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?

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.

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

Excellent. Thanks! Qx5p application

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

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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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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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. :tiphat: