Throttle Valve Control Rod

[GaryOR]

Well. Disappointment again.

Reassembled. Everything looked good before the pan was put back on. Pan on. Proper fluid level. Nothing.

More testing confirmed that cannot manually turn back tires while in park but can in everything else.

Also, disconnected tranny cooler line. It was essentially dry. Thus, no fluid is circulating.

Local tranny business says that indicates something internal not working properly and will need a rebuild.

Before I finally bite the bullet, is there something else that I May be overlooking, or is the lack of fluid in the cooler line enough to say there is a pump or other internal problem?

 

[Scoutboy74]

If you're not getting any fluid to come out of an open cooling line with the engine running and trans in neutral, along with no motion, I'd have to concur that hydraulic fluid pressure is not building. I'm sorry you're having so much trouble. Its service time.

 

[Scooter]

Too bad. I been following this in hopes that it was an easy fix. At least it seems to have been a good learning experience. I'm currently in the middle of a tear down of my 727 auto. Mine had absolutely no forward gears what so ever. Even though reverse worked, I'm not about to drive around town backwards. The guts of my tf are currently spread out on my bench with some burnt non existent front clutches along with the lingering aroma of burnt fluid. I currently have a line on a replacement complete unit that just might get me on the road sooner. I'll find out more tomorrow.

 

[GaryOR]

if you're not getting any fluid to come out of an open cooling line with the engine running and trans in neutral, along with no motion, I'd have to concur that hydraulic fluid pressure is not building. I'm sorry you're having so much trouble. Its service time.

Is there something specific about neutral and fluid flow?

 

[Scoutboy74]

Sorry gary. This one slipped through the cracks. The short answer is no. My previous remark was misleading, although in your case I think I'd still be checking for fluid flow in both p and n just to say that I did it. When all is as it should be, the fluid pump is circulating atf through the system any time the engine is running, regardless of gear selector position. However, for a tf 727 with unmodified valve body, the fluid level inside the torque converter drains back into the fluid pan during engine idle in park. The thinking behind that was to reduce engine burden. That's why the level should only be checked in neutral, as the converter is being filled instead of drained in that spot, and you will get a true level on the dipstick.

 

[GaryOR]

Thanks. Did check in both p and n. No difference in level and still no luck.

Tranny being dropped next week.

More to come...

 

[Scoutboy74]

Alrighty then. Best hunch at this point based on what's been revealed thus far is the converter was not fully seated during a previous installation attempt, thus damaging the alignment tabs on the pump drive gear. That May be all that is wrong with the unit, but there could just as easily be additional issues. Variables suck. Hopefully whomever does the work will not only be thorough in their inspection, but also fair and judicious about only replacing items that truly need it. Good luck.