Sounds like you have a zf swap in your future Byron! Do it do it!!

 

I'd be interested in your JW if you decide to switch! Lol.

 

I was pulling a 23K trailer moving down to AZ and forgot to flip the switch off. Several miles later the trans started slipping. I think I was at exit zero!

 

Uh oh, really? What would cause it to slip if it was locked?

 

Are you turning off overdrive, or even shifting to 2? That will give you more engine braking with or without the torque converter being locked.

Don't lock or keep it locked below 1300 RPM. The pump doesn't have enough output to keep the clutch from slipping below 1300 RPM.

 

Maybe the disks in the trans, IDK. But my rpm's were fluculating and it was getting hot. Let it cool and the trans was good after that. All I can say is ask John, I have a feeling he wouldn't like it! But of course, IDK!

 

I just saw your post Mark, I was probably 2,000 rpm.


Edit: this wasn't my John Woods trans, I was working it really hard with that load.

 

I drive down a gradual hill every day and it's not steep enough to be a braking problem so I just keep the transmission in drive without turning off overdrive. I just mentioned about the torque converter unlocking when I tap the brakes because I thought it was interesting.

Yes, when I need more engine braking on steep hills I turn off overdrive and shift to second and if it's really steep I shift to 4WD Low.

That's good to know. Thanks

 

I put a switch on my torque convertor lockup when I put a switch on my EBPV. I don't need them or use them unless I'm towing down a steep grade. My brakes thanked me for the help.


My MO for using them: when approaching a down grade, I disable OD to get into third. If that's not enough, I shift to second. If that's not enough, I flip the torque converter lockup switch. If that's not enough, I engage the EBPV. If that's not enough, I shift to first. If that's not enough, I use the brakes. If that's not enough, I look for the truck emergency stop exits. If that's not enough, well, I'll just need to improvise cause that would be uncharted territory for me.

 

haha, why didn't you say that its time to bend over and kiss your a** good bye! LOL

 

If first gear, converter locked, EBPV closed, and the brakes aren't enough, you've driven off a cliff!

 

My thoughts exactly

 

Interesting. Is this why on my 96 I have to tap the brakes to get the TC to unlock, but on my 97 I just have to left off the throttle?


Question 2, If you are using the TC-lock switch for extra braking and you need to downshift, should the TC be unlocked before shifting? OR can you just leave it locked in?

 

I have this same question Phil. Poor Mark with all us newbie kooks on the E4OD

 

Yes it is.
You can leave it locked. It will be smoother if you unlock it.