Hey, dont mean to start a new topic, but I have a question in regards to how much oil is in my 6 speed currently without draining it all. 

Like how much oil can you put in from the fill hole on level ground? What about bolt at top of the pto?

 

Only asking because I had a shop( which does good work usually)  drain and fill it. I would've done it myself but time is something I dont have a lot of.

I bought the oil, 6 quarts redline, and when I got truck back, I had 2 quarts of oil still left. Was told it may have had left over oil still in? Sounded odd, but they said they would check it. Brought It back, and a mechanic i havent met there came in and got me to show me it was filled to top of fill hole. He was a ****** about it too, so I questioned him on how much oil these transmissions take and he said " I just fill it to the oil comes out the top, I dont know." Wow ok, so i informed him on how much they take from factory spec, because apparently I have a moron working on my truck, then asked him to over fill it, which he knew they sometimes do it on these trucks. (Again, i trust the head mechanic and they usually do a great job, but this guy was something else.)

Anyway, i have a quart and a quarter still left over, and my truck isnt shifting into 4th and 5th smoothly at all. It's colder here now, which usually makes 3rd harder to shift into, but never had this kinda trouble with those gears. I do shift pretty slow, so it's not how fast i shift either. I feel like he didnt add enough oil, so I was gonna take the shifter off and add it through the top, I just want to make sure I dont put too much in there, especially if there was a quart still left in the truck when they drained it.

 

Plan on putting in 6 quarts.  Is there a way to check how much is in there currently?

 

Dig deeper my friend you'll find that it is close to GL-4 but not making the grade because it just too thin.

1 minute ago, Mopar1973Man said:

Dig deeper my friend you'll find that it is close to GL-4 but not making the grade because it just too thin.

 

Close only works in horseshoes and hand grenades... It's not uncommon for fluid specs to be close, but not the same.. hence different specs. GL-4 fluids don't meet syncromesh, and syncromesh doesn't meet GL-4, it's not rocket science.. only different specs. The same company makes both transmissions, as well as many others, and they are the ones that call for different specs... is that just for fun? 

 

Not to mention that the GL-4 specification does not have a designated weight associated with it. There are many different weight GL-4's, kinda like CK oil. The weight is published with the oil/lube because the designation of GL-4 does not denote the weight, unlike syncromesh. 

 

This another one of those solutions to a problem that doesn't exist. 

 

Syncromesh is not a thin fluid, certainly not thin enough to cause a bunch of concern . This is not a case of the vehicle manufacturer ignoring the transmission manufacturers specifications, unlike the G56. 

 

The dealership putting ATF in the NV's is also not a valid argument, warranty is LONG gone and published fluid specs are still GL-4 and Syncromesh. Besides who takes a 14+ year old vehicle to the dealership anyhow 

1 hour ago, Alexio Auditore said:

I may just dump the 6 quarts I originally bought all into it,

You'll be just fine, if you take shifter off with fluid to bottom of fill hole, you can barely see it from the top. If you dump one more quart in you may be raising level by 1/8 to 1/4" it's a big tranny one qt over is fine in many opinions, but we all know opinions are like belly buttons everybody has one.  Unless it's a tranny of course. 

1 hour ago, Alexio Auditore said:

unless the mechanic just did a more crappy job than I thought and didnt drain it all out.

Unless he didn't change it at all, how do you know

2 hours ago, Dieselfuture said:

Unless he didn't change it at all, how do you know

When he took the plug out to show me he put enough fluid, it was clean. 

That's why I was kinda curious how much oil would go in these transmissions from the fill plug on level ground. Then I'll know exactly how much he put in. 

2 hours ago, Dieselfuture said:

but we all know opinions are like belly buttons everybody has one.  Unless it's a tranny of course. 

Lol I had to re-read that to get where you were coming from.