Series I to Series II Swap? - Page 2 - 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 09-28-2002, 08:35 PM   #11
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JR, you'll NEVER find out. Josh'* is a '93, just like mine (including color...minus the ghetto gold rims, his are the same, only raw aluminum)! Other than the intake and tranny, it should be identical. We'll be pulling his valve covers off soon.....anything in particular that will stand out? I've never had mine off. What'* the recognizable difference between the old rockers and the rollers?
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Old 09-28-2002, 10:29 PM   #12
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Well I've not recieved that E-Mail yet! But I can say that the Engine & Trans will have to swappped. Depending on what year of Series II engine you want to go with depends on what mods have to be done too. If you're thinking of a later 3800 NA engine then engine & trans (4T65-E) would be a good choice. f thinking of a 3800 SC, then engine & trans (4T65-E HD) would have to be done instead. All enginw swaps will require a different engine wiring harness & trans harness to match what ever installed. A new ECM will also have to be installed to match the year of the new engine/trans swap too. Of coarse the minor details like sensors & what not will also have to be changed as needed. If you want more detailed info drop me a line at: [email protected]
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Old 09-28-2002, 10:44 PM   #13
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Quote:
Originally Posted by willwren
Quote:
Originally Posted by pontiacfan1978
91-94 SERIES 1 / 95-03 SERIES II
That may be true for the Normally Aspirated (NA) but not the Supercharged (SC).

SC Series II weren't released until the 1996 Model. All 92-95 SSEi'*, SSE, and SE with the factory SC are Series I.
That'* correct! To a point though. Note: all 3800'* before 92 were different in many ways. There was actually 3 different 3800 engines! 2 were SFI & 1 was MFI. In 92 GM experimented again & came out with the EGRless 3800 Series I (Which I've got in my 92 SE). This engine was prone for being hotter than any other 3800 hence plagued with problems like exhaust manifolds cracking from heat exposure & exhaust valves burning up also due to heat exposure (I've got both these things as I'm speaking now). The 93 - 95 3800 NA Series I engine once again gained back the EGR Valve though. In late 95 the 3800 NA engine changed up to the Series II engine style. In late 96 the 3800 SC engine changed up to the Series II engine style. All 3800'* from this point on (NA & SC) are Series II'*. NOW as for transmissions.....The 4T60 was in the pre 92 Bonnevilles. The 4T60-E was first introduced in 92 when GM change Body Styles. The SC'd 3800'* recieved the 4T65-E trans instead to beter handle the added torque. Later, the NA 3800'* recieved the 4T65-E trans & the SC'd 3800'* recieved the new 4T65-E HD trans to better handle the added torque of the new Series II'*.
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Old 09-29-2002, 12:35 AM   #14
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Well hell, we're all a bit more engine-smart now! It'll be interesting to see what'* under JSeabert'* valve covers....when we get to them! Thanks for all the info.
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