Trans finally went at just over 200k
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Thats a very good thing.. We used to love finding those on low mileage wrecker cars.... Those are the ones we looked for when scouting a trans.. 
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From: Waukesha, Wisconsin

So now for the bad news. My bro made it up with the car and it turns out it is a 94 LeSabre with a L27, but hes not sure what kind of car the GM rebuild came out of. The RPO code in the car is a F17 2.84 ratio.
My bro says that the trans could still be something else due to the smalltown backyard stuff the other guy'* at the shop do. So I need to know how to find out exactly what trans is actually in the car. What numbers do I need and where are they? Thanks.
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The Number you need will be on the trans Tag... The Plate with the info will be on the rear facing side of the Trans( Firewall ) and to the left of the Diff housing cover.. From there we will be able to tell you what Trans it is 
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From: Waukesha, Wisconsin

Ok went out and looked and wouldn't you know that the tag is gone
. The only other thing I see is a sticker with like a CO on it but the rest of it is ripped and gone. THere is a 772 stamped on the case by the exhaust crossover. So what makes these trannies not work if it' sthe wrong gear ratio? Is it in the tranny or the diff? can I just switch my diff into this trans? Man im kinda freaking out cause the bro just towed this thing over a thousand miles for nothing.
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Here is the deal...
If its a 2.84 Ratio Trans, it should have the 35 Drive and 35 Driven sprockets... Your 3.06 in the 95 will have the same 35 drive and 35 driven sprockets...
If this is the case and the trans in the Buick is a 2.84 then iirc you should be able to swap out the Diff.... If it is a 2.84 Trans, you will have to keep in mind that it has a 1420 Stall converter as compared to your 3.06'* 1897 stall converter... Also for the VSS reluctor wheel you'll need to pay attention to weather or not you have the 30 or 31 tooth.. Also the sun gear may have to be swapped out as well..
If you get the numbers off your 95'* trans we can tell you what you have.. Could possibly be 5BXW
I help answer what I can, but there are some far more knowledgeable people here when it comes to the trans..
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If its a 2.84 Ratio Trans, it should have the 35 Drive and 35 Driven sprockets... Your 3.06 in the 95 will have the same 35 drive and 35 driven sprockets...
If this is the case and the trans in the Buick is a 2.84 then iirc you should be able to swap out the Diff.... If it is a 2.84 Trans, you will have to keep in mind that it has a 1420 Stall converter as compared to your 3.06'* 1897 stall converter... Also for the VSS reluctor wheel you'll need to pay attention to weather or not you have the 30 or 31 tooth.. Also the sun gear may have to be swapped out as well..
If you get the numbers off your 95'* trans we can tell you what you have.. Could possibly be 5BXW
I help answer what I can, but there are some far more knowledgeable people here when it comes to the trans..

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From: Waukesha, Wisconsin

How noticable would it be with the ratio difference drivability wise between the 2.84 to 3.06. Does the trans shift crazy or what exactly happens? Does the computer try to do one thing and the trans do another, or is the trans on its own? I greatly appreciate your help.
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If you could find a 2.84 EPROM for a 95 Bonnie you'd be fine.... The L27 EPROM from the Buick will not work well... Trust me on that one and don't ask how I know...LMAO
With the 3.06 Chip and the 2.84 Trans you'd be pretty shifty
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With the 3.06 Chip and the 2.84 Trans you'd be pretty shifty

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From: Waukesha, Wisconsin

Ok looked at the tag and it is indeed the 5BXW code. We also took it for a ride and it worked fine :? but im sure its cause it is cold. Im not sure what to do next. I guess I have to say what would you do?
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From: burb of detroit. 2 miles north of 8 mile Rd.

if you cant find a 95 prom with the 2.84, you could have the original prom reflashed.
but you dont want to continue to drive the car with the pcm thinking it has a 3.06.
but you dont want to continue to drive the car with the pcm thinking it has a 3.06.


