Tranny Wont Shift

[skokie]

Ok heres whats happenning. 68 1/2 ton with a 350 motor and 400 turbo tranny. The tranny will not shift out of 1st. To make it shift you have to take it out of drive put it in 2nd then back into drive and from then it will shift fine from there as long as you dont put it in park again. I have changed the fluid, metal vac lines and the rubber line that comes from the modulator. Is there anything else that I could look at it?

Thanks

[rickn]

replace mod. , maybe sticking

[ZOOMY]

Sounds to me like you have some foreign material in the valve body. It could be something as small as a piecde of lint from a shop rag. Drain the fluid, drop the pan, remove the valve body & soak it in lacquer thinner. Blow out all the passages & reinstall.

[skokie]

Rickn I forgot to mention that I did change out the mod.

[skokie]

ZOOMY What is a valve body. Still new to this fun stuff

Thanks

[rickn]

probably is something in v/b if mod is new, also make sure there is no leaks in vac line to mod, maybe new but could still be leaking a little

[MAC67]

ive seen new mods be bad , id do a filter change and flush it , make sure the valve body is good and clean

[72addict]

And it was the little plastic gear on the governor that broke. $8 at the local tranny shop for the part and it was back going. It is pretty easy to pull the cover off and check the governor, but it is a pain when the fluid runs out the hole. LOL

[sneakysnake]

I vote on the vac line, mine did the same thing it would shift if you held it to the floor, the vacuum line had cracked at the intake manafold

[skokie]

Ok I changed out the vac lines and the fitting that goes behind the carb. No joy. I am assumming this piece is next? Is this the governor?

Thanks

[skokie]

How hard is it to change out a governor?

[72addict]

That would be the governor cover. Just remove that cover and the governor will be able to be pulled out (with a slight twist) and inspected. Make sure your drain pan is handy, or do it in someone elses yard. LOL The governor has flyweights also that should move very freely. The plastic gear has been known to wear or break. post a pic of the governor and I'll inspect it for you.

[skokie]

Sounds good. I can do this tomorrow. How much fluid can I expect to come out from the governor?

[72addict]

It is a mess. I have syphoned out fluid out of the dipstick tube in the past. It seemed to work pretty good. I assume you do not have a drain plug in your pan?

[skokie]

Nope no drain plug. I am assumming that means all of it.

[72addict]

No, not the fluid that is in the pan. Just the fluid above the govenor hole. Aprx 2-3 quarts.

[skokie]

Ok cool. Then the little bucket will do If this and another modulaor swap dont fix it then I guess its time to bit the bullet $$ and go to the tranny man down the road. Once I get my hands on a new governor I will swap it out and let you know how it went.

[72addict]

that would be cheaper.

[skokie]

Ok I got the governor out and its in my hand. What am I looking for?

Thanks

[skokie]

TTT

[skokie]

Ok Governor replaced and I still have the same prob. Whats next?

[skokie]

Ok heres the latest. Its going to the shop on saturday. I wil post back once they tell me whats wrong.
Thanks for all of the help.

[72addict]

so what happened?

[skokie]

Unfortunately due to time constraints I have not had a chance since I originally posted to take it in. Two kids will do that to ya. But they are worth it. I am hoping to take it down the weekend of the 19th or the 26th unless something else comes up. I will post back once I have something.

Thanks