: Feb 2008
Posts: 1,526
Likes: 1
From: Grass Valley, CA
Ah. that makes sense. it doesnt feel much different than a shift though, almost like it acts as another gear (like back on the topic we discussed of TC torque multiplication)
Fleet Mechanic
Joined: Aug 2007
Posts: 1,508
Likes: 2
From: The boonies by Dallas OR
Adding to Mark's comments:
You will notice a torque converter (TC) lockup at high throttle in second. So it's 1-2, TC lock, 2-3, 3-4 at high throttle. That's useful if you're pulling long hills in second - give it enough throttle to make sure the TC locks and the tranny will run cooler. One place where it will scare you is on steep roads where you can barely move. It will lock shortly after the 2nd shift, even if you're still moving slow. It hits pretty hard and I've had it pull the engine down to about 1500 RPM.
At each of the shifts after the TC locks up unlock the torque converter briefly, so those shifts are noticed as a bump-bump, rather than one smooth shift.
You will notice a torque converter (TC) lockup at high throttle in second. So it's 1-2, TC lock, 2-3, 3-4 at high throttle. That's useful if you're pulling long hills in second - give it enough throttle to make sure the TC locks and the tranny will run cooler. One place where it will scare you is on steep roads where you can barely move. It will lock shortly after the 2nd shift, even if you're still moving slow. It hits pretty hard and I've had it pull the engine down to about 1500 RPM.
At each of the shifts after the TC locks up unlock the torque converter briefly, so those shifts are noticed as a bump-bump, rather than one smooth shift.
Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
typicly the converter locks around 35 mph, but that is just avg under light, normal throttle. under wot it will lock long before 3rd gear. i do beleive it is locked before the 1-2 shift under wot.
yes the "quick shift" is normal, what you are describing sounds exactly like the tc locking up. aside from the converter, alot of e4od's i have driven seem to have an early 2-3 shift under wot accel. i dont know why this happens but it must be programming because i have seen most of them shift at the same points.
here is a quick video of my shift patterns from a stand still with the selector in "drive" allowing the truck to shift by itself. you can see the tc is locked at the 1-2 shift by the semi-soft shift display in the tach. (it is still hard enough to bark tires
) the 2-3 shift is way too early in my opinion
YouTube - shift kit full throttle
now the only difference in this video is this section of road is uphill and after the 1-2 shift i click OD off and pull the selector into "2" and choose the 2-3 and 3-4 shift point. doing this dropped 3 tenths off my 1/4 mile et's. and you can hear the difference in the motor.
YouTube - 0-100+ mph
yes the "quick shift" is normal, what you are describing sounds exactly like the tc locking up. aside from the converter, alot of e4od's i have driven seem to have an early 2-3 shift under wot accel. i dont know why this happens but it must be programming because i have seen most of them shift at the same points.
here is a quick video of my shift patterns from a stand still with the selector in "drive" allowing the truck to shift by itself. you can see the tc is locked at the 1-2 shift by the semi-soft shift display in the tach. (it is still hard enough to bark tires
) the 2-3 shift is way too early in my opinion YouTube - shift kit full throttle
now the only difference in this video is this section of road is uphill and after the 1-2 shift i click OD off and pull the selector into "2" and choose the 2-3 and 3-4 shift point. doing this dropped 3 tenths off my 1/4 mile et's. and you can hear the difference in the motor.
YouTube - 0-100+ mph
Posting Guru
Joined: Mar 2007
Posts: 1,842
Likes: 2
From: hillsborough nj
typicly the converter locks around 35 mph, but that is just avg under light, normal throttle. under wot it will lock long before 3rd gear. i do beleive it is locked before the 1-2 shift under wot.
yes the "quick shift" is normal, what you are describing sounds exactly like the tc locking up. aside from the converter, alot of e4od's i have driven seem to have an early 2-3 shift under wot accel. i dont know why this happens but it must be programming because i have seen most of them shift at the same points.
here is a quick video of my shift patterns from a stand still with the selector in "drive" allowing the truck to shift by itself. you can see the tc is locked at the 1-2 shift by the semi-soft shift display in the tach. (it is still hard enough to bark tires ) the 2-3 shift is way too early in my opinion
YouTube - shift kit full throttle
now the only difference in this video is this section of road is uphill and after the 1-2 shift i click OD off and pull the selector into "2" and choose the 2-3 and 3-4 shift point. doing this dropped 3 tenths off my 1/4 mile et's. and you can hear the difference in the motor.
YouTube - 0-100+ mph
yes the "quick shift" is normal, what you are describing sounds exactly like the tc locking up. aside from the converter, alot of e4od's i have driven seem to have an early 2-3 shift under wot accel. i dont know why this happens but it must be programming because i have seen most of them shift at the same points.
here is a quick video of my shift patterns from a stand still with the selector in "drive" allowing the truck to shift by itself. you can see the tc is locked at the 1-2 shift by the semi-soft shift display in the tach. (it is still hard enough to bark tires
) the 2-3 shift is way too early in my opinion YouTube - shift kit full throttle
now the only difference in this video is this section of road is uphill and after the 1-2 shift i click OD off and pull the selector into "2" and choose the 2-3 and 3-4 shift point. doing this dropped 3 tenths off my 1/4 mile et's. and you can hear the difference in the motor.
YouTube - 0-100+ mph