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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 03-01-2006, 03:52 PM   #11
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There are also a few different wiring variations between the 96 and the 97 that have to be addressed, I would elaborate, but my notes are at home.
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Old 03-01-2006, 04:08 PM   #12
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Fill me in once you get home. Some of the information in your notes may be new to me.
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Old 03-01-2006, 04:19 PM   #13
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Quote:
Originally Posted by ELMACHOGERACHO
but the 96 tranny is more reliable than the 97
I don't think this is the case for the higher reving series 2. The pump in the 65 has 11 vs. 9 fins in the 60 IIRC. And it is better suited to handle the higher rpm power.

Edit: the 4t65 has 11 vanes and the 4t60 has 9 vanes.
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Old 03-01-2006, 04:41 PM   #14
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The PCM couldn't care less if the fuel gauge is connected or not on all my Fiero 3800SC 4T65E swaps I have never connected it. I am using a 97 GTP on my 3800SC 4T65E Trans Sport van swap and it also doesn't care the most it will do is throw a code that only a tech II scanner will catch, won't throw a check engine light. On my Fiero swaps I do not connect anything to do with crusie, ABS, traction control or even A/C when its not used and the PCM still doesn't put on the check engine light. Dan
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Old 03-01-2006, 04:48 PM   #15
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Quote:
Originally Posted by 95naSTA
Quote:
Originally Posted by ELMACHOGERACHO
but the 96 tranny is more reliable than the 97
I don't think this is the case for the higher reving series 2. The pump in the 65 has 10 vs. 7 fins in the 60 IIRC. And it is better suited to handle the higher rpm power.
high rpm hp doesnt kill trannies, low torque and it has been proved that 60 hd'* fail less than 65 hd'*
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Old 03-01-2006, 05:06 PM   #16
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Quote:
Originally Posted by Fieroflyer
The PCM couldn't care less if the fuel gauge is connected or not on all my Fiero 3800SC 4T65E swaps I have never connected it. I am using a 97 GTP on my 3800SC 4T65E Trans Sport van swap and it also doesn't care the most it will do is throw a code that only a tech II scanner will catch, won't throw a check engine light. On my Fiero swaps I do not connect anything to do with crusie, ABS, traction control or even A/C when its not used and the PCM still doesn't put on the check engine light. Dan
Great information Dan. Since the PCM doesn't have to be wired into the fuel gauge circuit, almost all of the C101 connection differences between the 96/97 are eliminated.
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Old 03-01-2006, 05:10 PM   #17
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Good for you and good to know. I guess then that you really won't need most of that info I sent, now, lol. Still, I know I learned from it.
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Old 03-01-2006, 07:24 PM   #18
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The PCM diagram you sent me was still really useful. After I cross referenced the 97 and 96 PCMs I found that the only pin differences have to do with the new fuel sending unit wiring and the 4t65. Other than those couple of differences, the 96 and 97 are identical PCM wise, except for programming of course. That'* when I came up with the idea to just leave the sending unit pins on the new PCM and wiring harness open, eliminating the majority of my wiring issues.

Now I just have to figure out why on the '96 the BCS is only connected to circuit 639, while the '97 has an extra pin for it at D2 on the C101 connection that hooks up to circuit 239.
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Old 03-01-2006, 07:27 PM   #19
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Quote:
Originally Posted by ELMACHOGERACHO
Quote:
Originally Posted by 95naSTA
Quote:
Originally Posted by ELMACHOGERACHO
but the 96 tranny is more reliable than the 97
I don't think this is the case for the higher reving series 2. The pump in the 65 has 10 vs. 7 fins in the 60 IIRC. And it is better suited to handle the higher rpm power.
high rpm hp doesnt kill trannies, low torque and it has been proved that 60 hd'* fail less than 65 hd'*
The pump on the 4t65 is better suited for higher revs though, so the risk of burning up the transmission due to inadequate fluid flow is lower.
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Old 03-01-2006, 07:48 PM   #20
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Quote:
Originally Posted by ELMACHOGERACHO
Quote:
Originally Posted by 95naSTA
Quote:
Originally Posted by ELMACHOGERACHO
but the 96 tranny is more reliable than the 97
I don't think this is the case for the higher reving series 2. The pump in the 65 has 10 vs. 7 fins in the 60 IIRC. And it is better suited to handle the higher rpm power.
high rpm hp doesnt kill trannies, low torque and it has been proved that 60 hd'* fail less than 65 hd'*
That not the only thing that kills trannys. How do you think your trans is going to shift when you have more power at a higher rpm? Everything is rotating faster with more power. You need more pressure for the clutch packs to grab.
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