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Gear ratio


84_red_Datsun

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Look under the  passenger side hood hinge, down on the inner fender for the engine tag that's riveted there. It's about the size of a credit card and has this information on it.

 

buF8TkE.jpg

 

Bottom line where it says TRANS/AXLE....... FS5W71B..... HF38

 

The 38 is the ratio and stands for 3.889.

35.... 3.545

37.... 3.70

41.... 4.11

 

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It's interesting how you can see what the trends are these days by what people are asking on forums. This gear ratio/diff question has come up a lot lately, which leads me to believe that there must be a new interest in 720 4x4s.

 

Maybe I should buy a bunch and get a head of the curve...

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Wow, did not see the 4x4 in the question.

 

Yes 4.11 for the '84 although the very earliest '84 model year ones had a 3.889 listed. These would have build dated in late '83.

 

20 hours ago, Stoffregen Motorsports said:

It's interesting how you can see what the trends are these days by what people are asking on forums. This gear ratio/diff question has come up a lot lately, which leads me to believe that there must be a new interest in 720 4x4s.

 

Maybe I should buy a bunch and get a head of the curve...

 

I too have noticed this trend.

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