[rookerrobert]

has anyone had experience with 3.70 diff. in a A8 hellcat? I'm thinking either that or 3.09.
The car dont get driven a lot and I'm not a fan of 2.62 gears

 

[16GoManGoHC]

3.70 be waaaayy to deep for the auto in my opinion at least, most guys go with the 3.09
But if you want to try a 3.70 I have 3 of them, sell you one if you’re interested.

 

[HerDaytona]

3???? 3.70's dam that's where they are. If a 3.70 in a Scat that leaves a 3.09 for someone?

 

[Himmelkat]

3.70 be waaaayy to deep for the auto in my opinion at least, most guys go with the 3.09
But if you want to try a 3.70 I have 3 of them, sell you one if you’re interested.

Do you have any that don't whine and/or are brand spanking new?

 

[rookerrobert]

lol.....no I'm sensible to know it dont have to be new to perform...3.70 is 3.70 I dont care about looking just working correctly. So you have 3.70 you had them in your m6? heck I'll do it old school and throw some cork's down in there

 

[16GoManGoHC]

Do you have any that don't whine and/or are brand spanking new?

Have one brand new, one with about 50 miles on it, one with 15 k on it. The 15k one does whine, ran with Severe Gear it’s whole life. Ones in the 3.90 box yet.

 

[rookerrobert]

Reason I was thinking 3.70's is mine has 2.62 and I dont see any reason just for 3.09. I could see if it was 3.23,342....but 3.70 seems to be worth the change.

 

[16GoManGoHC]

1000 for the new one, 800 for the 50 mile one, 500 for the 15k one, plus shipping of course or local pickup/meet within 100 miles. If any bodies interested in any of them let me know.

 

[16GoManGoHC]

lol.....no I'm sensible to know it dont have to be new to perform...3.70 is 3.70 I dont care about looking just working correctly. So you have 3.70 you had them in your m6? heck I'll do it old school and throw some cork's down in there

Yes, had 3.70 behind my M6, went to a 3.90. Have these 3.70’s around that I bought as spares. I’ll be staying with the 3.90 so no use for the 3.70’s now. My suggestion, buy the cheap 15k one if you just want to try one and hammer on it, cheap play/experiment, it’ll take all you can give it.

 

[Himmelkat]

3.90 or 3.09?

Do ALL these thing whine? In theory, a properly lashed hypoid gearset should not whine. What is with these rear ends? What is the deal with these things?

I had never heard of a whining rear end until I got in the Hellcat asylum.

 

[motorheadmike]

Use a 30" tall tire if you do go to a 3.70 or 3.90 to reduce the effective ratio a touch.

I'd be curious to know what gear/rpm a stock A8 2.62 and 3.09 HC and RE or S/S trap at. Actual, not theoretical. And then compare it to a set of 3.70s.