i can't seem to find info on how to identify my rear iff.

[Guest cw280z]

it's an r-2oo from an 82 2+2 and it is stamped 471....

can anyone tell me where to find this info? i've seen it before,but i can't remember where..

thanks

[j260z]

remove the rear cover and look for the numbers stamped on the ring gear. divide the larger number by the smaller number and you will get the ratio.eg 37:10 would be a 3.7 and 39:11 would be a 3.54.

[CruxGNZ]

This will help you out in the future. Yours is either a 3.54 or a 3.90 IF that is the stock rear end.

 

240Z 70-73 MT (3.364) (R180)

240Z 70-73 MT 5spd. (3.900) (R180) -non U.S.

240Z 71-73 Auto (3.545) (R180)

 

260Z 74 MT 4 sp. 2+2 (3.36) (R200) Here's proof

260Z 74 MT (3.364) (R180)

260Z 74 Auto (3.545) (R180)

 

280Z 75-76 (3.545) (R200)

280Z 77-78 MT (3.545) (R200)

280Z 77-78 Auto (3.545) (R180)

 

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)

 

300ZX 84-86 MT & A/T (3.700) (R200)

300ZX 84-86 Turbo MT & A/T (3.54) (R200)

300ZX 87-89 MT & A/T (3.900) (R200)

300ZX 87-89 Turbo MT & A/T (3.70) (R200)

 

Note Turbo's:

1) After 4/87-89 only (3.70) Clutch type LSD

2) 88 All white SS used a (3.70) Viscous Coupling LSD

3) LSD units came with finned rear covers

 

Additional comments:

-Viscous coupling LSD requires special splined half shafts

-84 through 87 R200's can be used in earlier cars, but require modifications. They aren't direct bolt in swapable to 240/260/280/280ZX's

-84 through 89 R200's used a 12mm bolt in the ring gear. Earlier R200's used a 10mm bolt in the ring gear.

 

Side note:

-85 and 86 200SX Turbo has the (4.11) (R200)

 

REMEMBER that this is the way the cars came STOCK!

 

List was taken from Zhome and modified.

 

!M!

[Guest cw280z]

i will pull the cover and look,thanks for responding......

since both cars are 81-83 mt i guess it is the exact same rear end.

i will probablyuse the half shafts from the 2+2 though, because they are the cv type instead of u-joint like the ones on my 81 now.

thanks again.

[Guest 3154tm]

wish there was this much information about the various applications and ratios for the R230, especially in the Infinity. they came in the Q45 and maybe in the J30. the all seem to be vlsd with taller ratios than the Z version. 3.70 and 3.54? 1990 to 1998? some had traction control and some

didn't. wonder if they are all interchangeable? are critical external dimensions the same? the taller ratios might be nice for those of us with street cars.

frank