To do 7A trans fluid change or not??

AstatenateZ · 04-19-2018, 02:25 PM

Quote:

Originally Posted by Tractionless

It's cake and if you're buddy is replacing just what comes out of the pan, he's doing you a disservice. I drain 5.5 qts out with car on stands in front and ground in the rear then you still have what's in the converter and valvebody. As JCHammond already said there's much more in the system that what is drained.

I followed the below theread, same sprayer, got a infrared temp. Gun from Harbor Freight for $20 and used Valv. Max Life without issue. Simply measure the trans temp. At the pan sump with the gun and at 104*'ish pull the full plug until fluid stops running out then replace. There's a standpipe at the hole so only the "overfill" is running out. If you want to go the extra mile pull the pan and clean the magnets off. Pan gaskets are available from whateverittakes.com. I did mine at 72k for the 1st time and it was nasty, did again 10k miles later and only drained the pan since it was like new. Proves JCHammonds technique gets all the bad fluid out.

Car shifts much smoother after the full flush and fill proving it's not a lifetime fill.

7 Speed Auto Trans Fluid Change

I appreciate the response. He said it’d be roughly 5-6 quarts and said he’d just charge me $50 plus fluids. But that he is doing a full flush with the machine at Nissan that pumps it all out and replaces with new fluids. As well as using the computer system to monitor levels and trans temp.. So I’m assuming if it’s more than 5-6 quarts. I’ll just pay the difference. All I know is it is $9.20 a qt (my cost) for fluid. I already have 2 quarts at home of S Matic. And if I have to buy say even 6-7 more. It’ll cost me $60-70 in fluid for 9 quarts total (which he said would be worse case of how much it would hold) . And I’d still only be out $120 max. So still cheaper than the $180-220 Nissan service dept quoted me. But he said he’d be doing a full flush. I was just saying 5 quarts cause he said best case it’d be 5-6 quarts but could take as much as 9-10 quarts. So I’ll be paying somewhere between $30-70 on fluid and $50 for his services. So $120 > $180

SG4247 · 04-23-2018, 10:24 AM

I just did my 7AT on 4/22/18.

Exactly 5 quarts drained out, looked like used motor oil.

It has been on the jack stands for two weeks without starting, so a lot of fluid drained out.

Car only has 33k miles.

Put back 5-1/4 quarts, once up to temp at 104F, about 1/4 of a quart came back out of the standoff pipe.

Not a hard DIY, plan to do this again in 10K miles.

AstatenateZ · 05-02-2018, 07:28 PM

Quote:

Originally Posted by SG4247

I just did my 7AT on 4/22/18.

Exactly 5 quarts drained out, looked like used motor oil.

It has been on the jack stands for two weeks without starting, so a lot of fluid drained out.

Car only has 33k miles.

Put back 5-1/4 quarts, once up to temp at 104F, about 1/4 of a quart came back out of the standoff pipe.

Not a hard DIY, plan to do this again in 10K miles.

Quote:

Originally Posted by Tractionless

It's cake and if you're buddy is replacing just what comes out of the pan, he's doing you a disservice. I drain 5.5 qts out with car on stands in front and ground in the rear then you still have what's in the converter and valvebody. As JCHammond already said there's much more in the system that what is drained.

I followed the below theread, same sprayer, got a infrared temp. Gun from Harbor Freight for $20 and used Valv. Max Life without issue. Simply measure the trans temp. At the pan sump with the gun and at 104*'ish pull the full plug until fluid stops running out then replace. There's a standpipe at the hole so only the "overfill" is running out. If you want to go the extra mile pull the pan and clean the magnets off. Pan gaskets are available from whateverittakes.com. I did mine at 72k for the 1st time and it was nasty, did again 10k miles later and only drained the pan since it was like new. Proves JCHammonds technique gets all the bad fluid out.

Car shifts much smoother after the full flush and fill proving it's not a lifetime fill.

7 Speed Auto Trans Fluid Change

Please give me some advice on my new post below, I am going to DIY this!!

DIY'ing 7A trans fluid, need advice!

I am going to attempt to DIY this as my dealership said they do not have the exchanger machine (so would be using a hand pump like me) and have not ever done a 7A (sketches me out) and it would also be my first time and lastly do not have the special tool themselves (the charge pipe) to properly fill the new fluid back in. So might as well do it myself. Pls give me some advice on my new post and let me know if my plan sounds good or not. TIA!!

04-23-2018, 10:24 AM	#17 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 724 Drives: 2010 touring Rep Power: 4486	I just did my 7AT on 4/22/18. Exactly 5 quarts drained out, looked like used motor oil. It has been on the jack stands for two weeks without starting, so a lot of fluid drained out. Car only has 33k miles. Put back 5-1/4 quarts, once up to temp at 104F, about 1/4 of a quart came back out of the standoff pipe. Not a hard DIY, plan to do this again in 10K miles. Memphis370Z and AstatenateZ like this.

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