How to calculate diff gear ratio's with cover off.
Posted 05 December 2005 - 07:45 PM
Now you can count the teeth on each or you should be able to find a number in the format for example 37:9 if you find this number it's a simple task of dividing the numbers by each other 37/9 = 4.11111111 or 4.11.
I hope this helps since I didn't know this till I read it on an item for sale on ebay.
Posted 07 December 2005 - 07:39 PM
39\9 = 3.9 which is now in my Zed = much better acceleration!
Posted 08 December 2005 - 06:32 AM
Posted 08 December 2005 - 08:16 AM
I'm pretty sure it was a series 1 280zx Manual because it still had the universal joints in the back.
I'd like to get a 3.9 or a 4.11 for my Z .
Posted 14 December 2005 - 04:57 PM
Hey Jimbo, I bought my Zed with that ratio R180 diff in it - no wonder it accelerated so slow...
Hey Lurch,,, How come you had a 3.54 diff?? did you do a auto to manual swap? I have not long done this & am looking for a 3.9 diff, so am interested in your post...Thanks....Jimbo....
My Zed IS a factory manual car, but it had been ?fiddled? with by a previous owner. So I have NFI why the 3.54 R180 was put in.
I removed the 3.9 R180 Diff from a C210 auto sedan ? it was a straight bolt in.
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