Can someone please tell me what the typical shift points are (in MPH) for a '93 12V with the automatic? I'm specifically trying to figure out at what MPH these trucks would normally shift from 1-2 and 2-3 under WOT.

Any help is much appreciated!

 

Ideally.....just before the inj pump defuels!

 

Forgive the newbie question (this is my first real diesel), but is the injection pump defueling similar to a rev-limiter on a gas motor? Is it there to protect the engine from over-revving?

Also, if anyone can tell me the approximate MPH this truck should shift from 1-2 and 2-3 under WOT it would really help me out.

Thanks!

 

Yes and Yes.

I would say depending on the torque converter, engine power, and the tv cable setting with 3.54 gears it would shift the 1-2 shift anywhere from 20-25mph. The 2-3 shift again depending upon the torque converter and its ability to put power to the ground, along with the previously mentioned variables, anywhere from 35-40mph.

 

Just go out, put it in first, floor it, and you will fill it defuel(like you liftted you foot halfway of the go peddle) if you keep you foot in it the truck may gain a fue more mph but it will stop there, no mater how long you hold it there!

Put it is 2nt and do it again, when you fill it defuel that's you best 2nt to 3d gear shift

Now the tuff part getting the tv cable adj just right so that it shifts that way!

 

I don't have a tach so guessing rpm is out of the guestion. As for what speed it shifts? I can't tell because the torque converter or the automatic is so sloppy. The engine starts to pull and the speed goes up but it seems like it don't run together.

 

You are asking a very open question there Jrussel. The shift points are pretty well set to what the person driving the truck likes. If you are pulling loads you want the shift points farther apart. If your are like me, and do nothing but put the go pedal to the floor at every stop sign, then you will probably play with the tv cable quite often to see what it will do. Right now I can light the rear tires up and go through three gears in about 50 feet. But if I am pulling a load, I will slide the cable to where it defuels before shifting. I dont think there is a set shift point because all of these transmissions are so differnt. so just play with the cable till you find a spot that you like. Have fun with it and let us know what you find.
Tim

 

Thanks for all the great input guys!

The reason I asked this question is because my truck seems very slow (even for a stock 12V) and I'm wondering if it's just normal or there is something wrong. The tranny shifts so smooth I can barely feel it go from 1-2 and 2-3. It also seems to be shifting early and doesn't want to kick down and downshift when I floor it while going slow.

What/where is this "TV cable" everyone is mentioning? Is there a previous post that explains how to adjust it?

Thanks!

 

throttle valve cable(tv cable) it is what the tranny usse to tell how hard you are pushing the go peddle by adj the cable to be longer or shorter you can make the tranny shift later or sooner........If you are trying to fill a much furmer shift it will req a lower stall converter and maybe a shift kit in the tranny
O and the cable that go's to the tranny from the throttle shaft on the pump is the one that you adj
sorry get ramboling some times and don't get to the question

 

Thanks man! I've also done some searching on the TV cable and now understand how to adjust it.

However, I think my truck has more of a problem with downshifting than upshifting. Does the TV cable affect downshifting at all? If not, are there any common reasons why my tranny might not downshift properly when going slow and mashing the pedal to the floor? Instead of downshifting it seems to just stay in 2nd or 3rd and build power very, very slowly (I assume this isn't very good for the motor at low RPM's?).

This site and all your guys help has made buying and owning my first Dodge CTD so much better! I can't thank you all enough!

 

Kinda sound normal but, The, not kicking dowm, meens that you need to tight'n the cable, the tanny dusn't now that you are at full throttle so it just work with the gear it's in!!

if adj the cable back an forward don't help then you will have to dig deeper!!!
Cant help you there

 

I got my 93 about teo months ago,The guy that I bought it from worked at a tranny shop,and had just rebuilt the tranny in my truck. He put some kind of kit in it and it shifts fast and hard,none of that sliding into gear when it shifts. At moderate throtle it goes 1-2 at around 25 mph,and 2-3 at around 35. As far as 3-0d it's when I hit the togel switch,it doesn't go through the ecm.I need to be careful when the roads are damp,when it shifts it trys to go sideways,if I'm geting on it a little to hard. As my cousin says the old 93 can be wicked,but it sure is fun to drive.

 

Ok, I've done some testing and adjusting of the TV cable and also removed the stock airbox and made a temporary open BHAF-style intake out of the stock filter. I cannot believe the difference in power and driveability that just the open-style air filter makes...can't wait to start on the real mods now!

After some tests I've found that my truck defuels in 1st at around 25mph and in 2nd at around 40-43mph. The problem is I've tightened up the TV cable quite a bit (it does still have room to go tighter though) and the 1-2 shift is much closer to 25mph but the 2-3 shift is still just under 35mph. It seems like I'm losing a lot of power (and driveability) by the tranny not holding that 2-3 shift just a little longer. I assume there is no way to adjust the 1-2 and 2-3 shifts individually? Anyone else come accross this problem and should I just keep playing with it (and go tighter) until it gets better?

Thanks!

EDIT: I should have mentioned that I did not get to the point where the tranny didn't shift and it defueled, so maybe I just need to keep going tighter?

 

Thanks Rustbucket!

Your shift points seem really close to mine now (only mine are under WOT). I noticed you mentioned "moderate throttle". Do you know what the 1-2 and 2-3 shifts are for your truck during WOT?

 

I haven't really paid much attention,at wot.,but I think it goes up another 5 to 10 mph,but like I said my tranny has been tweaked quite a bit,and the truck has the banks kit on it,so theres a lot of differance in performance.between it and a stock truck. My truck will run circles around my cousins stock 91.