Installed new transmission and feels weak in drive

I brought this truck with a bad transmission. I just installed another transmission and it just feels like to me it's weak in D. If I put it in Low it will jerk your neck. If you take off in D and shift it to 2 really fast there is no difference in the feeling of take off power. To me it's feels like it's taking off in 2 when it's in D. On the flips side it may just be I haven't owned a auto before and it's just weak feeling. I can't feel it shift hardly it's just smooth I guess. At 50mph it's at 2,000rpm. I'm trying to figure out if I have a problem or not. I have drove it about 60 miles and shifts good no jerking or anything. Just weak start. I didn't know if the kickdown cable could cause that or not.
I appreciate everyone's input always!!

 

Look at your RPM vs Speed, that should tell you if it's in 1st or 2nd.

 

I'm not 100% sure about what you are meaning. In D it won't start pulling till you are up around 1500 to 2000rpm.

 

Have somebody else drive it and see what they think.

 

No just me.

 

from a dead stop in drive, if you stomp the gas pedal this truck should take off with good acceleration. Even driving down the freeway in O/D if you stomp the accelerator the truck should down shift and take off. Now don't get me wrong, it's not a corvette, but I think these 5VZ 3.4L engines have some very good performance for a 4x4 truck. If it doesn't then you have problems, Maybe the shift solenoids may need replacing. Just my 2 cents worth

 

From a dead stop it's slow take off, it will not spin the tire at all. Once you get going it will run. Even if you have to slow down and then speed up. But if you have to stop then take off its weak, till it catches up.

 

Take a video so we can see.

 

Mine will spin the tires with little effort, and the tires are quite new and mud terrains.

 

Wow I wish this one would ha, I just dropped the pan and pulled the solenoids. Only 1 of the 3 is clicking when I apply 12v to them. I think that's weird. But hopefully that will fix my issue!

 

Keep us posted and let us know

 

Will do, hoping to get 2 today.

 

I got all new solenoids today, I'll be installing them this evening. We will see if it fixes the issue.

 

fingers crossed, keep us posted.

 

I put all 3 new solenoids in and topped it off and it shifts like a brand new one.

 

Just for education I’m not up on this but I’m assuming first gear solenoid was bad and you were starting off in second gear each time?

BTW great thread!