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4l80 and 3:73 gears= what RPM?

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Old 08-03-2009, 08:24 PM
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Default 4l80 and 3:73 gears= what RPM?

hay guys i got my 80 in and im running a 3:73 gear, when im on the interstate and running at 70 im cranking 2700rpm is that normal?
Old 08-03-2009, 08:45 PM
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Thats normal.
Old 08-03-2009, 11:53 PM
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well it sucks!! LOL i miss my 2:73s LOL
Old 08-04-2009, 12:05 AM
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60mph=2k..
Old 08-04-2009, 01:39 AM
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how nice, what would I be expecting from my 4.11 on my ls1 240SX? cause Im literarly fed up with the 4l60e, so I guess its time to go with the 4l80e! can someone link me to what I need for this swap?
Old 08-04-2009, 06:48 AM
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it depends on your rear tire size
i have 3.73's, 28" rear tire, with the converter locked, i run 60 mph @ 1900
as i remember, i think i was around 2400 @ 65-70, would have to take it back out and see, lol
that is with a corrected speedometer
Old 08-04-2009, 09:37 AM
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Yeah 26" tires with 3.73s is about 2700. I just switched to 3.00s with my 9".
Old 08-04-2009, 09:58 PM
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Wow thats what I got to look forward to when i get this 80 in.
Old 08-05-2009, 04:30 AM
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Yep that's normal. I have an 80 and 3.42s on the stock 245/50/16s. I run right around 2500rpms at 70mph. I plan on stepping up to 3.70s when I get a 9 inch.

BTW I don't miss my 2.73s at all. The 3.42s really helped out the DD aspect of my 3600 stall.
Old 08-05-2009, 12:02 PM
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LOL yeah i dont miss mine eather, i think that im going to look into a set of 28 in tall tires
Old 08-05-2009, 03:10 PM
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Yeah, it sucks I'm doing 25 at 70mph, but atleast the car accelerates like a bat out of hell
Old 08-07-2009, 08:31 AM
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yeah thats a plus!



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