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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 10-28-2004, 07:43 AM   #11
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Does it matter upon the gear ratio, in that would I have to swap out my ECU if by chance.. I got a GX3 tranny from a '91? The only thing my ECU controls is TCC lockup.. so I guess it could be possible, right?


-justin
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Old 10-28-2004, 09:58 AM   #12
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So long as it is not an "E" trans (available in some '91s) you would just need to swap the PROM, not the whole ECM. Is one byte that calibrates the speedometer/odometer.
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Old 10-28-2004, 10:32 AM   #13
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my question is why you continued to drive it even when you knew it was slipping that badly. It may have been saveable if it wasn't driven when it first started having problems.
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Old 10-28-2004, 02:46 PM   #14
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If you can't afford more then one socket, and don't have anyone to help, you better just swap em. Autotragics are not exactly easy, and as stated, an FSM doesn't make it easier. Owning an FSM doesn't mean you can fix anything.

Try the '91 tranny, hopefully you know the gear ratio, or it'* a 3.33...
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Old 10-28-2004, 03:43 PM   #15
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Quote:
Originally Posted by Custom88
my question is why you continued to drive it even when you knew it was slipping that badly. It may have been saveable if it wasn't driven when it first started having problems.
It wasn't bad, I could pull off 55mph at 3k. However, about 100ft before the hill I crapped out on, it was slipping so bad, I couldn't do anything about it. I knew it too. So, technically, I didn't drive it when it was slipping that badly. However.. I am at fault, because I should have just stopped, and forgotton about it when I first broke down. However, I didn't, and it is certainly a lesson learned.

If I get a GX3 tranny, I could take that tranny + the entire ECU [may as well, i'm sure i'd be able to find a use for it], remove just the PROM from the ECU, put that in my '89 ECU, bolt up the GX3, and go? That isn't too hard. But do I have to remove the engine, to get the tranny out? Nobody has answered this yet!


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Old 10-28-2004, 06:07 PM   #16
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I've heard of having to drop the whole subframe to get at the tranny in a first-generation Caddy STS. Hopefully the 3800 isn't like that.
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Old 10-28-2004, 10:48 PM   #17
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I've dropped the whole subframe of an H-body before, in grade 10 autoshop a couple of years ago, a 1986 LeSabre two-door, a car that our class was taking apart just for the hell of it.

I really don't see how it could be done without a hoist. We did it by taking/disconnecting the appropriate items, undoing the bolts, putting a (wheeled) stand/dolly under the subframe, hoisting the body up, and pulling out the subframe from underneath. Engine (LG3? Looked like one), transmission, front suspension/brakes, the whole deal. What'* the section that you speak of, jr? I forgetted, and all that'* in my head is that the whole subframe came out in one piece, without the possibility of seperating it for just the tranny
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Old 10-28-2004, 11:12 PM   #18
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Wow, this just gets worse and worse. So, i'm pretty much screwed no matter? I have to take this to a pro no matter what? Wow, this sucks.


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Old 10-29-2004, 12:14 PM   #19
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Cant you just remove the hood, take off all the bolts and wires and just lift the engne right out? I plan to do a tranny swap soon. Also, is it simple enough to take off the old trany and put in the new one to the sam engine? and another thing the tranny in my car is a 3.33 and the replacement is a 2.97 i think so can i switch the final drive ratios without taking the whole thing apart? ide liek to keep the 3.33 is i can.
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Old 10-29-2004, 10:21 PM   #20
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Just looking at mine, it *appears* that it could be possible to yank just the tranny from "up top"-doesnt look like my idea of fun though Reaching the bolts on the bottom might be a problem, maybe tilt the engine? I dont really want to find out soon!

Open, you live close enough to me. If you can get that thing out & buy all the parts your welcome to bring it over here & I'll help you rebuild it. Looking at the parts prices, its not going to be cheap though. In all honesty, a junkyard trans may be a better choice unless you really plan on keeping the car & driving it forever.
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