All of the 3.31 gears are going to be used GM gears. There are no aftermarket 3.31 gears. The closest thing to the 3.31 is the 3.42. I've used Yukon and US Gear with the least amount of trouble. I've been selling Yukon for several years now and they have been pretty consistant on quality.

 

Motive Gear for me. The performance sets are double lapped for smoothness and less noise.

 

What transmission do you have ? It may be time to go with an overdrive.

 

What transmission do you have ? It may be time to go with an overdrive.

I agree. With the cost of buying and setting up the new gears you are well on your way to a 200 or 700 overdrive. Heck even think about a gear vendors overdrive. mark

 

Wow, I am surprised 3.31 is not made in aftermarket. I had a 3.31 12 bolt, I gave $300 for, out of a pace car close to 20 years ago. I thought $300 was high back then. Probably bring 2k in a minute now! A good ratio though.

 

My Motives sing like the Mormon Tabernacle Choir

 

Hey Al.
Do you have the Performance set ?? As I stated, the performance set is double lapped for quiteness and runs cooler as well. I have 373's also.

 

i've seen Yukon gears on ebay and wandered if they were any good


i have a guy locally that will set up my gears for me for about $200, so i'll prob have around $500 total in changing gears....if i got a 700 or 200r4, one of those would cost me around $1200 plus a few hundred in installation and at least $200 in misc costs

maybe i'll just cross my fingers and wait for a nice oem set of 3.42's or 3.31's, hopefully i'll be able to find a set

 

3.42 was never offered in the car 12 bolt from the factory. All 3.42 gears are after market.

Gears $170, installation kit $92, shipping $30, labor $200 = 492. Add $30 for axle bearings and selas and you are at $522. If the axles are bad and need to be replaced then add $180 for $702 plus a little more for shipping.

If you happen to have a 4 series posi with that 4.11 gear then you are going to have to replace it with a 3 series. Add $415 to the price of parts, plus a little more for shipping.

 

My Richmond 3:73's perform flawlessly and quiet fwiw. :thumbsup:

 

You can't always blame the gears for singing. Bunch of stuff could cause it.

 

Motive gears were made in Italy, but they moved production to Korea and the quality went way down. If your Motive Gear was made in Italy then it's good. If it was made in Korea then it's probably junk. The Motive Gear made in Italy that has been in the back of my truck has worked very well for about 11 years and around 100,000 miles.

 

I bought my Motives 2 years ago and I have no problem with them. 4.10s Quiet