I drained my AT tranny fluid last night and replaced with the recommended Matic-J...added 3.25 quarts, but I may be able to add more, even though the dipstick of a dipstick tells me that I'm already overfull!

The service manual is overtly vague on the topic, saying the cqpacity is 10 7/8 quarts and that typically you will add 30-50% of that on a drain n' fill. (3.625-5.4375 qts).

I'm on the bottom of the guestimation range. From other posts I've found, mechs have charged for 4 qts when doing the service. Should I add more til i start getting overfill? Or is being a little under ok (like engine oil)? Thanks.

I should have measured the amount of fluid drained, but the presence of the dipstick made me feel that it was unnecessary (big mistake...judging from the superb design of the engine oil dipstick, I shoulda known better). Also, I didn't notice any crap in the fluid as it drained--the color wasn't black and nasty either.

I also changed my rear diff fluid with redline 75w90, but likewise didn't find any noticeable amount of discoloration, shavings and other impurities that others had reported. My car has 12k miles...

 

You're far better of doing a complete drain and refill at a shop equipped to do so. They drain all the oil including the oil in the torque converter and lines.
Otherwise the old oil (about 7 quarts) contaminates the new oil.

You don't want to overfill the tranny fluid. You'd be better off being slightly low.

Check the level after complete engine warmup, but not after driving fast for any length of time, otherwise it's too hot and will give a false reading.
A level anywhere within the crosshatch area is ok. Make sure you are on level ground as with checking the engine oil.

The rear diff takes about 1.5 quarts (U.S.) to refill. After draining the old oil, any sludge and filings will collect around the magnet on the drain plug.

 

Thanks for the info. Yes, I was considering doing a full flush n' fill, but since I was already doing the diff fluid, I couldn't resist

I wanted to see how bad the tranny fluid looked--if it showed up really nasty, I woulda probably gone for a full flush n' fill afterwards, but as it looked reasonably good, there was no need...I just wanted to make sure I didn't screw things up even more by doing so. Thanks again.

btw. I did clean the magnet area, but there wasn't that much stuff...perhaps I was just expecting more.

 

Type J fluid costs $9.15 per qt. Gallon jugs not available (says dealer parts counter). Does this sound right?


Is this stuff synthetic??

 

Yeah, better to be a bit under then over. If your a lot over, the extra fluid can eventually bust the seals in your tranny and that would be uber expensive!

 

any got info on the differential oil chage

(2005 Coupe)

I see the drain plug, but damn if I can see where or how to refill ?

 

Fill plug is on the upper right side of the differential. At least it is on the '04.

 

I created the Manual Tranny and Diff Flush thread in the DIY but ever since the board move all the pics have been lost. Here is the pic of the two plugs on the diff.

 

I also changed my rear diff fluid with redline 75w90, but likewise didn't find any noticeable amount of discoloration, shavings and other impurities that others had reported. My car has 12k miles...[/QUOTE]

the main reason you didn't see any discoloration or deposits its because your oil was so new.

infiniti doesn't recommend changing fluids transmission and differentials until about 30K and that's if your car is a DD and you want the premium service for your car.
im not saying its not good to change it but at 12k it almost a waste of money unless your really beaten up on the car.

 

Do you really think that the dealers do a full flush and refill?

form what i've heard they only do a drain and refill. what i'm planning on doing is a drain which is about 3.5-4 qts and then disconnect the re-circulation line and drain another 3.5 qts. which is almost complete.

 

You guys need to follow the FSM for filling fluid. NO GUESSING! Matic-S is the new Matic-J. Still expensive.

EDIT: Jeez - you revived a 4 year old thread mawells787. Some dealers prefer a drain/fill. I changed my rear diff (VLSD) at 18k and had tons of sludge, by the way. Perphaps open diffs don't have that issue.

 

I have a 04' DG with 45K in AT.

Assuming I havent changed any fluids besides Oil Changes. Should I change my oils? Specifically which ones? Any help is appreciated on this 4yr old thread