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Dear Z friends,I was thinking about swapping my rear end and putting a 280zx r 200 rear end in.Is it a direct swap and if it is not then what has to be changed,also what is the advantage of the 200 with a 5 speed.THANKS,ROBERT
 

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Well it depends. Do you currently have a R200 in the 280z or do you have the R180? Also you need to know what gear ratios are in the 280z vs the 280zx to know if there will be benefits. More than likely if the 280z rear end is stock it will be a 3.54 ratio while the 280zx will be a 3.9 ratio. Going from the 3.54 to a 3.9 will give you the feeling of faster acceleration but will actually only drop you by .1 secs or less in the 1/4 mile. At the same time gas mileage may become less due to the higher rpms at cruising. Also a lot has to do with which 5-speed you use. Are you goint to use the early 5-speed of the 280z or the late 5-speed of the 280zx? They are both slightly different and in different combinations with the rear end can make different set ups. We need more info as to what parts you have and what you are looking to gain. In general a 280z 5-speed with 3.9 makes for a slightly better acclerating car while a 280zx 5-speed with a 3.9 makes for still good accel, not as good as the previous set up, while retaining better cruising rpms for better gas mileage. Like I said tell us what parts you have and what you are looking to do and then we can help more. Until then do some searches on this site for tranny and diff information to learn how these work together. Good luck
 

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280Z 75-76 (3.545) (R200)
280Z 77-78 MT (3.545) (R200)
280Z 77-78 Auto (3.545) (R180)

you should have the R-200 in there already... It would be a direct swap, Only the gearing could be different. see below for applications...

280ZX 79 MT 4 sp. (3.364) (R180)
280ZX 79 MT 5 sp. (3.364) (R180)
280ZX 79 All Auto (3.545) (R180)
280ZX 79 MT 4 sp. 2+2 (3.364) (R200)
280ZX 79 MT 5 sp. 2+2 (3.700) (R200)
280ZX-GL 79 (3.700) (R200)

280ZX 80 MT (3.545) (R180)
280ZX 80 Auto Coupe/2+2 (3.545) (R180)
280ZX 80 MT 2+2 (3.900) (R200)
280ZX-GL 80 (3.900) (R200)

280ZX 81-83 Auto all (3.545) (R180)
280ZX 81-83 Turbo all (3.545) (R200)
280ZX 81-83 MT (3.900) (R200)

kudos to whom ever gave this chart to me about a year ago it has helped a ton.

Ray
 
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