What is a TV cable?
Where is it?
Whats it look like?
How do I adjust it?

my tranny won't shift from 1-2 unless I let off the accel first.
plus the TC slips all the time but thats another issue.

thanks!

 

Lance, The TV cable connects the trans pressure lever to the throttle.
Crawl under the truck and look at the linkage, the small lever up high on it is the TV lever.
Now go to the Cummins, the front left side is where the throttle linkage is. you will find several cables there , one goes to the foot peddle, one goes to the cruise control ( if you have that). and the third one is the trans.
When you find it and adjust it most prefer it to have 1/8 inch of travel left at full throttle. also it should move the trans lever as soon as the throttle is moved. Most important make sure it is smooth and does not drag or stick.
I think your trans is ready for a rebuild from what you say it is doing.

 

If it is hanging up, you have to adjust the line pressure, not the TV pressure. If you increase line pressure and keep TV pressure the same, your tranny will shift earlier. If you want to increase the line pressure, you need to drop the pan (it can't hurt to change the fluid, probably due anyway). On the driver side under the tranny there are 2 allen screws. The Line pressure is partially shrouded, you will need to grind down an allen wrench to get in there. You can't miss it as there are only 2 on that side. The TV screw is black with some blue loc-tite on it. The increased line pressure will help a bit with the slipping TC, it did with mine, but it isn't a fix, more of a band-aid. I went 6 turns on the line pressure and 3 on the TV. If I did it again, I would do only 2 on the TV to get it to shift earlier. Don't do the line pressure more than about 7 turns or you will start blowing by the seals and the pressure will just be lost in leakage.

hope that helps a bit, any more questions just ask

 

wow, that sounds good, so by turns you mean turning the allen 360 degrees right? and you are turning them in, as in tightening them? will this do anything for performance?

 

Yep, 360 degrees is one turn. The rule that I was told is 1 turn roughly equals 3 psi. This is "tightening" them in. It helped mine out, my TCC doesn't slip quite as bad. About all it helps is the converter, and help it to shift earlier. The way I look at it is it is more of a last resort for the converter. If you go 6 on LP and 3 on TV you should have the same shifting patterns. Any less on the TV will shift earlier, but remember that a little goes a long way!

 

I use RABBIT EARS they work prety good Im still looking for a CUMMINS brand----hints theirs one in ever crowd

 

what the heck are rabbit ears?

 

Common Lance, didn't your great, great Grandpa ever tell you a story about rabbit ears...

I heard they were just an urban legand though.

 

Great great Grandpa I still use them. We ain't got cable anywhere near us.

(Glad my English teacher did not hear that sentence)

On Topic, thanks for the info. Will be adjusting a buddys' TC tonight.

Ed

 

oh haha, I get it now, :TV cable-rabbit ears-stupid antennas... hahaha

 

I was wondering too... It's a good thing someone explained...

 

Just incase anyone is still wondering

 

To raise the line pressure, the correct bolt must be turned CCW.
To raise the light throttle shift point the correct bolt must be turned CW. This adjustment does not effect the shifts at other speeds.

 

I turned my LP in Clockwise, and the converter definitely held more. This is the advice I got from someone on the TDR and also another sight. The TV screw also did affect normal speed shifts, mine shifted a bit later. As he explained it to me (I called him up when I did it) it is a shuttle valve in there with line pressure pushing on one side and TV pressure on the other. And Line pressure must overcome TV pressure for the tranny to upshift. If it goes the other way around, it down shifts. It makes sense to me, and it also worked for me.

 

cool