i know im new to this site but i have a few questions i bought a 1979 ford f250 ranger 4x4 351m from a local farmer and me and my brother got it started so we decided to rebuild tranny and when we put it back in we tired to start it and nothing happened we bench tested the stater its good and when we try to spin the motor it seems like its locked up any help would be greatly appreciated

 

Double ck all your elec connections.

Take a breaker bar/socket and try to turn the moter over by hand at the harmonic balancer bolt. I doubt that moter has seized since you did the trans work.

Standard or manual trans?

If an auto, are you sure you got the trans torque converter bolts in correctly?

When trying to start it do you hear the starter clicking/engaging the flywheel?

Sounds like the trans work you all did might be the problem, maybe a reinstall issue?

Hope its a quick fix for you.

Welcome to FTE....

 

is it a manual or auto? If manual, did you replace the clutch and flywheel? Did you install the wrong bolts in the flywheel and perhaps they are catching on the block webbing?

 

its a auto c6 and i bought a new torque converter

 

how do you tell if the torque converter bolts are in right?, and yes we tried the breaker bar and a piece of pipe and yes the starter was engaging, we are thinking the same thing that we just put it in wrong but i wanted to start with the easy things first, and thanks again for all the help

 

If it ran before you rebuilt the trans it isn't the starter or the motor. If you are certain you have the torque converter seated all the way in the trans and the trans bolted up properly to the motor I would start to think real hard about what you did possibly wrong inside the trans when you rebuilt it.

 

thanks ranger429 and we are pulling it out tomorrow how does the torque converter have to be seated in i just want to make sure and would you have to line that up precisely with something?, and thanks again

 

I bet you index the torque converter incorrectly and pinched everything together once it bolted up. Pull the tranny back out and converter. The converter has two drive cut outs that engage with two dog ears on the pump. Look inside the front pump where the converter slides into and youll see what i mean. A flashlight helps since you have to look beyond the torque converter seal

 

My bet is the torque converter wasn't seated.
When you slip the torque converter on the shaft, it has to "seat" three times. It has to seat on the input shaft, the stator support and the oil pump drive.
Put a thin film of grease or oil on the oil pump drive, then slip the torque converter over the input shaft. Push in gently and spin it at the same time. You'll feel it "seat" or "click" three times as it lines up with the different shafts.

 

thanks yeah when we put the torque converter we only clicked in once thanks again it solved my issue and started right up after we made sure the torque converter clicked three times thanks again for all the help!!!