What is the best fluid to use? I finally was able to get my fill plug loose. I pulled it out and lost at least 1-1 1/2 qts. Is it ok to over fill it by that much? Or just fill it to the plug hole? It doesnt look like ATF in it either. Trans shifts perfect and is quiet, Just want to keep it that way.
ZF Fluid ?
- Thread starter idipwr
- Start date
ATF is proper fluid. Most of us overfill to cut down on rollover noise after a smf swap.
IMHO,
If the unit is shifting fine and NOT showing signs or sounds of wear, DO NOT OVERFILL, these transmissions to the best of my inspections and knowledge DO NOT have a vent tube. Over filling can cause seals to blow due to pressure increases in the case when it warms up.
JM2CW
If anyone knows where the damn VENT tube is OR where one can be added safely LET ME KNOW I don't like my transmission sealed like this just for this reason!
Al
Mine has a vent looking thing right on top of the trans, just I front of the shifter. At least, I think that is what it is.
I used royal purple ATF in mine, 4 quarts to be exact. Poured it in through the shifter too, it just seemed easier that way.
I used royal purple ATF in mine, 4 quarts to be exact. Poured it in through the shifter too, it just seemed easier that way.
The shifter is the vent.....
Yes, I have already figured that out a long time ago, I'm still wanting a VENT tube run up to about where the Wiper motor is on my firewall area! That ought to be high enough for all my wheeling!
Just sayin...
You can see the vent hole here, right in front of where the shifter housing bolts on. I am fairly certain it is tapped 1/8" pipe.
You can see the other end of this hole here right between where the two shift rails ride.
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You can see the other end of this hole here right between where the two shift rails ride.
You must be registered for see images attach
jaluhn83
Full Access Member
At least on the s47 it's 1/8 NPT. Course, that's only going to help if your shift boot is completely intact. Both of mine are ripped so moving the vent really doesn't help much.
Course, if you're in water up to the top of the trans I hope the axles and t-case vents are also figured out and nothing else leaks.......
Course, if you're in water up to the top of the trans I hope the axles and t-case vents are also figured out and nothing else leaks.......
the shifter boot at the top of the trans is not watertight. hell, most of them by this age have desintergrated.
if I'm in water that deep with the truck, that's too deep. I don't care how heavy a truck is, if you are catching a cross-current in a creek that deep, you're getting swept away. BTDT.
if I'm in water that deep with the truck, that's too deep. I don't care how heavy a truck is, if you are catching a cross-current in a creek that deep, you're getting swept away. BTDT.
nice pic of a ZF6. how many gears did it lunch?
metalminded
Full Access Member
While we are on the subject... I just dumped what looked like 80/90 out of my transmission and replaced it with castrol transmax mercon V. Doesnt seem like there is any difference in shifting, I plan to use this fluid as a "flush" before I change it out for some good stuff. Not sure what that will be yet, still reading opinions. The transmission shifts ok with alittle catch going into 2nd and third here and there. My main concern is that it whines pretty good when under load. Off the pedal and it doesnt make noise, put load on and it screams like it has two teaspoons of fluid. I also just changed out the transfercase fluid for transmax without any observed changes.
6.9poweredscout
Bleeds IH red...
Sounds like you got some unhappy bearings
Have you seen this thread? http://www.oilburners.net/forums/showthread.php?62490-ZF5-(S5-47)-Transmission-RebuildWhat ZF6 has a SBF bellhousing bolt pattern? What ZF6 has the reverse lockout feature built into the shifter hole? Never seen a ZF6 with a case that small.
NO_SPRK
User & Abuser
What ZF6 has a SBF bellhousing bolt pattern? What ZF6 has the reverse lockout feature built into the shifter hole? Never seen a ZF6 with a case that small.
corvettes came with zf6s
