Originally Posted by fun2drive
Transmissions are too expensive to try alternative fluids when ZF transmissions are specifically designed for their fluid. As I posted earlier there is no alternative fluid for this 8 spd transmission. I did research on the most common 6 spd ZF transmission including oil analysis and discovered an alternative fluid that was also ZF approved.
My point to the original poster is that you are much better off paying for the correct fluid than experimenting on alternative fluids which
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I do agree with that I'm not a big fan of fit all trans fluids, I have seen first hand on a friends transmission that was ruined with fit all fluid. I get trying to find alternatives when the dealer wants $45 a quart for the repackaged LG 8 which is rediculous when buying 9 quarts of it. But now that the LG 8 can be had for $17 a quart the savings is not that grand or worth it on a fit all at $12 a quart.
Anyway you have a good deal of experience with these zf 8spd trans. What is your recommendation on an adequate driveway fluid level check/fill procedure? The service manual recommends an extensive fluid level check procedure that is not driveway friendly at all, involving jacking the 4 car wheels and and spinning the wheels through geras ect. What is an acceptably diveway fluid level check procedure on the 8HP70?
Was just looking at the 2016 ZF data sheets on the ZF 8HP70 and for normal driving they are saying maintenance free and for severe service they are recommending a fluid change at 50,000-75,000 miles. I have a ways to go before reaching the severe service change numbers but still would like to understand an acceptable driveway fluid level check/fill procedure. I have dropped many trans pans just never any ZF so these ones are a little new to me. thanks for any info