727 OEM transmission dipstick

[wjpatton]

Can anyone tell me the correct part number for the auto trans dipstick for a 1990 D250? The dipstick that came with the truck when I bought it last year is part #4428477 and is 17.5" long below the rubber stopper. PO said to run it about 1 1/2 qts low so it wouldn't leak. The truck runs fine like that, but I have no way of knowing the status of the fluid unless I fill it up and let it leak down to the level that just barely shows on the stick. Any suggestions out there? I ran a longer, oil pan dipstick down the tube to measure, and the bottom of the stock transmission pan is approx. 2" below the bottom of the current transmission dipstick. Thanks in advance.

 

[Simplysmn]

The 518 auto should be the same dip stick as they are both a version of a 727let me check to see what I have a extra of .

 

[wjpatton]

Thanks a million! Please measure and let me know how long it is..

 

[kthaxton]

Why not fix the leak? Do you know where it is coming from?

 

[wjpatton]

Yep, I'm fixing the leak, it is from the linkage. Just not sure if I have the correct dipstick since the transmission works just fine with almost no fluid showing on the dipstick when checking the fluid when the engine is hot. Yes, I check with engine running trans in neutral. When cold, engine off, fluid shows well above the full mark.

 

[kthaxton]

I see, I misunderstood your question, I thought you wanted to find a longer dipstick so you could continue to monitor your fluid level while staying 1.5 quarts low.

 

[wjpatton]

Sorry for the confusion. I wanted to know if I had the correct dipstick, as I find it unusual for the transmission to function correctly with such a low reading on the dipstick. Thanks....