Fine tuning tv cable.

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Fine tuning tv cable.

Postby Sutter1stgen » Mon Oct 21, 2013 7:11 pm

Well I went to the track on Sunday, ran a 13.6@95. I knew I'd be trying to spool my s366 for some time at the start. So I zip tied my tv arm full back. Well this had me shifting 10mph too late on my 2-3 shift. So today I tried to slowly adjust my tv cable till it shifted around 55. Before I could ever get there I noticed the truck was not getting full fuel. So the tv cable was limiting my throttle travel.

What are some of the home made fixes you guys have come up with for this problem. I'd reall like to have the tv cable/setup work as intended.

Thanks.
Eric

91'w250 with a new pump. This one doesn't chase itself around in a circle.
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Re: Fine tuning tv cable.

Postby RCCUMMINS89 » Mon Oct 21, 2013 7:33 pm

That's an easy one............just do away with it :lol: .

That's what I did. :P
89 RC on shortened 92 diesel frame - NV4500 w/dual disc/4.10s on 37s. - Self built pump, "hot screw", lots of timing, True high volume low pressure lift pump, 62fmw/68/.7gated, 77lpm SAC Inj., Studs/O-rings,- 423/1220 Mustang - 11/16/2013 http://www.TheHungryDiesel.com full line dealer, if you don't see it please ask.
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Re: Fine tuning tv cable.

Postby Sutter1stgen » Mon Oct 21, 2013 7:44 pm

Not going to happen!!! Lol
Eric

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Re: Fine tuning tv cable.

Postby Remps » Tue Oct 22, 2013 6:55 pm

My tv cable is currently strapped about 1/3 of the way back on the 47rh, far as i can have it and keep upshiffts in drive under 2000 rpm. I am thinking of making slotted holes on the throttle linkage and the bellcrank for the throttle rod connecting balls to be adjustable and maybe be able to have throttle travel that i want and have the transmission work properly.
'90 D250 R/C,727,IC,6x.009's,1/8" bump,fuel psi,straight pipe w/5" stack.
'90 W250 R/C,47rh,K@N,HX35,1/8" bump,2nd gen IC,boost,egt,trans temp.3.07's.
'96 2500 S/C L/B,2wd,NV5600,3.54 L/S,cai,egt,pacbrake,mbrp exhaust,10 plate.
Bring back the Bank of Canada, PRE- 1974.
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Re: Fine tuning tv cable.

Postby Sutter1stgen » Tue Oct 22, 2013 8:17 pm

I actually took a die grinder to the holes in the throttle arm to change my throttle ratio. I made each one slotted. This helped fine tuning through all of my different setups. I crawled under the truck today to give it one more go, and found that the bracket on the side of the transmission twisted away from the tv arm. This allowed for the tv cable to bind before full throttle, & full tv travel were reached. I'm going to build a small bracket to help keep the factory bracket in it's correct location.

This small stuff can drive a guy insane.
Eric

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Re: Fine tuning tv cable.

Postby RCCUMMINS89 » Tue Oct 22, 2013 8:28 pm

Ya.......but it's all in the fun of the sport.
89 RC on shortened 92 diesel frame - NV4500 w/dual disc/4.10s on 37s. - Self built pump, "hot screw", lots of timing, True high volume low pressure lift pump, 62fmw/68/.7gated, 77lpm SAC Inj., Studs/O-rings,- 423/1220 Mustang - 11/16/2013 http://www.TheHungryDiesel.com full line dealer, if you don't see it please ask.
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Re: Fine tuning tv cable.

Postby Remps » Tue Oct 22, 2013 8:34 pm

Cool. Time for another pass down the quarter when you get er fixed!
'90 D250 R/C,727,IC,6x.009's,1/8" bump,fuel psi,straight pipe w/5" stack.
'90 W250 R/C,47rh,K@N,HX35,1/8" bump,2nd gen IC,boost,egt,trans temp.3.07's.
'96 2500 S/C L/B,2wd,NV5600,3.54 L/S,cai,egt,pacbrake,mbrp exhaust,10 plate.
Bring back the Bank of Canada, PRE- 1974.
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Re: Fine tuning tv cable.

Postby Remps » Tue Oct 22, 2013 8:40 pm

Any chance you could post a pic of your linkage setup? :grin:
'90 D250 R/C,727,IC,6x.009's,1/8" bump,fuel psi,straight pipe w/5" stack.
'90 W250 R/C,47rh,K@N,HX35,1/8" bump,2nd gen IC,boost,egt,trans temp.3.07's.
'96 2500 S/C L/B,2wd,NV5600,3.54 L/S,cai,egt,pacbrake,mbrp exhaust,10 plate.
Bring back the Bank of Canada, PRE- 1974.
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Re: Fine tuning tv cable.

Postby Sutter1stgen » Wed Oct 23, 2013 11:17 am

Which part? Of it. I'm going to be doing some tuning on it this weekend I'll try to then. I still can't get it to shift as late as it did zip tied, with the tv cable.
Eric

91'w250 with a new pump. This one doesn't chase itself around in a circle.
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Re: Fine tuning tv cable.

Postby Sutter1stgen » Fri Oct 25, 2013 11:42 am

Well I'm doing some digging and it appears there is multiple kick down levers. Some have the keyed notch directly in line with the arm, and some have the notch offset, as to give you more apply sooner. I'm talking about the are the is located on the transmission.
I pulled my tv arm off of my old 727 and found it to be the less apply of the two. That transmission shifted way late, and I wonder if it had the line pressure jacked way up on the valvebody. Well I'm going to pull my tv arm off of the A518 and see which one it has on it. If both of these arms are the same I'm going to modify one to give me a earlier apply.

One may even get a more complex modification.

Here's a pic I found on the web with the two arms being described as gas and diesel application.
The shorter offset arm being the diesel app
Image

And here is a pic of my a727 arm. As you can see it is longer, which would give it slower apply, and the keyed notch is directly inline with the arm. So hopefully I can figure out this early 2-3 shift.
Image
Eric

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Re: Fine tuning tv cable.

Postby cmann250 » Fri Oct 25, 2013 6:57 pm

I know the 47RH lever has a different angle to it that the 727 lever.
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Re: Fine tuning tv cable.

Postby Sutter1stgen » Fri Oct 25, 2013 8:24 pm

Right. And the more I dig the more I find, almost every application uses a different arm. I'm going to temporarily angle and shorten my a727 arm. And if it improves my wot 2-3 shift I'll leave it. If I need to modify it to a break-over design I can do that later.
If I can get the 2-3 shift to run out to 65 with a zip tie( which was about 5-10mph too late), then by gally it better with the tv cable.
Eric

91'w250 with a new pump. This one doesn't chase itself around in a circle.
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Re: Fine tuning tv cable.

Postby Sutter1stgen » Sun Oct 27, 2013 1:40 pm

Well guys I fiddled with the trans a bit today!! Talk about a stress relief. Im running a 5:1 apply lever, I installed it because it came with my trans kit from Patc. I didn't know it was taboo to run one in a diesel. :(

Well I heard suncoast runs them so I called them (very nice people, and informative) and they transfered me over to one of their transmission guys "Ernie". He asked how I set the trans up and came up with a quick solution, a second spring for the second gear servo. Well after about 3 hours of messing with that, I now have a crisp 2-3 shift to go along with my other crisp shifts.
Big thumbs up to Ernie.

Now I adjusted my line pressure regulator 3 partial turns out to increase my line pressure a smidge, to see if it would delay my shift any. Nope, not one mph.
So after so careful inspection I looked at the angle of the arm as it went through its throw. It appeared to be beyond perpendicular to the tv cable when it hit full travel. Now this would mean that the tv cable wouldn't have full leverage on the apply arm, and probably why I couldn't get the 3rd gear shift to hold out as long as it does zip tied.
So I modified the extra tv arm I had to help cure the problem.
Image
It helped a little bit and makes for a better shift placement. I can now how 3rd gear till about 50mph instead of 46-7ish.
Some of you are probably wondering what's wrong with that, but remember, I'm still running 3.07 gears, 55mph would be the sweet spot!!
Eric

91'w250 with a new pump. This one doesn't chase itself around in a circle.
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Re: Fine tuning tv cable.

Postby 1STGENFARMBOY » Tue Oct 29, 2013 9:12 am

I made this thing to fine tune the TV, it seem to work great and has been on for a couple years now.

only one con to it, it down shifts at the same speed it up shifts at on a normal peddle position.


for instance.....when you leave a stop it will shift into 2nd at 19 and 3rd at 35, then the same speed coming back down.

the reason for the long slot is the TV will take over on a WOT run and shift out at 35 and 55 respectively.

this adjustment seems to give the pressure time to build up and shift good and firm instead of sliiiiiiiding into the next gear.


Image

Image

Image




yes that's a hose off of a hay bine as a trans line.....it was temporary. :mrgreen:
93 W250 STD CAB, AUTO 3.55, GAUGES, 80HP DDP STICKS, DENNY T ,16CM HOUSING, 60MM GILLETT, VE MAXED,BHAF, BHFF, 366 SPRING,P/S INTERCOOLER, TIMS COOLER TUBS, TIMMING 1/8 BUMP,4in TURBO BACK TO DUEL 5IN STACKS,33 12.50 BFG, HOLLEY BLACK, CONVERTER COOMING.
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Re: Fine tuning tv cable.

Postby BC847 » Tue Oct 29, 2013 11:26 am

Ernie, has been VERY helpful to me. 8)
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