SC Engine swap - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-31-2010, 09:43 PM   #1
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Question SC Engine swap

I am wondering if I swap out my engine in my 95 non super bonneville to a supercharged what besides the computer would have to be done?
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Old 05-31-2010, 09:45 PM   #2
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Not sure if that'* a different transmission or not. Mike should be able to answer that.
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Old 06-01-2010, 12:13 AM   #3
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The 4T65 family didn't hit the Bonneville until 1997; everything from 1992-1996 is the 4T60-E (standard) or the 4T60E-HD (option), which I'm 99% sure are interchangeable.
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Old 06-01-2010, 07:00 AM   #4
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Don't quote me, but I believe Bill said only thing needed to be done tranny wise was swap the diff, diff cover, and passenger side driveshaft???
And considering its a 95...
PCM swap
Engine harness

I noticed fuel pumps have different part #'* between an SE and SSEi. So an SSEi fuel pump would be needed yes no?
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Old 06-01-2010, 08:24 AM   #5
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95 is one of the years I have not tried to swap yet. It'* an oddball year being that the NA motor was a Series II and the SC motor was a Series I. If I were doing it, I'd automatically swap the engine harness to a 96 or 98 based on which transmission I wanted to use.

4t60 = 1996 harness
4T65 = 99 or 99 harness

You would be adding a pcm into the engine bay like the 96+ cars have and moving some pins at the firewall as well.

Mike..that info is to go from a 4T65 nonhd to hd
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Old 06-01-2010, 07:25 PM   #6
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So Trans, Harness for matching computer.
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Old 06-02-2010, 08:53 AM   #7
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and engine
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Old 06-02-2010, 03:23 PM   #8
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I have in it a non super and I cannot figure out how to get the belt off I got it off of the tension pulley but it'* wrapped around something by the motor mount and can't figure it out
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Old 06-03-2010, 08:25 AM   #9
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Please elaborate on that last post ... came across garbled, off topic (I think) and ...pretty fuzzy.
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Old 06-04-2010, 03:56 PM   #10
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I need to get my drive belt off and it looks like the motor mount is In the way
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