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1996 NORTHSTAR ENGINE REPLACEMENT


Northstar

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2 hours ago, Northstar said:

Nice upgrade!

Note that I haven't had that car for over five years now.  I've put the manuals away, but will get them if needed here.  I have GM shop manuals for 2002-2012 model years on DVD, so if you decide to look at a 4T80E from the 2004 model year or later to get the electronically controlled converter clutch, I'll be able to look at the connectors to get a good idea whether it is compatible with the stock 1996 PCM, see if the PCM does anything when the P0730 is set.  I see from my summaries that it is a type C, which means that it turns on the MIL.

If you do change the final drive ratio, you will want to store it in the PCM with a Tech II to get the speedometer calibration right, and that should turn off the P0730.  I don't know if there is another number in the PCM that you can change when the tire rolling diameter changes, but I would expect that there is.

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-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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  • 2 weeks later...

On 10/3/2018 at 1:48 AM, Northstar said:

I remember Scotty AKA Body By Fisher

 

I still have my 1996 STS and it still needs a freshly studded Norsthar block using the kit from NP.

Basically I'm going to re-power her along with the 50hp Stage 3 tune from NP and a tire burning shift kit for the 4T80E when it hits 2nd gear.

I will then try to get above 155mph since my speed limiter will be removed out in the desert.  (new set of Z rated tires installed first)

Does this sound like a good plan? Do you have better advice for me?

 

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How are you doing.  I am very curious the results of your tune.  Keep us in the loop

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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7 hours ago, Northstar said:

thanks! Will document everything I do and report back. Take care! 

Where did you find a shift kit for the 4T80E?

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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