A manual swap is not for everybody, or we would all have manuals wouldn't we?

I think the OP wants a fix for his auto. Suggesting a manual swap is like killing a wasp with a flamethrower.

 

You got it head. I used to be always ragging on my auto, and wanted a manual. but you know what the trans itself has never let me down. I am going to keep the 518 what adjustment do i need to make though. i will check my TPS, but i never have problems unloaded. I used to have tps bugs but fixed them with some simple contact jelly.

 

NV5600....just rebuilt my 518....my truck has had a lot of other issues which normally end up being old, crappy wiring, and when I can finally get the actual issue pin pointed, it works great, tows at 70+....the problem is I still just polished a turd.(518) I know for a fact if I could do it over again, and if I towed stuff for a living, I wouldn't skimp. And why go NV 4500 when you could put a NV 5600.....just saying.

 

You have the converter but do you have a 3200 gov spring? You may be able to turn your throttle limit screw out first to see if this help. Try and adjust your tps 10mm wrench give it a samll twist in either direction and test drive. I bet an extra 50HP would really help you in your quest and not break the bank.

 

hey-Hey!!!,
Looks like TPS from over here. let me suggest the pot instead of something connected to the pedal. adjust as required for desired performance.
cheers,
Douglas

 

don't let BC847 read that

The 5600 is an overpriced pig, that's why Seriously, it's hard to find parts for (made of unobtanium, apparently) and when you do find parts, they are invariably the special gold-lined unobtanium parts. I think a fella would be money ahead investing in a 4500 and g/v unit. Now you've got two units that are readily available in the event of failure. JMO. Oh, this thread is about an auto...end of derail

 

grossing 14k i tow in overdrive at 70 with ease with my 90 except on the steepest hills and it has a 307 axle.

 

This is all if I lived in a perfect world and had all this extra gold you speak of lying around...
But as I stated, I can tow at 70+ no problem with my rebuilt 518, so I can't complain....I would do as mentioned above above above, tweak the pump, find a fuel pin that will fit your needs, etc, etc etc...best of luck.

 

since you want to keep the 518, start with the pot fix in lieu of the factory tps - less than $10.- in parts, check the sticky - and the 366 gov. spring - another $20.- or so. In the end you spend $30.- on a common, road-proven upgrade and if it doesn't suit your needs, it's easy to get back to your baseline.
What kind of TC did you get that seems to get you this lousy performance? Was it installed by a transmission specialist? If so, did you address the issue with the shop?

 

I recently cruised across I-80 through Wyoming towing a huge trailer loaded with lots of ammo, gun safes, musical instruments, amplifiers, my ridiculously nerdy amount of books and vinyl records, and tons of tools...in other words, I might as well have been towing a large UHaul stacked full of bags of cement...and kept up with the big rigs, with a Getrag G360.

If you have never been down that highway, um...you will get eaten alive doing under 70mph. Those big rigs...and this is the main East-West Interstate so there are lots of 'em...push 90, sometimes more due to the lack of speed limit enforcement up there.

That grumpy old Getrag in my heap kept up with 'em. I hit 90mph or a little more at times, ran like a top. Filled with RP Synchromax. It was very scary thinking about that heavy trailer back there, sure, but I made it.

Another vote for a G360 here.

 

unless the sprag in the stator of the torgue converter is locked up there is nothing in the trans that will kill power at high speed. in 40 years of building autos i can only remember 3-4 times of that happening. the ONLY slippage in any auto is in the converter itself. if anything in the auto slips one will be dead in the water in a very few miles. i submit that most of the people putting down the auto have very little knowledge of how it works.

 

Allright, I am getting confused on all these pump mods. When I first got my CTD 9 years ago I had a cummins tech body turn up the idle, power, and fuel. we checked boost and i went from 18 to 23. He said that was all we could do unless i wanted to get a new wg turbo. I can see the point of the 3200 gov spring but isn't all the rest pointless until you add a new turbo. I think my issues lie in the TPS, converter, or the trans needs the line pressure and band adjustments. When towing in OD the truck will kick out at the slighest of hills and rpm changes.

 

You might look into threads where folks have replaced the TPS with a potentiometer. Basically you can dial in the kick down. Some people seem to like it.

Are you still seeing 23 psi? I can't remember if you said you had gauges or not. They do help with the ol' troubleshooting!

 

Click here read and adjust.. If this dont work go with the mod above all are talking about.

http://www.pdrdiesel.com/oldsite/Tech1GTPS.htm