Where did the tranny fluid go?

[philo_beddoe]

A few months back i did a tranny kit, and added new fluid of course, and after like 9 qts i finally got a normal reading. Anyway, just happen to check the other day and it looked a quart low! I have never seen one drop of the red stuff on the ground and there is no sign of leakage-like a trail of oil streaks going down the under carriage as if coming out while driving.

[SkinnyG]

Theoretically, some can get sucked through a torn modulator and ingested by the engine.

Also, some could get pumped into the radiator via a cracked internal cooler, but I think you'd notice other issues.

[blazer74]

Top it off a roll, keep an eye on it. Check your oil and rad for signs of trans fluid.
If it's a 4x4 it could migrate to the transfer case and eventually overfill.

[K20Detroit]

Did you check it under the same conditions? Fluid warm, in park, level ground, after cycling through all the gears?

[philo_beddoe]

i added a quart, will run and switch gears and post results, thanks.


Romans 8:2

[Captain Swampy]

I wouldn't worry unless it needs another quart shortly.

[werewolfx13]

fluid being drawn through the modulator is a very real possibility. One of the smaller trucks in my dad's tree service "fleet", a 73 f350 dump truck, trashed the valve seals and rings, and transmission, due to this problem over a prolonged period of time. Keep a close eye on it. If the fluid level continues to drop, be sure to check the vacuum line to the modulator for signs of fluid, or replace the modulator outright.