S13 R180 into Z?

[thriller]

Pulled the diff cover off of my old S13 single spinner that's been under the house to calculate the ratio, turns out it's a 4.11. Nice. It's an R180 unit (I replaced with an R200 2-way LSD).

 

Would I be able to swap the internals with the 240Z diff unit (which is a 3.9?). Also, anyone with a 4.11 know what the revs are like on the freeway in 5th with the 71A box?

 

Cheers.

[d3c0y]

Do you mean swap the ring and pinion into the 3.9?

It's about 3k rpm depending on wheel/tyre combo.

[thriller]

Spot on. Do I need any fancy tools or is it a backyard jobby?

 

Thanks for the info RE rpm/speed too.

[1600dave]

S13 is a "short nose" style R180, 240Z is a "long nose" type. They use completely different length pinions, rendering the crownwheel / pinion unable to be interchanged.

 

If you want a 4.11 R180 to suit the zed, look under a Gazelle with IRS.

[thriller]

Bugger. Saw they were totally different lengths, don't really know jack about the insides. Was kinda hoping haha.

 

Not really too fussed about it, just thought that if I could, why not since it'd be free. Thanks for the help though!