what year did the ls2 reluctor count change

[Ishmael]

I did the search and couldn't find the info. Searched at retrolsx but maybe I'm not using the right terms. Found out on LS1 tech that the change happened somewhere between 05 and 06 and that gto's might have stayed 24 but the vette's were mixed up. I know you tell what it is by the connector (black 24 and grey 58) but I would like to know before settling on a engine. I've got an 06 vette ls2 that I'm about to pull the trigger on but I need to know what that does to other options. Anybody know?

[Steve1968LS2]

late 2005.. only the first few LS2 engines (found in 05 GTOs) had the 24x reluctor. I would bet an 06 Vette has the 58x but since they were changing over at that time it could have one of the last 24x engines.

The only way to know for sure is to check the color of the crank sensor.. or maybe a dealer (service dept) could tell you if you had the VIN.

[wrkcar]

Not sure about the GTOs but I know the 05 Vettes were 24x and 06 and later Vettes are 58x.

[garys 68]

What are your concerns regarding the 24 vs 58 relutor?

[BuzzKillian]

I thik that is part of the question. What are the advantages/disavantages of 24 vs. 58. I'd like to know myself.

[garys 68]

The only issue I'm aware of is the DBW cruise control reqiring the BCM to function. But I'm not sure if that was exclusively a 24 vs 58 issue.

[Mike Holleman]

I did the search and couldn't find the info. Searched at retrolsx but maybe I'm not using the right terms. Found out on LS1 tech that the change happened somewhere between 05 and 06 and that gto's might have stayed 24 but the vette's were mixed up. I know you tell what it is by the connector (black 24 and grey 58) but I would like to know before settling on a engine. I've got an 06 vette ls2 that I'm about to pull the trigger on but I need to know what that does to other options. Anybody know?

The LS2 in my Elky is from an 05 GTO and is a 24. The LS2 in my 57 truck is 06 GTO and is a 58. I'd like to add cruise to the truck so please post what you learn.
Mike

[Ishmael]

I haven't learned too much actually. I've read that some 06 vettes had the 24x. I'm trying to figure out how it will affect my transmission choice. The problem might go away though as I just found another cool jeep for less than the engine I'm looking at. I can' afford either but I'd be stupid not to buy them both as I could turn around and resell either for a profit - though I prolly wouldn't ;)

[WS6]

Biggest issue to me would be PCM choice. With the 24x ring you can run the 411 computers or basically gen3 PCMs instead of the gen4 pcms. It's just easier to deal with but not really a huge problem.

[overZealous1]

lingenfelter does offer a 58x to 24x conversion module if you had to run it. costs $300 though

[Ishmael]

That's good to know, thanks.

[Mike Norris]

Here is what I recall. The 2005 and 2006 GTO as well as only the 2005 Corvette used the 24x crank with the E40 ECM. The 2006 Vette LS2 as well as the LS7's that year will have a 58x crank and E38 ECM.

If you are running an A4 4L60E trans, then the E40 ECM will work with the correct TCM for this trans, whereas a 58x ECM E38 will not and require a seperate trans controller. If you are running an M6 trans, either the 24x ECM or 58x ECM will work.

All E40 and E38 ECM's are designed for drive by wire.

There is also the E67 ECM which is used for Trailblazer SS and later CTS-V applications which will also work with a A4 trans. It is also used a lot with the GM harness and ECM packages.

I personally prefer the ECM's in this order to use (1) E38 (2) E40 (3) E67

Hope this helps.

Mike Norris

[Ishmael]

Thanks, that does help.