V6 AT LFX new differential bolt on question

[Kuba77]

Hello Guys!
Im EU based guy so unfortunately my knowledge about US cars is almost equal to zero
Anyway i just love my '12 LS1 Camaro
Recently I found out that my rear diff lost at least 2 tooths
( found it during oil change)
So for sure I need to fix it. It will cost few hundred bucks with labour so I decided to go rather for after marker new one.
W/o axle change
But I cant tell which one will be best for me...
I saw opinions that handling could be better. I could use stronger one for like 450HP -500HP cuz im planning to put small turbo in next year based on german turbines available in europe.

I see many of them on ebay and on this site ranging from 440 to 550 $
https://www.summitracing.com/int/sea...t/model/camaro


This year im swaping brakes first for ZL1 ones and I need to fix this differential situation .

Looking for Ya help
Jimmy

[DSX_Camaro]

If you change the rear differential to the unit in the manual V6 / both SS's, you also need to change the axles and hubs I believe. And maybe the second portion of the driveshaft. I'm hoping you have a 1LS as you say and not a 2LS, because the 2LS would also need a computer recalibration for the rear end ratio being different.

If you don't wanna swap anything, your only choice is a new, factory 1LS automatic differential to my knowledge.

[Kuba77]

I just got that info from car report. I have auto V6 LFX
I called chevrolet today with my VIN and they said i have COUPE 1LT / 3.6L V6 DOHC 24V FFV/ RACK & PINION

I wanted to buy one of those listed differentials as swap for mine (damaged).
Car is running ok for now, but i lost some tooths its matter of time... when disaster will come.
Is there bolt on aftermarket diff to use with my axles ?

[DSX_Camaro]

No. You have to have a stock V6 automatic differential. There are no other options.

[Kuba77]

Thanks man, so i need to rebuild it. Which aftermarket company making resonobly priced gears but stronger that oem? Or should i gp for oem straight away? Not sure about what to buy now

[DSX_Camaro]

Honestly, I don't think it matters much. Yukon Gear has 3.23 gears for the 7.6" IRS differential (V6 automatic diff) for example but I doubt you'll find any gears for the 7.6" that are objectively stronger or anything because it's still the same ratio. Not like the difference between 3.70 and 3.73, 3.90 or 3.91, 4.10 vs 4.11, that sort of thing.

[Kuba77]

ok thanks for help again. appreciate it very much

[1Coopgt]

Folks need to read the Stickies posts above .

So, here are the other key differences that your Chevy salesperson likely doesn’t know and won’t tell you about:The 2LS is geared differently than other V6 Camaros.

The 1LS and all LT Camaros (auto or manual) come with a 3.27:1 axle ratio. The 2LS, however, has a 2.92:1 ratio.

Op you could change to a 3.91 to 1 Ring & pinion if you wanted too.

If the info in the sticky above is correct the 1LS manual & LT auto & manual have the same diff & gearing as the SS. That is why a lot of folks try to find 1LS rearends so they can swap to a 3.91.

Someone correct me if I'm wrong.

[Kuba77]

Very interesting 1Coopgt. I was thinking about gear ratio recently. I can buy SS rear diff with easy here. Just talked to guy salvaging nice SS with 15000k miles on it, because i want his brembo brakes set (should get it next week for 1000USD with pump , pads, rotors).
I will ask him about diff. Not sure he has auto or manual . Do i need axles too? As You said complete rear end?

[1Coopgt]

From your original post you said you had a couple of broken teeth in the rear end. I could be mistaken but I don't think you need to buy a new rear diff like the one you posted in the link. Unless it was one of the little gears inside the diff. All you need is the ring & pinion gears I think without seeing anything. The ring gear bolts onto the diff. Did the Mechanic show you where the teeth were broken off ?

[Kuba77]

No i still need to check diff, i need to leave car for few hrs in shop. Teeth are from satelites (hope so) or this big ring not from attack - they are not sharp
I will do the check next week i hope. Im occupied with running errands for my wedding

pic below , sry if its to big i have big screen lol. pack of cigs for scale

[DSX_Camaro]

Originally Posted by 1Coopgt

Folks need to read the Stickies posts above .

So, here are the other key differences that your Chevy salesperson likely doesn’t know and won’t tell you about:The 2LS is geared differently than other V6 Camaros.

The 1LS and all LT Camaros (auto or manual) come with a 3.27:1 axle ratio. The 2LS, however, has a 2.92:1 ratio.

Op you could change to a 3.91 to 1 Ring & pinion if you wanted too.

If the info in the sticky above is correct the 1LS manual & LT auto & manual have the same diff & gearing as the SS. That is why a lot of folks try to find 1LS rearends so they can swap to a 3.91.

Someone correct me if I'm wrong.

Automatic V6 has the 7.6" differential, Manual V6 has the 8.6" differential shared with the SS. Automatic V6 differential can only use 3.55 Richmond gears as an aftermarket option.

Gears =/= differential size

[DSX_Camaro]

Kuba, like I said in a previous post, if you swap to an SS differential, you need SS hubs, SS axles, and at least the second half of the driveshaft to be able to use it. If you get an automatic SS differential, you'll have stock gear ratio in the rear. If you get a manual SS differential, you'll need to tune your car to correct the speedometer (but you'll get a little bit more performance, which is sweet).

(Also, people try to find 1LE rear differential's, not 1LS, for the 3.91 rear end ratio, and the record)

[1Coopgt]

Originally Posted by DSX_Camaro

Automatic V6 has the 7.6" differential, Manual V6 has the 8.6" differential shared with the SS. Automatic V6 differential can only use 3.55 Richmond gears as an aftermarket option.

Gears =/= differential size

So you're saying the Sticky at the top of the LFX forum is wrong ? That was where I got that from .