new gear in the rear = WHOA

[4381821]

Hello,

I had a u-joint go bad in the rear, so in the process of replacing all of them, I came across 2 ring & pinion sets (3.54 & 4.375) for an insanely cheap amount. (one was less than $10!)

I finally just got everything back together last night, w/ the 4.375, and took it for a spin. What a difference jumping from my 260z's stock 3.38 made!!! Staying with the r180 over the r200 option also saved me a ton of $$$, since there are none to be found in a junkyard within a 400mile radius, and I'd have to do alot of buying/shipping.

One question I do have is, when I had the car up on jack stands, it seemed that only one tire was spinning under load while the other kinda just hung out - not spinning as fast as the other. On the road, I don't feel anything wierd like this...so is this just something that happens with an open diff?

[sblake01]

...One question I do have is, when I had the car up on jack stands, it seemed that only one tire was spinning under load while the other kinda just hung out - not spinning as fast as the other. On the road, I don't feel anything wierd like this...so is this just something that happens with an open diff?

That's normal operation for a standard differential. Your speedo will be way off with the 4.375 until you change the speedo gear. Your rpm will also increase by about 29% at any given speed. Do you have a 5 speed?

[4381821]

I do have a ZX 5 speed in there, and I'm having a hard time locating that speedo gear. Apparently my nissan dealer can only find up to a 19 tooth, which in all fairness I understand since that was the highest they really came with.

anyone know of a place to get these? The 21 tooth gear that is.

[Fun_in_my_z]

where is a good place to gt the 4.375?

[sblake01]

I do have a ZX 5 speed in there, and I'm having a hard time locating that speedo gear. Apparently my nissan dealer can only find up to a 19 tooth, which in all fairness I understand since that was the highest they really came with.

anyone know of a place to get these? The 21 tooth gear that is.

Check into gears for the 620/720 pickups and 200SX/HLA10(late 510) 5 speeds. I'm sure that since they were 4 cyl they probably had gears in that range.

[4381821]

I thought the 720's may have had it, but the dealership was telling me those ones came in a sleeve of sorts, and had some funky setup that involved a bolt running through the side of them? they could only find a 20 then either...

but I'll check on those other models, thanks!

[sblake01]

Try this part number: 32703-86401

http://www.courtesyparts.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=CP&Product_Code=32703-86401

And you'll also need the sleeve: 32707-66300

http://www.courtesyparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=32707-66300&Category_Code=

Be advised that these are listed for the FS5C71B and FSC71B 5 spds. I think they'll work on the FS5W71B but someone chime in here please if they know different.

[4381821]

I emailed courtesy with the details of my setup and they said this:

"The highest tooth count we have is offered is 19, 18, 17, 16 no 21 though."

[sblake01]

Check here: http://www.nissanparts.cc/