id like to put a new tc in i tow under 10000 more like 6000 and drive it every day my truck has 90000 miles on it i would like to improve mpg and drivebilety what tc works and is worth the money iv seen some go for some pretty hi bucks i dont want to spend a ton of money so i need a lil input on what works thanks

 

try www.nadp.ca.

 

If you do a TC only the chances for running into some troubles shortly after that are quite good- for simple reasons: Your tranny has 90 k miles, and you can assume that there are some small leaks in there. (worn seals etc)- now let's add a TC that gives you more torque at lower rpm on the tranny input shaft. This means that the oil pump in the tranny doesn't produce that much flow as before and due to the leak the oil pressure in the tranny gets lower. Let's combine this with a higher torque on the clutches (that are applied by oil pressure) and the risk of slippage is there.
So, IMO if you already pull it for the TC get an update kit or rebuild kit and make a real good tranny out of the old worn stocker. It will take some time and will cost some $$$ but it's well worth it IMO

Just my 2c (€ -cents )

AlpineRAM

 

My thoughts exactly Alpine! I went BD. It was $1100. I know!, costly but well worth it. Good to 450 hp I installed this after I rebuilt the tranny and BTW, did a torque lock too. This set up is awesome. Good shifts and NO SLIP. Lastly, put a switch in to lock it up. Trust me, it does lock!

 

well it looks like ill do a rebuild and tc after the first of the year thanks for your thoughts on this i have a leak in the trany cooling line i am fixing tonight it cracked right at the bend ill bend a new one and get it in

 

That is true- do a rebuild when you do the TC and VB. It will save you grief.

 

My experience is a liitle different. I've built thousands of transmissions and I disagree with Alpine. His statement doesn't make any sense to me. If the transmission is in good mechanical shape adding a converter will not hurt.

A lower stall speed converter reduces the heat gain and would be beneficial to the overall life of the transmission. I'm pretty sure the torque multiplication factor is the same between converters. (About 2.2 to 1).The transmission's oil pump can put out many times more volume and pressure the transmission needs. It's not the rpm but the throttle position that determines oil pressure. A shift kit or valve body will raise the pressure in the tranmission adding life to the clutches and bands. The trade off is firmer shifts. Many of us like the firmer shifts but designers like to think we want smoooooth shifts.

 

The word is "if" it's in good mechanical shape. And I'd like to add that it makes some sense if you look at the torque load placed on the tranny at rpm that are much lower than the stall point. If you compare the torque input at 1200 rpm between a stocker and a (for example) DTT converter the difference is enormous. As you said the throttle position is a very big factor, but with the characteristics of these diesels you have a lot of torque at low throttle % especially if you lug the engine.
If you add a VB or shift kit that raises the pressure it will be good IF all seals are good internally. (And will withstand the increased pressures)
My experience is that it usually pays off to do it right when you've got the tranny out already. (I don't have had thousands of them in my hands but still quite a few)

Just my 2c

AlpineRAM