[tjw253]

I have a 79 mt n/a 280zx and I understand that it has a 3.36 rear diff gear ratio. Will a R200 from an 81-83 ZX be a bolt on? Or will I need to modify my car? I want the 3.9 ratio, for better acceleration of course!

TJ

 

[silver77280z]

Get the 4.10 its a solid diff

 

[tjw253]

What year/car was the 4.10 in? And would it bolt in?

 

[K Simmons]

'85 20SX turbos had 4.11:1 R200s. I would guess that other years close to that also had them but am only sure about '85. Open diff by the way.

 

[silver77280z]

I had torsion do me up one. it bolted in like snap.its a 4.10 with lim. slip. Used the housing off a 83zx

 

[tjw253]

Do you know how much of a difference there would be in acceleration between the 3.90 and 4.10 gears (like how many tenths of a second difference there might be in the 1/4 mile)? I know the 4.10 would be the best, but R200's with 3.90's are plentiful and I think I could find a good one for a low price.

TJ

 

[1970_240z]

not a huge difference in the two diffs but the 4.10 will make a small difference. check out this page if you haven't already and visualize...

http://www.geocities.com/z_design_studio/transmission.html

i would look for a 4.11 and if you can't find one, just do the 3.90 and be happy.

 

[silver77280z]

i cant get that link to work . any tips?

 

[tjw253]

I copy and pasted it into my browser's address box, and it worked just fine. Maybe try refreshing it?