Weird tranny problem 73 bronco

[jisaacs]

Hey guys I have a 73 bronco with a 302 v8 automatic transmission. The transmission just got rebuilt and it runs fine for about 10 minutes. After that it loses all forward gears but not reverse. Let sit for a few hours and it's fine for a few more minutes. Let me know what you think thanks.. I'm stumped.

 

[Skiddy]

sounds like it is low on fluid

 

[B RON CO]

Hi, bring it back to the tranny shop. They can test it right away. It could also be a loose filter or warped valve body. Good luck

 

[jisaacs]

I've dropped it 2 more times and took it and he says it looks good. He said it could be the filter is plugged up but wanted some advice cause I don't know how much he knows about old trucks.

 

[75MIKE]

Do you still have the factory deep sump pan on the c-4? A car pan with a Bronco filter do not work. Another life experience.

 

[yakelys69]

What state are you in? Maybe someone local can halp.

 

[B RON CO]

Hi, the tranny shop needs to check the fluid pressure. There is a testing port on the side of the tranny. Good luck

 

[ared77]

+1 on low fluid, I've had old Mustangs in the past that when ATF got low would still go in reverse.

All the other answers are right on also.

 

[jisaacs]

Dropped the tranny pan and found this!!!

Ok so I dropped the pann on my tranny to check my filter. And I found a spring with a cap on it in the bottom of my pann??????

 

[jisaacs]

Picture

 

[DirtDonk]

Sorry jissacs, you can't upload an image directly to your post until you become a contributor for 12 bucks a year.
Alternate methods are to use an online image hosting site like SuperMotors or the like, or e-mail them to one of us with the yellow "contributor" below their username, or you can even put them in your "garage" in your profile.

A little more work, but it's worth it.

In some cases, when you find a plastic cap at the bottom of the pan it's from the original (as in brand new from Ford) delivery when the dealer installs the dipstick tube, stick and oil and just pushes the dust cap into the pan. Where it sits for decades without doing any harm.
I'm not sure about the spring though, so it's worth showing the pic here for experts to view.

But that's only until the first time someone removes the pan. And you say someone just rebuilt this? If the pan has ever been off they should have removed that without a doubt.
And you say the guy says the filter might be clogged? With what, one might ask, immediately after a rebuild? Who rebuilt it? Did they send out for a rebuilt and your old one was a core? Give us some more details please.
Sounds like you're doing all the removal and re-installation while you take it in for them to do it on the bench?

Good luck.

Paul