do I REALLY have a 2 series Carrier?

**z28punk** · 05-14-2010, 06:46 AM

I pulled off the diff cover at work yesterday and was going to start my gear swap/overhaul, but before I took the carrier out I noticed the pinion gear that was installed was a lot larger than the 3.73's I was going to swap in. I know my car has 2.73 gears because I have seen the build sheet and the car cruises at 1500 RPM's between 60 and 70 mph.

I also emailed ws6store.com (Very Helpful and quick responses BTW) and verified the part number. I have the correct gears for a 2 series carrier.

so does this sound like I have the right gears?

**pajeff02** · 05-14-2010, 07:45 AM

The new ring gear should be a lot thicker than your stock one. The higher numerical ratio moves the ring gear teeth closer to the pinion as it is smaller in diameter. A 3-series carrier would have different backspacing to make up for this offset, so a thicker gear is not required. Sounds like they got it right for a 2-series carrier.

**z28punk** · 05-14-2010, 09:38 AM

ok thanks. it just threw me off by the big size difference. I knew going from 2.73 gears to 3.73's would be a big difference, but not this big.

**pajeff02** · 05-14-2010, 10:11 AM

You can take a rough measurement to check it. Pinion centerline to face of carrier (back of ring gear) should be identical on both sets. Lay your new ring gear on a flat surface and have someone hold the pinion gear horizontal to it with the teeth engaged so you can take a measurement of the new set.

**z28punk** · 05-14-2010, 03:44 PM

ok i'll be checking all this monday on my day off.

**oldmanZ28** · 05-14-2010, 07:29 PM

for reference

**pajeff02** · 05-15-2010, 07:05 AM

^^ Good info. Thanks for posting it.

**Hi-Po** · 05-15-2010, 08:58 AM

Its been in the sticky up top the whole time also

**Cutlass** · 05-15-2010, 10:18 AM

might as well throw this picture in here from the same sticky

**pajeff02** · 05-15-2010, 02:10 PM

Originally Posted by Hi-Po

Its been in the sticky up top the whole time also

My bad... didn't even think to look up there.

**z28punk** · 05-15-2010, 02:37 PM

sorry. I was in a hurry. I thought this cant be the first time someone asked this question

**z28punk** · 05-19-2010, 08:44 PM

ok so I got the gears installed and I am extremely happy. I am still only at 2200 rpms at what I think is 65 mph (no tune to fix the speedo yet). I am thinking I should have went with 4.10's, but o well I am still happy. the ring gear was MUCH thicker to make up for the difference in pinion gear size like stated above.

thanks for all the help.

**oldmanZ28** · 05-20-2010, 12:27 AM

2.73 upgrade to 3.73 is the general consensus recommended gear mod. ENJOY !

**z28punk** · 05-20-2010, 06:51 PM

I love the added kick in the ass. I cant wait to see what its like after I get the built transmission tuned and get the speedo corrected. I can tell its having problems figuring out what to do since the speed is off.