TC lockup switch
 

ok, so lets sayi want to do a TC lockup switch. what do i need, how do i do it, and is it fairly easy. thanks for the help :U:

This is a fairly easy thing to do but not really smart unless you use it smart. you will need about 10 feet of 16-18 gauge wire, a two prong toggle switch , and a sure splice wire conector. OK here goes on the ps fire wall you will see a computer with three plugs. find the center plug then locate the orange wire with a black stripe this is the wire you will be splicing into DO NOT CUT IT just splice into it. then run the wire from it into the cab in a very operatable area. put the switch in this area where you can use it easily then run another wire from the switch to ground and you are ready to go. remember not to use it below around thirty untill you figure it out. the truck will upshift with the switch on but will not down shift. should work after truck shifts to second gear. THIS MOD IS NOT ADVISED do not abuse this mod or you will tear up your torq converter:argh:

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have any questions just ask

well i got it done today. it works great. i didnt think it would be something that simple. i really appreciate the help. and im not going to abuse it. i cant afford to put any more money into the tranny right now. but when the time comes. if i were to put in a fancy high output TC does the switch still work with that or what happens then, just wondering for down the road. :U:

How do you work the switch? I understand the install but sice its cheap and easy I was thinking about doing it just to have another bomb for now.
My trans is stock so should I just say no? I dont wanna abuse it just every once in a while show off a bomb.
Thanks

i havent had any problems with mine, you just flip it on after you get up to about 35. it locks the TC and will let ya shift up, but not down, its pretty damn convienient in my opinion.

How often do you use it and is there any bad things that can happen?
I wanna try it for the MPG and just to have since its cheap.
Probably will do it.
Did you throw any codes?
Thanks!!

so how did you hook yours up? how riggle21 said or how the diagram showed? in the diagram it tells you to run a jumper wire in the main computer box...did u do that? and does the tc switch work well? im gonna be hauling a 10,000 lbs trailer from texas to illinois on thursday and may need this nifty switch. thanks :5:

the jumper wire keeps it from throwing a code

ya, i ran the jumper,i did everything it said to do. i ran a switch to the dash, one side to the ground, and the other to the black and oragne striped wire i think it was, but anyways, ya get goin about 35 or so and flip it on if your gonna be goin down the highway. in town go between stop lights you might forget its on and youll know pretty quick you left it on. but i have had no problems at all, the tranny is completely stock, i wouldnt suggest using while towing up hill, thats just my opinion, but other than that, its great. :U:

You don't have to do that to prevent a code if you use a resistor in the ground wire from the switch to ground. I use a 33 ohm Radio Shack resistor # 271-1104 @ 5 for a buck.

RR

Thanks for that part number RR, there is know way I would be able to have found that.
Probably going to do the resistor.
And thank you psy_6att_6ica_6, I'm going to get workin on this today I think.

Your more than welcome. And in case you think I'm real smart because I can give that # and know how to do this, I'm not. Someone else way smarter figured it out. I'm just really good at using what others have learned. :rocking: :pals: :ok1: :w2:

RR

So I went to radioshack today and found ones it but it had the diodes with hard wire, would I solder that in?
Or does this pn. have wire?
Kinda confused now...

Yes, you just solder it into the ground wire. I can't remember if these need to go a certain way or not. You should probably check with the guys @ Radio Shack. They will know.

Ok awesome, Thanks again for the help RR! :U:
Got eveything but the resistor so tommorrow I'll get'r done and hopefully post some pics of my switch location and all.

OK. so i just got mine done as well. BUT. when i hit the switch it locks up and then after about 3 seconds (not going hard on the pedal or anything) it unlocks and proceeds to get stuck in the gear i originally locked the TC from (3rd). So i then have to turn the truck off and turn it back on to get it to downshift... or start over basically. Otherwise it ends up getting stuck in 3rd gear. no matter if i keep going or slow down... any of this make sense? let me know if any of you might know why this is happening. hopefully i explained it well enough!!:humm:

i dont know what to tell ya. mabey you need to go back through and double check everything you did. i dont know if you did this resistor thing or the jumper wire. i did the jumper, bought a good switch, and made sure i had a good ground. other than go back through it, mabey your TC is worn out, i dont know. i just had my tranny rebuilt last fall, so everything is still new on mine. i dont know, i hope mabey something in that helped.

Does it work normally with the switch off and did it work normal before the switch installation? Did you pull the relay and if not did you install the resistor?

RR

well it does work normal with the switch hooked up and in the "off" position. and it did work normal before the install. everything worked as should. ummm i finally pulled the relay today after using the truck while it was in the first 3 times... but today got the same results as before with the relay out and just the bridge wire in there... and i didnt do the resistor

Wow i have a STUPID newbie question... What is the point of locking up the TC manually? Why doesn't it lock it up so soon from the factory??


FYI yes a diode does go a certain way. Putting it in the wrong way shouldnt hurt anything, it just wont work. A diode is like an electrical check valve... Only allows for the flow in one direction. A series of diodes can be used to turn ac into dc :U:

only reason i wanted to be able to do it early is because it gets to the higher gear quicker and thus going faster sooner. haha if that makes sense. im sure someone can explain that a lot better than i did. but yea when i step on it sometimes going through the gears takes longer and doing this would allow me to get to overdrive NOW. cuz man when that torque converter locks up the Adrenaline really starts pushing fuel....!!

Well, then that seems to point at something wrong with your installation. Did you get the correct wire? If you don't jump the relay or use the resistor the trans will got into limp mode with 2nd or 3rd gear starts.

To answer the other posters question, the locked converter will put the power to the wheels instead of slipping the converter. It appears to have increased my fuel mileage during in town driving. I lock it right away and the tranny stacks the shifts so I am in 3rd gear very early.

I have hooked up many of these lock-up switches the way I stated and never threw any codes! As far as pulling I hauled alot of thing uphill with it including a load of logs that grossed 40,000lbs just don't let it get under around 1500-1700 depending on your gear ratio!!

I don;t mind lockup switches, they create tons of trans business for me!

But they need to be used right, otherwise you will and up killing a stock trans.

As far as forced upshifts, that is going to happen. Light throttle the trans is trying to get into it's highest gear.

Dave