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Old 06-16-2002, 12:49 PM   #1
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Default Swap 4T60E for a 4T65E-HD?

If I have a 4T60E could I swap it for a 4T65E-HD transmission? I am looking at doing some serious upgrades in the next year or so and the last thing I want to do is have 350hp rip my tranny apart. I know the 4T60E is the weaker of the transmissions; besides, I would like to get the Intense 4T65E-HD transaxle with the 3.69:1 gearing. Not sure if the hookup is the same but I assume they are at least close.

I am still uncertain whether I have the Series I or Series II engine but I don't know if that will make a difference at all.
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Old 06-16-2002, 02:06 PM   #2
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I currently have a tranny shop working on upgrading the 4t60-e or creating a swap kit for the 4t65-e. I will be talking to them on Monday ill let you know what he says. I have a new lead on a kit for the 4t60-e but the lead is a bit slow coming. Once again I will know on Monday. Oh the 4t60-e kit can take 300hp no problem.

TY
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Old 06-16-2002, 02:23 PM   #3
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Send a pic of your engine with and without the cover on.
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Old 06-16-2002, 03:47 PM   #4
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Here is a quick html page with the pictures I currently have of my engine. Sorry, none without the cover yet.

http://www.users.qwest.net/~jacquesgordon/engine.html

If this helps:
Here is what I do know:
1) Pontiac (Pontiac online customer answer center) said I have a Series II after I sent them the VIN and some #'* from the block. I don't fully believe them though.
2) I have the M62 Eaton Super charger. I compared mine to the ones on Magnussoní* site and I have what appears to be the same shell as the M62 (less ribs than the M90 but the same number as the M62).
3) My buddies 98 GTP is a Series II and has a different belt configuration. My supercharger belt is on the inside of my alternator belt where as his is on the outside. I also have a 3" pulley stock where his is closer to 4".
4) Someone else in this forum, can't remember who, mentioned that in 95 the N/A were Series II but the */C were still Series I.

Any information you may have is GREATLY appreciated!
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Old 06-16-2002, 05:18 PM   #5
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Ok your block is definitely a series I. Your sc may be either for all I know but I would say its a series I. There is another way to tell but requires a dyno of you hp.

TY
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Old 06-16-2002, 05:50 PM   #6
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I was hoping it was a Series II (more mods for them) but I had been getting the feeling it may still be a Series I. This would also explain why SLP makes parts for the 97+ GTP and 96+ SSEi respectively.

Thanx for your help. At least now I know...
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Old 06-17-2002, 12:52 AM   #7
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Well, #1 since you have a SSEi, you have a 4T60E-HD in the first place. And no you cannot do a straight swap from a 4T60E to a 4T65E because they the 4T65E has an extra connection from the PCM on the side. I will see if I can post a pic later so you can see what it is. The only way you can get a 4T65E-HD is to buy one from a SSEi or GTP from 97/98 or later and pop that into your car. And on top of that you have the Series 1 engine. You should just swap it out for the better Series II engine and that would be alot easier and you would have more potential.
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Old 06-18-2002, 10:22 PM   #8
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I would have to agree with 99BonnevilleSE! The best choice (& easiest) swap would be the Series II 3800 */C & 4T65E-HD Trans pair! You would still have to change the engine & trans harnesses, as well as the ECM too. The good news this swap should be able to handle just about anything you could dish out! :P NOTE: Even Speedyguy possible couldn't wreck this combo! Sorry about that jab Ty!!! I might still do this swap or maybe something even more radical like the NorthStar V8 & 4T80E swap from a 98 up Seville! I figure with THIS combo & the Bonneville'* weight I could blow the doors off anything at the track in the quarter mile! Can you imagine! A Bonneville 4 door family sedan sleeper! By the time I'm done the car will not look the same! Radical hood redesign with ram air scoops and custom front end work to bring out more of my "SKULL" motif!
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Old 06-18-2002, 10:37 PM   #9
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Go dude. Not a jab just the truth. I wreck stuff. So far response to rebuilding the 4t60-e has been slow but the option is there and there is hope to make the regular or moderately modified 3.8 on a 4t60-e a possibility. Actually found a guy who has already done most of the work through a friend but its not for sure so donít quote me yet just bugging da rat. LOL Now for the 4t65-e HD cool go for it but if you want the most, all the power needed to obliterate yourself then the kit that myself or da rat builds will be the final solution. Either way it will happen, and with 600hp to blow the doors off a vette with two friends along for the ride you cant go wrong. LOL.

TY
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Old 07-09-2002, 01:13 AM   #10
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if you are serious about swapping your engine and tranny and you plan to do lots of engine mods, i would seriously recommend the Intense Performance Tranny. I know tons of guys who burn up 4t65e-hd trannys all the time. I have yet to hear of anyone breaking an Intense tranny.

Lee
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