7AT reliability

ImportConvert · 05-23-2021, 05:42 PM

How reliable are these as you get up in miles? Are they known for any specific issues? How often should you drain/fill them, assuming not tracking the vehicle?

Zyonara91 · 05-24-2021, 03:11 PM

My rule of thumb is a Automatic drain and refill should be every 40,000 km or every three years, which ever comes first.

I have not heard many issues with the 7 speed auto for the 370z on this forum, nor do I look for them since I drive the manual version. Pretty reliable transmission from what I hear though.

SouthArk370Z · 05-24-2021, 04:44 PM

The 7AT is very reliable and can handle more HP than the stock engine puts out. Change the fluid every 40k-60k miles and it should last over 250k miles in a DD. YMMV

ImportConvert · 05-24-2021, 05:07 PM

Excellent. Thanks! Qx5p application

Tractionless · 05-26-2021, 08:26 PM

Use a cooler. The flex plate is weak and I've seen torque converter failures.

ImportConvert · 05-27-2021, 06:56 AM

Quote:

Originally Posted by Tractionless

Use a cooler. The flex plate is weak and I've seen torque converter failures.

I believe the qx50 comes with a cooler?

-ZS-Carpenter · 05-27-2021, 08:40 AM

Quote:

Originally Posted by ImportConvert

I believe the qx50 comes with a cooler?

It just uses the radiator to cool the fluid. He is talking about a cooler like an oil cooler mounted in front of the radiator. I don't think it needs one for normal DD purposes.

I have 135k on my awd G and the trans is still as good as the day I bought it. I did the first fluid change at 110k and will flush and fill every 40k. I do the transfer case at the same time too.

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ImportConvert · 05-27-2021, 09:32 AM

Quote:

Originally Posted by -ZS-Carpenter

It just uses the radiator to cool the fluid. He is talking about a cooler like an oil cooler mounted in front of the radiator. I don't think it needs one for normal DD purposes.

I have 135k on my awd G and the trans is still as good as the day I bought it. I did the first fluid change at 110k and will flush and fill every 40k. I do the transfer case at the same time too.

Sent from my SM-G965U using Tapatalk

Hows the rear diff bushing? Any leakage?

-ZS-Carpenter · 05-27-2021, 01:53 PM

Quote:

Originally Posted by ImportConvert

Hows the rear diff bushing? Any leakage?

Every single one made pops at some point. It's a matter of time if it not done already

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EZT · 05-27-2021, 08:28 PM

204k miles. Zero issues. I do a flush and fill every 50k. I’ve had a stillen cooler on for about 150k miles. Only weak point I’ve read is the flex plate, but that’s usually boost related.

Tractionless · 06-03-2021, 12:39 PM

Quote:

Originally Posted by EZT

204k miles. Zero issues. I do a flush and fill every 50k. I’ve had a stillen cooler on for about 150k miles. Only weak point I’ve read is the flex plate, but that’s usually boost related.

Did you piggyback the Stillen cooler with the OE unit built into the radiator?

I ask as I'm running air/oil only (OE bypassed) and with the temps I'm seeing the OE radiator unit would only be heating the transmission fluid if it were still in line.

05-23-2021, 05:42 PM	#1 (permalink)
ImportConvert A True Z Fanatic Join Date: Jun 2010 Location: SWMO Posts: 4,454 Drives: 2019 CX5 GT Reserve Rep Power: 7626	7AT reliability How reliable are these as you get up in miles? Are they known for any specific issues? How often should you drain/fill them, assuming not tracking the vehicle?

05-24-2021, 03:11 PM	#2 (permalink)
Zyonara91 Enthusiast Member Join Date: Jun 2016 Location: GTA Posts: 368 Drives: 2010-Red-6spd-S/T Rep Power: 15755	My rule of thumb is a Automatic drain and refill should be every 40,000 km or every three years, which ever comes first. I have not heard many issues with the 7 speed auto for the 370z on this forum, nor do I look for them since I drive the manual version. Pretty reliable transmission from what I hear though. __________________ 2FT3PDLZ

05-24-2021, 04:44 PM	#3 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	The 7AT is very reliable and can handle more HP than the stock engine puts out. Change the fluid every 40k-60k miles and it should last over 250k miles in a DD. YMMV -ZS-Carpenter likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

05-26-2021, 08:26 PM	#5 (permalink)
Tractionless A True Z Fanatic Join Date: Jan 2016 Location: Atlantic SE Posts: 1,247 Drives: '10 K23 ST 7AT Rep Power: 30525	Use a cooler. The flex plate is weak and I've seen torque converter failures. __________________ Toys Not Tots

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05-24-2021, 05:07 PM	#4 (permalink)
ImportConvert A True Z Fanatic Join Date: Jun 2010 Location: SWMO Posts: 4,454 Drives: 2019 CX5 GT Reserve Rep Power: 7626	Excellent. Thanks! Qx5p application

05-27-2021, 08:28 PM	#10 (permalink)
EZT Track Member Join Date: Mar 2011 Location: Gainesville Posts: 535 Drives: 09 370z Rep Power: 315	204k miles. Zero issues. I do a flush and fill every 50k. I’ve had a stillen cooler on for about 150k miles. Only weak point I’ve read is the flex plate, but that’s usually boost related.