DIY: Transmission Oil Change

cossie1600 · 10-08-2011, 03:04 PM

Thanks for the write up. I did this at 13931 miles. Just a couple of note I want to add.

#1 My transmission hadt always been notchy since it was new, I was too cheap and lazy to do this job. When it was completed yesterday, the transmission felt so much smoother. I still get the occasional notch in second, but it was nowhere close to what it was. All the other gears felt smoother. If I were to do over, I would probably change it after a few months.

#2 My car has about 12 track days, 450 autox runs and some easy street miles, the fluid were completely black after 13931 miles.

#3 I used Amsoil 75W90 GL-4. Please make sure you use GL-4 as the brass in the transmission doesn't like GL-5 fluids. My car had 3 quart coming in, 3.5 went back in.

#4 I bought my fluid pump from Harbor Freight, it was like $6.99. The pump is excellent as it is fast and doesn't leak.

#5 The drainplug and fill plug are 9mm hex if i recall correctly, maybe 8mm, but i am pretty sure it is 9mm

Differential fluid tonight

spearfish25 · 10-08-2011, 04:23 PM

Quote:

Originally Posted by TongMan

OP please update first post with pics for easier viewing.

LOL. I'll get right on that

.

spearfish25 · 10-08-2011, 04:24 PM

Quote:

Originally Posted by cossie1600

Thanks for the write up. I did this at 13931 miles. Just a couple of note I want to add.

#1 My transmission hadt always been notchy since it was new, I was too cheap and lazy to do this job. When it was completed yesterday, the transmission felt so much smoother. I still get the occasional notch in second, but it was nowhere close to what it was. All the other gears felt smoother. If I were to do over, I would probably change it after a few months.

#2 My car has about 12 track days, 450 autox runs and some easy street miles, the fluid were completely black after 13931 miles.

#3 I used Amsoil 75W90 GL-4. Please make sure you use GL-4 as the brass in the transmission doesn't like GL-5 fluids. My car had 3 quart coming in, 3.5 went back in.

#4 I bought my fluid pump from Harbor Freight, it was like $6.99. The pump is excellent as it is fast and doesn't leak.

#5 The drainplug and fill plug are 9mm hex if i recall correctly, maybe 8mm, but i am pretty sure it is 9mm

Differential fluid tonight

Glad it worked out for you. If you think the tranny fluid looked bad, just wait til you see the diff fluid.

cossie1600 · 10-08-2011, 10:57 PM

about to go down and check it, need my wife to get into the garage and spot the car onto the ramps

cossie1600 · 10-08-2011, 11:55 PM

you are right, the diff is disgusting, I am uppering the change interval to every other oil change. It's actually quite a bit easier than the tranny

EVOnomore · 10-21-2011, 08:03 AM

Any picks of Tranny fill plug?

Dallaz · 11-07-2011, 03:22 PM

Great write up. I definitely need to do this, my shifts into first and second are always rough compared to our 3000gt and camaro in the lower gears. +1 rep for OP

Andyy · 01-29-2012, 12:59 PM

is it the same for the 7AT

dkmura · 01-30-2012, 10:38 AM

Quote:

Originally Posted by Andyy

is it the same for the 7AT

No, the auto is completely different and requires different fluid and procedures.

anthonyy · 02-17-2012, 10:38 PM

repped spearfish. thanks!

Eon777 · 04-01-2012, 11:38 AM

Hello, stupid question I guess but here it is. I put 3 quarts in but it didn't overflow. Is that enough oil for the M/T?

I have been driving it, seems fine, but I have to ask.. Thanks..

djpathfinder · 04-01-2012, 02:21 PM

Basically, just keep pumping until it starts to overflow, then you're good.

dkmura · 04-02-2012, 09:25 AM

Quote:

Originally Posted by Eon777

Hello, stupid question I guess but here it is. I put 3 quarts in but it didn't overflow. Is that enough oil for the M/T?

I have been driving it, seems fine, but I have to ask.. Thanks..

Was your Z raised on a level surface when you were draining and filling the tranny? I've filled and drained several Z trannys and they never take more than three quarts.

ZMan8 · 04-02-2012, 11:03 AM

I was also wondering if it's worth buying the 4th quart just in case, or have people been fine with buying 3?

anthonyy · 04-02-2012, 12:30 PM

I bought 4 just in case and ended up using only a little bit of the 4th.

11-07-2011, 03:22 PM	#67 (permalink)
Dallaz A True Z Fanatic Join Date: Jun 2011 Location: North Dallas Posts: 1,272 Drives: 09MontereyBlu370z6MT Rep Power: 16	Great write up. I definitely need to do this, my shifts into first and second are always rough compared to our 3000gt and camaro in the lower gears. +1 rep for OP __________________ AeroJacket Lip Kit \| GTR switch \| NISMO S-Knob \| Blacked-Out-EVERYTHING\| 5% Tint \| Carbon Fangs/Upper Trim \| VOSSEN CV3's \| Painted Headlights \| CF Diffuser

01-29-2012, 12:59 PM	#68 (permalink)
Andyy Base Member Join Date: Mar 2011 Location: Dallas Posts: 47 Drives: 2011-370z-Silver-7AT Rep Power: 14	transmission oil change 7AT is it the same for the 7AT

04-01-2012, 02:21 PM	#72 (permalink)
djpathfinder A True Z Fanatic Join Date: Mar 2010 Location: Edmonton, Canada Posts: 12,910 Drives: 2012 GT-R BE Rep Power: 733	Basically, just keep pumping until it starts to overflow, then you're good. __________________ 2012 GT-R Black Edition Jet Black 2010 370Z 40th Anniversary // SOLD

04-02-2012, 11:03 AM	#74 (permalink)
ZMan8 A True Z Fanatic Join Date: Oct 2011 Location: Chicago, IL Posts: 5,844 Drives: 10 370z 40th M6 Rep Power: 659	I was also wondering if it's worth buying the 4th quart just in case, or have people been fine with buying 3? __________________ 2010 370Z 40 Anniv., 6 MT \| Fast Intentions \| Swift Springs \| SPC \| Z1Motorsports \| JWM \| Redline Oils \| 35% Window Tint 2015 Mazda6 \| 370ZChicago: Chicago Area Cars & Coffee

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10-08-2011, 03:04 PM	#61 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	Thanks for the write up. I did this at 13931 miles. Just a couple of note I want to add. #1 My transmission hadt always been notchy since it was new, I was too cheap and lazy to do this job. When it was completed yesterday, the transmission felt so much smoother. I still get the occasional notch in second, but it was nowhere close to what it was. All the other gears felt smoother. If I were to do over, I would probably change it after a few months. #2 My car has about 12 track days, 450 autox runs and some easy street miles, the fluid were completely black after 13931 miles. #3 I used Amsoil 75W90 GL-4. Please make sure you use GL-4 as the brass in the transmission doesn't like GL-5 fluids. My car had 3 quart coming in, 3.5 went back in. #4 I bought my fluid pump from Harbor Freight, it was like $6.99. The pump is excellent as it is fast and doesn't leak. #5 The drainplug and fill plug are 9mm hex if i recall correctly, maybe 8mm, but i am pretty sure it is 9mm Differential fluid tonight

10-08-2011, 10:57 PM	#64 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	about to go down and check it, need my wife to get into the garage and spot the car onto the ramps

10-08-2011, 11:55 PM	#65 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	you are right, the diff is disgusting, I am uppering the change interval to every other oil change. It's actually quite a bit easier than the tranny

10-21-2011, 08:03 AM	#66 (permalink)
EVOnomore Enthusiast Member Join Date: May 2011 Location: CT USA Posts: 288 Drives: 2011,370Z,Sport,M6 Rep Power: 14	Any picks of Tranny fill plug?

02-17-2012, 10:38 PM	#70 (permalink)
anthonyy A True Z Fanatic Join Date: Apr 2011 Location: Los Gatos, CA Posts: 1,027 Drives: Lexus CT Rep Power: 16	repped spearfish. thanks!

04-01-2012, 11:38 AM	#71 (permalink)
Eon777 Base Member Join Date: Oct 2011 Location: Ontario Posts: 14 Drives: 370z Rep Power: 14	Hello, stupid question I guess but here it is. I put 3 quarts in but it didn't overflow. Is that enough oil for the M/T? I have been driving it, seems fine, but I have to ask.. Thanks..

04-02-2012, 12:30 PM	#75 (permalink)
anthonyy A True Z Fanatic Join Date: Apr 2011 Location: Los Gatos, CA Posts: 1,027 Drives: Lexus CT Rep Power: 16	I bought 4 just in case and ended up using only a little bit of the 4th.