Hello, I'm new here but I am a huge fan of the Monte Carlo. I've got a 2000 SS black on black leather in very good condition. Mileage is getting high and last time I did a pan drop I found a LOT of clutch. Also, the computer puts the transmission into a high pressure safe mode because it is taking too long to shift. It's ready for a rebuild. I've got a couple questions about doing a supercharged swap. I have access to a Buick Park Ave SC engine and transmission with low km/s. I know I'll be needing the 4t65-eHD and the engine as well because of compression ratios. I am wondering if my computer can be programmed or do I have to get one from a SC car? Also, with the difference in gear ratios, will my speedometer read correctly? Is this something that can be adjusted in the computer? Also, are there any other issues I should know about? I'm assuming everything else will swap directly such as axles, alternator, any sensors that it might need? All my stuff is new or working perfectly so it'd be nice if it would switch over.

Thanks for any replies

 

First I want to say, welcome to the forum! If you hang around long enough, there's a lot to learn here and you'll have fun doing it too. Plus, we might even learn something from you too!

Next, I want to make sure that you've seen this thread: https://montecarloforum.com/forum/en...-bumpin-24896/ There's a LOT of useful information there for beginners to learn from, including doing an L67 swap. Now, let me move onto your questions.


Actually, you don't NEED the tranny from the Buick. You can run an L67 with a non-HD 4T65E tranny. The main difference between the HD's and non-HD's are the gear ratios (better in the non-HD) and the HD has a slightly better differential. That's about it. Also, besides the L67 swap, you can do what's called a "top swap" and gain a little more power due to the higher compression ratio of the L36.

Yes, your PCM can be retuned and should be! You can use an HPTuner, or a Powertuner or if you're not comfortable doing a custom tune yourself, you can order one from www.zzperformance.com.

The 4T65E-HD gear ratio is 2.93 compared to the non-HD's 3.29. The 3.29 is better for accelleration, while the HD's is better for fuel economy. This can and needs to be adjusted in the PCM for your car to run properly.

Everything is pretty straight forward if your just doing a direct swap. If you're going to do a top swap, there are a few issues to worry about, but it can be done safely. However, I strongly recommend that you talk with people who have had problems with doing a direct swap or a top swap just so that you get some perspective on what can go wrong, and also what the job is like.

Your welcome! Have fun modding!

 

Thanks very much for the fast reply and the link! If this swap happens I will definitely be using the HD transmission simply because mine has 240,000 km/s and it's soon time for a rebuild. As for my engine, it is still very tight, smooth, and if you aren't paying attention you'd never know it was running. The only reason I want to swap it is because all the Buick stuff comes as a package and it has 110,000 fewer km/s. I'll have a look at that thread and see what it says about wiring differences. Thanks again and I'm glad to have joined!

 

Welcome to the forum! If you do a swap take plenty of pics and document everything for people like me that will be supercharged eventually

Do you know when you'll start working on it?

 

Welcome, and hope you do it pictures would be cool.

 

It's not a 100% go for sure, but instead of spending money on my old transmission or a rebuilt one, I'm leaning towards getting this complete Buick setup. If I do it I'll probably wait until I travel back to Nova Scotia at the end of April. I'll be posting pictures and asking more questions for sure. Right now my major concern is wiring and other electronic issues. Also, I haven't found a clear explanation on the difference in axle sizes or splines. Also, I should mention that the Buick setup is from a 97' but is a Series 2.

 

I've decided to do a pan drop and filter change this weekend. Last time I did that I found a lot of clutch. The result of this will determine if I buy the Buick setup. Transmission goes into a high pressure mode and shifts hard due to prolonged shifting times. Could this be a fluid break down issue? It's not very old but it did tow a trailer 3100 kms last summer on this fluid. I was careful not to let it shift much at all and installed a cooler.

 

Well I bought the supercharger and intake manifold and will hope to be putting it in here in the next few weeks cause that how I do things get-rrrrrrrrrrrr-done ...I don't play around I just do it...lol....I will take a lot of pics so I can tell everyone with the pick what's gonna happen when they run into problems hope I can put into perspective for all those a little un sure including myself I read tons of threads everywhere and still haven't found out what gets plugged into map sensor but time will tell

 

Sounds great I look forward to seeing the progress and any issues that come up!

 

Yeah me to on the issues that come up hopefully it goes smooth