Join Date: Dec 2010
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
new to 7.3, trans torque conv. question
I bought my 03 7.3 about six months ago. ive put about 2500 miles on it since ive had it. this is my first diesel and the first vehicle where ive been very sensitive to how it shifts and accelerates. My mods are in my sig. My question is, when under normal acceleration, the speed will increase by my rpms will basically stay the same depending on my throttle input. Example, if i give it enough throttle to get to aprox 2000 rpms and keep my foot there, it will accelerate through the gears and basically just hover around 2000. Local people ive talked to with 7.3s and other diesels say that is normal. The torque converter can only transfer so much power when it is unlocked and it just is what it is. I am just so used to other vehicle that even when the torque converter is un locked, the rpms usually increase with the speed. Ive never had a vehicle with this much torque and power either though. If i hammer on the throttle, the rpms increase normal and obviously the speed increases. Its just weird to me at like one third throttle the rpms will just hang out within a couple rpms of each other while it shifts and gets up to speed. The trans was rebuilt 30K ago with a billet converter. It shifts good, drives good, and i dont really have any complaints, just kind of seeing if this is normal for a diesel, esp with the 4r100. I do love my truck and like i said, havent had any trans problems at all just am getting used to how much different the truck feels when the tc is unlocked compared to locked.
EDIT: my trans temps are never more than 150 either, even when it is 90 degrees out. That is based on the trans sender being in the designated location on the mag hytec pan.
Last edited by vdog0531; 07-10-2011 at 11:20 AM.