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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-18-2006, 03:20 AM   #1
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Default gear ratios

Are the gear ratios for a V6 cutlass supreme sl the same as an 88 SSE? I took the tranny frm the cutlass and put it in the SSE, I was told their were interchangeable. The car shifts fine with some adjustments I made to the TV cable and vacuum modulator valve, they just seem a little higher than what I have heard many of you who are experts here say they should be. I am installing a new tach to check and see if mine is reading correctly. I will chk your responses and give you my findings tomorrow.
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Old 08-18-2006, 12:44 PM   #2
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What year was the Cutlass supreme?

And there were diffrences in the gear ratio... in 88 the only ratio used with the SSE was the 2.97 Gear ratio...

In 89 you could have had the 2.97 or the 3.33 ratio...

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Old 08-18-2006, 01:04 PM   #3
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the cutlass was a 90. My bonne is an 88 sse. Could that be contributing to my abnormally high rpm shifts?
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Old 08-18-2006, 03:38 PM   #4
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Quote:
Originally Posted by jr's3800
What year was the Cutlass supreme?

And there were diffrences in the gear ratio... in 88 the only ratio used with the SSE was the 2.97 Gear ratio...

In 89 you could have had the 2.97 or the 3.33 ratio...
the 3.33 didnt start till 1990 in the sse
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Old 08-18-2006, 03:51 PM   #5
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ok,so what about the cutlass? is the tranny frm that car going to shift differently in my sse?
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Old 08-18-2006, 04:02 PM   #6
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Quote:
Originally Posted by spidey3479
ok,so what about the cutlass? is the tranny frm that car going to shift differently in my sse?
First things first.... Do you know what the RPO code is for the trans out of the Cutlass? What engine does the Cutlass have? If its a 2.8 or 3.1 you can bet it will be a 3.33...

Also does it have the 4 pin or 5 pin connector?

I would say the trans should work for you.... For the RPO it will have to ne an ME9 with codes MX0 and F79 or GX3...

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Old 08-18-2006, 11:47 PM   #7
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cutlass has a 3.1 and is the 4 or 5 pin related to the connector to what?
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Old 08-19-2006, 01:32 AM   #8
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Quote:
Originally Posted by spidey3479
cutlass has a 3.1 and is the 4 or 5 pin related to the connector to what?
The connector to the trans...

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Old 08-19-2006, 04:46 AM   #9
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The connector is a 5 pin, sorry, had to look,couldnt remember.
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Old 08-19-2006, 05:30 AM   #10
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Default Re: gear ratios

Question on the same line. Can the gear ratios be changed during rebuild?

Let say you start out with a 2.97 final drive ratio transmission, can the components that make the final drive ratio 3.33 be installed in it? Or is there something different in the transmission case that prevents it?

(Just thinking out loud.. might be interested in taking my 90 LE and giving it a quicker transmission ratio)
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