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Towing in OD?

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Old Mar 9, 2018 | 09:06 AM
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Towing in OD?

I was wondering about my E40D, is there a torque converter lockup or should I tow my bass boat in D instead of OD?

Thanks
 
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Old Mar 9, 2018 | 10:50 AM
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Over drive is fine.
 
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Old Mar 9, 2018 | 11:07 AM
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Yes, there is a torque converter lockup. It can lock the converter in any forward gear if the conditions are right. The transmission was designed to tow in overdrive.
 
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Old Mar 9, 2018 | 07:07 PM
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But of you find the transmission is constantly hunting between D and OD then by all means lock out OD.
 
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Old Mar 9, 2018 | 07:54 PM
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X2 on Conanski's comment. If it's searching and changing between D and OD then you'd be best to stick to D.
 
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Old Mar 9, 2018 | 07:56 PM
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If your transmission is hunting for gears get it serviced.
 
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Old Mar 9, 2018 | 09:18 PM
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Originally Posted by mrollings53
If your transmission is hunting for gears get it serviced.
What would you service to fix this?
 
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Old Mar 9, 2018 | 09:29 PM
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Change fluid & filter. Have bands adjusted (?). And yes, if it hunts for gears, by all means, put the selector in Drive, not Overdrive.
 
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Old Mar 10, 2018 | 01:01 AM
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Originally Posted by Mark Kovalsky
What would you service to fix this?
Hell if I know, it isn't behavior I have ever experienced. I've had destroyed front seals leaking a pint every couple miles, shifts that took 10 seconds to complete, grinding after driving for an hour and a half, etc. All while weighing 10,000 lbs and towing a trailer, but once it was in gear it stayed there.
 
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Old Mar 10, 2018 | 03:23 AM
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These guys have it covered. If all of your switches and connections are good and your fluid and filter are clean you can tow in OD without problems. You can tow really big, heavy stuff in OD with an E4OD. A transmission cooler is good too.

Hunting for gears is more of a small engine, high gear ratio thing. With a 460 and 4.10 gears I have never had an issue with it. I do drop it out of OD to put it at the RPM for peak torque for big hills and heavy loads.

Keep an eye on your tires, brakes and wheel bearings. Check them for heat whenever you stop.

You should be able to tow your bass boat and a travel trailer at the same time.
 
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Old Mar 10, 2018 | 07:12 AM
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Originally Posted by mrollings53
Hell if I know, it isn't behavior I have ever experienced. I've had destroyed front seals leaking a pint every couple miles, shifts that took 10 seconds to complete, grinding after driving for an hour and a half, etc. All while weighing 10,000 lbs and towing a trailer, but once it was in gear it stayed there.
The "hunting" I've had with a loaded E4OD doesn't come from the trans, but from the terrain and the PCM, and mostly when using speed control. Start up a slight hill and the throttle opens, it gets to a point and the PCM unlocks the torque converter and drops it into 3rd, the truck goes like a raped ape and the PCM upshifts and re-locks the torque converter and the process starts over.

Two solutions for this are to take it out of OD (in 3rd gear the PCM never feels the need to unlock the converter and everything stays a lot smoother) or take off the speed control and let the vehicle speed drop a bit. But no trans servicing is going to help that.

Actually there is a third, and in the long run better solution, and that would be to fix the PCM programming so it didn't downshift when just unlocking the torque converter would be plenty to let the vehicle maintain speed. If I did a lot of towing in hills I'd have to do something like that. I hate automatic transmissions that shift when I don't want (or won't shift when I do want. But other than towing in slight hills my '97 doesn't **** me off, which makes it my second favorite vehicle with an automatic I've driven.
 
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Old Mar 10, 2018 | 11:00 PM
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My 460 truck doesnt down shift soon enough. Lugs for a while and I have to give it more throttle to make it shift. That or drop od. I was thinking it was a tps deal but don' really know. What is this tugger kit that I hear about?
 

Last edited by humphrey169; Mar 10, 2018 at 11:02 PM. Reason: Autocorrect messed up my dumb words.
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Old Mar 11, 2018 | 12:43 PM
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Originally Posted by phoskins
Change fluid & filter. Have bands adjusted (?). And yes, if it hunts for gears, by all means, put the selector in Drive, not Overdrive.
The E4OD is not like an AOD. The E4OD is electronically controlled, so all shifts are controlled by the computer. The transmission itself cannot "hunt", it also does not have any adjustable bands.

The E4OD is fine to tow in OD as long as the engine can carry the load and stay in one gear. It's okay if it needs to downshift once in a while to go up a large hill, but if it's constantly shifting in and out of OD like very minute or so, you should lock out OD.
 
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Old Mar 11, 2018 | 09:20 PM
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Originally Posted by phoskins
Have bands adjusted (?).
Bands? The E4OD has one band. It is only used when the shift handle is in the 2 position. And it is NOT adjustable.
 
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Old Mar 11, 2018 | 09:22 PM
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Originally Posted by humphrey169
My 460 truck doesnt down shift soon enough. Lugs for a while and I have to give it more throttle to make it shift. That or drop od. I was thinking it was a tps deal but don' really know. What is this tugger kit that I hear about?
The tugger kit can affect how firm or soft the shift is, but it cannot change WHEN it shifts. That's controlled by the computer.
 
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