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.

Quick check on 97 Transmission

Old Jun 26, 2006 | 09:17 AM
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Originally Posted by BillBoost37
As mentioned...my opinion w/o data to back it up.

Meanwhile...I'm driving my 65 like Travis to help change those stats in the 65'* favor ... might take a while though.

Til then..enjoy the fact that lower power equals less failures
There are factory freaks. Including a handful of 4T60'* that are over 300,000 miles and running fine. It'* rare, but it happens.

(I believe I'm hammering my differential with more torque at a more damaging lower rpm than you)
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Old Jun 26, 2006 | 02:01 PM
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Alrighty then...Let'* add Cheetah at over 165,000 and he rammed the castle gate to boot.

Personally it'* my feeling that if you put a brand new 60 and 65 side by side on the same vehicle (power wise) they would both be fairly equal with the 65 possibly lasting longer only because it would use the torque management programming to protect itself from abuse.

I've owned both S1 with the 60 and S2 with the 65. If anything the S2 65'* that I have ridden in and driven..have felt better and more solid over 100,000 miles than the S1'*.

Now...being aware of the differences in both motors and trans... it would be interesting if a side by side comparison could be done....
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Old Jun 26, 2006 | 02:42 PM
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Psst 00'* have 65 ? 170K and modded.

http://www.bonnevilleclub.com/forum/...ic.php?t=57478
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Old Jun 27, 2006 | 08:37 AM
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Wow.. We are all freaky

Originally Posted by McGrath
I'm looking to push my SSEI further but I know that even though the trans is perfect right now a rebulid is in order very soon with 150k+ on the clock.
he'* modded.
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Old Jun 27, 2006 | 09:17 AM
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Bill, you're pointing out the most extreme mileage 4T65E'* only. In a sense, you're skewing the data. I can list 2 or 3 4T60'* with high mileage for each one you listed, but that'* not the point.

From our experience here, and from external data sources (internet research and polling trans shops), the 4T60 is a much more reliable transmission, and in fact seems to be just as strong with the Series 2 mated to it. Note that we've had no abnormal rates of failure in the 96 SSEi'*. In fact, they go many miles.

There are many who believe the 65E was a move in the wrong direction. I'm one of them.

I think we've beaten this one to death. Don't you?
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Old Jun 27, 2006 | 09:19 AM
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Originally Posted by willwren
I think we've beaten this one to death. Don't you?
You bet
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