After plenty of searching I could not find a definite answer.

So I swapped a '10 g37 vlsd diff into my 08 350z(also vols.) and retained my original abs sensors. Took it out for a run and on the on-ramp with steady throttle going 15-20 mph, 2nd gear, probably 2k rpm the slip light stays on cutting off throttle.

I found that some people kept their original abs sensor while others swapped it out with the donor one. The g37 sensor has two separate independent connectors while the z sensor has two wires going into a single connector.

My questions are:
-By retaining the original sensors, is that the cause for the slip light?
-If I do have to swap out to the g37 sensors, do i have to splice the wires to fit the single connector?
-Will that solve the problem?

Before the swap I never had this problem, i still have the oem staggered, tires probably have about 8k on them, not under-inflated nor over. Just the slip light comes on, not the tcs nor abs. Would appreciate any kind of feedback.

 

I had a minor issue with the speedo reading about 4 mph too fast with the swap.

I would start by trying the other sensors to see if it fixes the issue.

What's your wheel and tire setup? If it's off from the factory setup by over 3% then on top with the diff readings might be the cause of your issue.

 

Thanks for the quick feedback!

Yeah I think i might splice the g37 wires into the single connector to see if that works.

So you had done the same setup? Did you keep ur original sensors or swapped them out?

I got stock 245 40 18 front and 265 35 19 in the rear.

 

I would not swap sensors or splice wires, it's not the problem.

Speedo will read the same, RPMs should be slightly higher, that's it , at least on the older DE cars. Speed comes off the Rt wheel speed sensor so it doesn't matter how much the driveshaft spins. Tire height is the only thing that effects MPH, and I doubt the HR cars have anything in the electronics that link speed and RPM to cause problems with the gear swap.

I would look at other gearing swap threads, no one else has had this problem.

 

Yeah i looked into maybe all the gear swaps around the forums but cant find nothing. Im not too worried about the speedo at all right now but just the slip light on very light turns. On those swap threads, people do mention they swapped out the sensors, but how if its different connectors? While others said they just kept their old sensors without any problems.

 

This might be the problem i just noticed. So here is the diff axle from the g37, notice the width of the gear teeth. The count is 48.



Below is the diff axle from my 350, notice the gear teeth is more thin and spaced differently. The count on the gear teeth is 46.



here is just a picture for reference on the 350z and g37 abs sensors. how they have different plugs.



So in my theory, a g37 diff swap into the 350z is NOT as simple nor compatible as just bolting it on. UNLESS, swapping the abs sensors, which requires it to be spliced, makes the difference. Any suggestions?

 

You need to swap the stub axles, simple and easy. The sensors will just pickup what the relucter (teeth) tell them. The G37 also runs a square tire combo, I bet that's how they changed the programming vs a rewrite from the previous.


I want G37 stubs now, I bet I can run a square tire combo with not AbS issues with it. 2 less teeth will a
So change the speedo.

 

Good info. I was thinking about changing the stub axles as well, do you think its a 100% fit. or did nissan somehow decide to revise that too? Mind as well order the side oil seals then. Appreciate the help btw.

 

100% fit , as long as they are both VLSD diffs

 

Good info, too much of a pita for me to take out the entire diff and swap the stub axles.

 

6 bolts per side , I can and have popped my stubs out with the diff in the car.


Are you running a square tire combo? The 37 stubs would be perfect for a square combo.

 

Yeah there is no reason to drop the diff unless you're working on the diff or the bushings.

 

Good info, thanks! Will post the results in a few weeks for future reference. Away for business till then.

 

Square setup. If this fixes my speedo, I'm swapping stubs on my next day off.

 

2011 and up flanges have threads