Midnight00SS

Wut do u guys think of this kit?? anyone here use it before? im thinking of going with motive 390s for my SS

tals7

what kit?.

Midnight00SS

http://www.thunderracing.com/catalog...&vid=3&pcid=68

Blue85350

iTrader: (1)

looks like a good deal just on price alone.

Midnight00SS

yea how is the stock posi units in these cars???

Midnight00SS

anyone ?

Midnight00SS

no one is running this kit ?

TRANS-DAD

iTrader: (1)

GM dosen't make a 390 gear but but they do make 4.10 & will be the quietist gear you
can get! & yes the ratech kit is good!

Midnight00SS

yea but i want the motive 390s, are they just as good?

01ssreda4

iTrader: (96)

WOW thats a great price for all that. Gears, oil, rebuild kit and alum cover with stud kit. The Motive's will be fine, they arent always 100% quiet but my advice is to take it easy on them during break-in. Ratech kits are fantastic.

kinglt-1

iTrader: (26)

I have motive 3.73's and they have a little bit of noise. The guy I bought the car from tried 3 different sets, never got better or worse. From what I hear most gear sets are that way unless they are stock gm units. You will love the 3.90's fyi!!

01ssreda4

iTrader: (96)

Motive 4.10s I have installed (blue box) seem to be whisper quiet. My 3.73s (orange box) have slight whine at 50 mph.

kinglt-1

iTrader: (26)

^The gears are motive orange box 3.73's, not sure if the previous owner ever tried the blue box units...Do they have the blue box version in 3.73? if so ill try swapping them. thats exactly what mine are doing now, slight whine at 45-50.

01ssreda4

iTrader: (96)

to my knowledge they do have a blue box 3.73

Midnight00SS

thats cool, are all u guys running the stock posi unit in there still?? and how much of a difference did u notice??? i need to wake up my first gear lol

Midnight00SS

with an m6 i forgot to add

01ssreda4

iTrader: (96)

4.10s in an M6 is the ****. They shoulda came with them factory. No way will you ever go back to 3.42s.

caddobass

iTrader: (1)

I would say go with the 4.10's in a M6 car. I went with 3.90's in my A4, I think you would enjoy the 4.10's alot more in a M6 car.

Midnight00SS

yea but is there much of a noticeable difference from 390s to 410s???

wicked ws6

iTrader: (1)

I bought the thunder racing kit w/3:73 motives, and upgraded to the ratech deluxe install kit. I've put 450 miles on it now, doing the 500 mile break-in, and so far no noise at all. At 500 miles I'm going to change the fluid and give it hell, we'll see how it does from there!