UnVMySS

iTrader: (31)

Ok, I have been browsing, and found so much information and right now my brain cannot process it all, lol...
I have a 2000 camaro SS m6. I believe it has 3.42's from the factory. I am shopping for 4.10 gears and see many options, which ones do I need? My rear is all stock... can't afford a nice new rear so this'll do until it breaks.

I am in Afghanistan, so I can take my time on this, just need a little assistance so I don't make a 300 dollar mistake. Thanks in advance!

FirstYrLS1Z

iTrader: (4)

A 2000 Camaro Z28 M6 would have come off the factory line with 3.42s'. Being that it's an SS and went to SLP after leaving the factory to make an SS out of it,it could have been optioned at SLP with a different rear ratio gearset,but you seem to believe it still has the 3.42s' in it and it wasn't changed at SLP.
You would need a 4.10 7.5" 3 series gearset.

7.5 is the same as 7.625.
a 7.625 rearend has a 7.625 OD ring gear mounted on a 7.5 carrier.
a 7.5 rearend has a 7.5 OD ring gear mounted on a 7.5 carrier.
rearend parts are the same: bearings,seals,shims,etc.

If you're planning on rebuilding the rear while it's apart,you'd also need a master rebuild kit for bearings,shims,seals,crush sleeve,pinion nut.

LS1_Sean

iTrader: (1)

How many miles on the car?
Master Bearing Kit (Not Necessary if the bearings are in good shape)
Solid Crush Sleeve (Optional But I would highly recommend)
4.10 ring and pinion
80w90 gear lube for break in.
Then 75w90 or 75w140
80w90 did not hold up in my experience wore the hard facing off on the gear. I believe this to be because the 4.10 has a much higher pressure contact point
and When the rear end got hot it had more gear noise.
I noticed on the second time around with the Amsoil 75w140 that the gear noise seemed to stay the same level from cold to hot.
6k miles and still in once piece :knock on wood:

CamaroZ28_LS1

iTrader: (5)

3 series carrier James and since you have traction control you don't need the reluctor ring on the ring gear.

LS1_Sean

iTrader: (1)

^this.
also as far as brands go Richmond or Motive are popular but if are willing to pony up for a GM gear it will be a quieter than an aftermarket gear.

guppymech

iTrader: (7)

I tried 75w140 in my 10 bolt to cushion the gears alittle but the thick oil made my Auburn posi slip. Went back to 75w80 and it's better.

01ssreda4

iTrader: (96)

Motive GM75410 will get you the right gears. And order the Ratech rebuild kit of your choice.

SteveC

Have the gears "cryod" before installation.

http://www.cryoplus.com/

SteveC

HioSSilver

iTrader: (8)

Don't do 4.10's. It is to much gear for a bolt-on car. Do 3.90 or 3.73.

LS1T56FTW

iTrader: (3)

Don't listen to this guy, 4.10s should come in the T-56 cars from the factory.

Don't listen to this guy either. For the minimal gains you will see from this, you are better off just buying a new gearset if yours breaks, rather than trying to make one set last.

This is good advice. Try and get the Ratech solid spacer instead of the crush sleeve. Eliminating deflection under load WILL increase the life of your gearset significantly. Under load you want contact across the full face width of the gear tooth, this will help do that. If the gears are misaligned (which happens under heavy loads/hard launches) you will only get contact across only 25-50% of the gear tooth which significantly decreases the strength of the gearset - which is why so many people break these rears.

P.S. I am a gear design engineer...I know what I am talking about.

All of that aside, I run Richmond 4.10s in my car. They seem to be pretty strong - they were installed by a reputable local company (done by the previous owner of this rear - I just bought it axle to axle and installed it). If I were to buy gears I would have went with the Motive gears because they are known to be quieter, but almost 100% of the time it comes down to how well they were installed.

HCI2000SS

iTrader: (2)

Another vote for the 4.10's here! Hell I run a HCI setup with a manual, and IMO the 4.10 is perfect! So on a bolt on only car I can't see how it would be overkill at all.

Cra-Z Larry

Don't forget the rear support cover either!! My 10 bolt went over 200 runs with 1 rebuild (not failure, but rebuild). It had Motive 4.10s when I bought it and was rebuilt with Yukon 4.10s. Yukons were noisier than Motives, but yuks had a solid pinion spacer. Anyway, the yukon posi gave up and took out the r&p with it so I bought a used 12 bolt w/3.73s. It slowed the et so I'll be changing back to 4.10s, possibly 4.30s as I just bought a set of 27.75 tires.

HioSSilver

iTrader: (8)

Have you had any of the other gears in a m6 car?

Do you think goin 101mph @ peak hp is good when your in 4th gear?

LS1T56FTW

iTrader: (3)

3.42's, 3.73's, 4.10s.

Seeing as how my peak HP is at 6550, I am actually at 123.5MPH at my peak HP.

P.S. I went from trapping 90MPH in the 1/8th to 98 in the 1/8th when switching from 3.42s to 4.10 gears.

HioSSilver

iTrader: (8)

It's not about you. It's about op. For him looking at being bolt-ons 4.10 is to much gear.

You did'nt pick up 8mph in the 1/8 just by changing gear. There are other factors in that 8mph gain. I bet there was a tire/traction change there to. I've made the the change before. Goin from 3.42 to 4.10 I only picked up 1-1.5 mph in the entire 1/4 Going by your theory I shoulda picked up 10mph. I have picked up mph by goin to 3.90 over the 4.10.

LS1T56FTW

iTrader: (3)

Yeah, I have two buddies with bolt on LS1 cars with 4.10s and they are a blast. I don't think the OP can go wrong with either of the gears, but I really personally like the 4.10s.

Anyway, yeah I did pick up 8mph by changing the gear, and that was it. Both times were done on the exact same set of Mickey Thompson ET streets so traction/tires were not changed. Literally just swapped rear ends and went to the track and those were my gains.

HioSSilver

iTrader: (8)

Op....do yourself a favor and get 3.90's or 3.73's. Something tells me your not gonna pick up 8mph in the 1/8 like ls1t56ftw.

CamaroZ28_LS1

iTrader: (5)

I had 4.10's but broke ring gear teeth. Shifting into 5th at 120ish mph was blah... when I went to a 9" I chose 3.75's because I also had 3.73's and loved the gearing. Also had 3.42's which felt slow.

01ssreda4

iTrader: (96)

4.10s are perfect for a bolt on car IMO.

And, Motive just acquired Richmond as an FYI.

guppymech

iTrader: (7)

Say goodbye to US jobs at Richmond Gear. Motive makes their junk overseas.