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6l80vs4l65

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Old 01-14-2010, 11:59 AM
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Hi

what better the 6l80 or the 4l65 ?

I am asking because last night I was driving my g8 gt (it has a 6l80) and my friend with his g8 gt came he said he did a swap in his tranny from 6l80 to 4l65 I dont know why but when I raced him starting from 25mph to 800m he beat me about 3 cars (all cars are 100% stock ) in first gear we was together till I shifted to 2nd he started to open and beat the hell out of me till he reached 3 cars ahead why the hell is that I think the 6l80 is crap

thanks
Old 01-15-2010, 01:36 PM
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no one ......
Old 01-15-2010, 01:54 PM
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I believe you'll get an answer if you post this on the grrrr8 board. All I know
is that the stock tune isn't that good on the A6.
Old 01-15-2010, 07:28 PM
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Lots of factors to look at here. What had been done to his 4l65e? Torque management removed, higher stall converter, shifts timing tightened up and you would have had a hard time with a staying up with a stock 6l80. I don't think the 6l80 is junk but it is kinda fighting with one hand behind its back in stock tune.
Old 01-16-2010, 06:36 AM
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His 4l65 is 100% stock no tune no higher stall converter nothing
Old 01-16-2010, 02:00 PM
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it must be the difference in gearing, plus if he did do a conversion something was done. You can't just swap something over and it be perfectly fine with no work needed to be done. I don't know about the converter but I would imagine that would have to change also seeing as though the input shaft maybe different, I could be wrong but there is mostlikely something not said or missed in a conversion did take place. Google the gearing of both trans and from there you should be able to make a guess on how you should have ran. Plus you can factor in that some cars are just monsters from the factory.




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