What Ratios Were the Diff's in the '82 & '83 Five Speeds

[Guest TBroZ]

I've got someone selling a couple of R200 diffs from these cars, but he doesn't know which ratios they are. I definately want either a 3.7 or 3.9 rear for my 327 motor and T5 trans.

 

Thanks,

Terry

[fl327]

81-83 na 280zx 3.90r200

dont know about 3.7

[Guest greimann]

The 3.7 ratio was only offered in '79. For 80-83, The Non-turbo models had the 3.90. The Turbos had 3.54

[Heavy Z]

I've got a 3.7 on mine and it winds up fast - I'm in the process of buying a 3.36 R200 as this ratio is closer to the 3.08 that came stock in the T5 camaro. You can find 3.54's all day long, and they work pretty good too. IMO a 3.7 or bigger is too much for a lightweight Z, you'll be working the gears more than you think.

 

Heavy Z

[Guest TBroZ]

Thanks Heavy Z, you read my mind. I was just about to ask which ratio. I'll go with the 3.54.

 

Thanks,

T

[Heavy Z]

No problem, TBroZ. Also keep in mind that 3.54 R200's from turbo models have cv joints rather than ujoints.

 

Brett

[Guest TBroZ]

Okay great! What's a cv joint? What does that mean to me? I sent the guy the money via Western Union today...so I now own a Turbo R200.

 

I'm getting confused between cv joints, in relationship to the axles vs. the driveshaft. Someone please explain. Pretend I'm an idiot.

 

Terry

[Guest sb400z]

It means that if you want to use the CV's, you'll need to get some adapters. This is a good idea because they are stronger, from what I hear. But you can also get the rest of what you need from an older R200 if you choose to do so. Do a search in the Drivetrain section.

[80LS1T]

"CV" or "constant velocity"(sp?) joints serve the same purpose as the u-joint half shafts. Half shafts are the things that stick out the sides of the differental that turn the wheels. If you plan on running a high power Z then you got the right differental. However you will need to get stub axles, compangion flages, and the actual CV joints to complete the conversion. This conversion has been outlined many times in the drivetrain section. I dont know what rear end set up you have now but the half shafts probably will not work if they are not CV's, because the CV half shafts just "snap" into the R200 you have.

 

Guy

[Guest TBroZ]

So would the stub axles, compangion flages, and the actual CV joints come off any R200 rear end? In other words, the R200 that I'm getting the rear end from isn't pulled yet, so the complete rear drive assembly is more than likely intact. Should I just buy the parts listed above from the same car as well?

 

Terry

[Heavy Z]

A search will tell you all the stuff you'll need to get/do.

 

Good luck!

 

Heavy Z