7 Speed Auto Trans Fluid Change

jchammond

ok-completed transmission service...didn't mention to remove overfill plug first(in previous post) but i had mine already loose because i ck'd the fluid level with the car straight to see where it was before i started.....and it was about 1 pt. low.
When i drained trans while on ramps-5 1/2 qts. came out...good deal..so 5 1/2 went back in before 2nd drive.
parked the car level-so that i could acess both plugs and let cool.

Drained fluid a third time & about 3 1/2 qts. came out and fluid was looking good.
filled with 3 1/2 qts. & started engine...shift trans. through different gears & went underneath.
pan was still cool,so i knew fluid would ck. low.......allowed fluid to warm some & remove overfill & let excess come out till started to drip & installed & torqued plug.
trans temp was about 105*
car drives great & ended up putting in a pint more fluid than what came out.
will ck again at next oil change-but feels great/no problems with other fluid-just 50k miles on it & it looked like coffee.

JARblue

__________________

nis350

thanks for the write-up.

Have a question about fluid level.

Does it make a difference on the fluid level check with the engine running or not (in Park or Neutral)?

Has anyone heard of Liqui Moly Top Tec 1800 ATF or Eneos? I was told that both are good ATF (Matic-S) with Liqui being better (full synthetic).

Tractionless

Engine running and in park or neutral is fine.

Have you confirmed beyond word of mouth they are Matic-S compliant?

__________________
Toys Not Tots

nis350

Thanks for the info.

Yes, Matic-S is listed for both ATF. Heard the Liqui Moly is really good and it is very popular among European cars. I've used their motor oil for my M3 before. I did some research and found that many European cars use Japanese transmissions.

jchammond

If you’re using a different fluid than oem; I’d recommend to flush & ensure that you end up with what you switch over too
Wouldn’t trust mixing fluids in this pricey trans

__________________
MazWorx built long block | FI-TT-100 Stage 2.75 | IPT built 7A/T

http://www.the370z.com/members-370z-...s-musings.html

nis350

good suggestion. Thanks.

According to the fluid manufactures, it is fine to mix the 'matic-s compatible' fluid. I was told not to flush a high mileage transmission.

jchammond

Unsure who told you that; as it’s a hydraulic system & the fluid does break down...Some forum members remove the pan/clean while doing this process.
I’m not speaking of putting any kinda solution/cleaning stuff through it- just drain,fill,operate & repeat until fluid is nice & clean.
I’ve also heard the magnets in the pan will get pretty heavily covered.
It’s all about “PM” (preventive maintenance) & not thinking about having to purchase a $9,000.00 tranny
Or gamble on a re-Tran

__________________
MazWorx built long block | FI-TT-100 Stage 2.75 | IPT built 7A/T

http://www.the370z.com/members-370z-...s-musings.html