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Old 10-26-2014, 10:53 AM   #1
Danspeed1
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Easiest way to remove and replace transmission

Hello,

Continued to drive my 2005 Pontiac Grand AM after the transmission began to slip. Now it seems like the converter is locked up all the time. Incredibly slugish acceleration, and when I tap the brake it's not unlocking. On the highway it feels like the car is driving through a wind storm. I don't have the time to mess around with it so I am getting a low mile trans out of another grand am and probably going to buy a converter off ebay. I need to do this swap as quickly as possible. Whats the fastest way to get the old one out and the new one in. Is it best removing it from the bottom of the car or taking it out with the engine from the top. I am not doing anything other than a transmission R&R so just need to know the most painless way to get this done.

Dan
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Old 10-26-2014, 11:33 AM   #2
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do you have a engine support bar if you drop it out the bottom? I've only pulled engine/trans as 1 piece but out the top is pretty easy also if you drop it from the bottom you will need an alignment after

I've done it both ways on N-bodys, 1st time out the bottom and the 2nd and 3rd time out the top...
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Old 10-26-2014, 01:02 PM   #3
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Easiest way?
Pay a trusted mechanic to do it.
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Old 10-26-2014, 08:43 PM   #4
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I'd rent an engine hoist and pull the engine and trans out the top as one unit. That way you don't have to undo the entire front suspension and drop the sub-frame and need an alignment afterward. All you need to do is remove the hood to make it easier.

Either way there is a lot to disconnect and fluids to drain etc. It's a full day job even if you've done it before and know what you're doing. I'd give yourself a full weekend to do it.
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Old 10-26-2014, 09:10 PM   #5
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Originally Posted by AaronGTR View Post
I'd rent an engine hoist and pull the engine and trans out the top as one unit. That way you don't have to undo the entire front suspension and drop the sub-frame and need an alignment afterward. All you need to do is remove the hood to make it easier.

Either way there is a lot to disconnect and fluids to drain etc. It's a full day job even if you've done it before and know what you're doing. I'd give yourself a full weekend to do it.
I don't have an engine support bar, but I do have an engine hoist. Sounds like it maybe easier to just pull the motor and trans as one, and then disassemble it hanging.

Thanks for the tips,

DG
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Old 10-26-2014, 11:23 PM   #6
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Nevermind the engine support; if a two-post lift and a trans jack is not available, it is faster to pull the complete power train from the top.
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Old 10-27-2014, 04:04 AM   #7
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Also if you want to make it easier I suggest investing a couple bucks on a engine leveler if you don't already have one
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Old 11-22-2015, 10:20 PM   #8
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Easiest way?
Pay a trusted mechanic to do it.
I completely agree. I know its been over a year. I guess i got really lucky. Back in October with just under 220k miles on my Grand Am, 4 friends and I decided we were going to take a trip in the car. I guess all the added weight caused the car to run a little hotter than normal. We got stuck in stop and go traffic and after about an hour first gear was gone. We pulled over and gave the car a break. After it cooled off a bit we got first back but it was very slippery. I decided about 3 weeks ago I was going to just get this done. I purchased a salvage trans out of a car with 34k miles on it. For whatever reason I decided rather than go out the top I was going to take it out the bottom. I work a lot so I have about 4 working days in the car, and about 40 hours. Ran in to every issue imaginable. Just to give you a short list.

Rusty Brake Lines needed replacing
Had to replace thermostat, so got that done
I broke the steering shaft and had to pull one from a junk yard car
Rusty Bolts
Bad Tie Rods

I'm sorry to say I should have let the car go. I have everything back together except the brakes. I am finishing that on Thanksgiving Day. I hope the car runs and drives as it should after this is done... I will not be doing it again.

Dan
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Old 11-29-2015, 11:14 PM   #9
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Well,

New Trans is in and car is back on the road. Drives like new, I couldn't be happier. The only question I had was in regard to TAPS. I read somewhere that after a Trans replacement you should reset the adaptive shifting to relearn the new trans. How Important is this? How do i accomplish this?

Thanks,

Dan
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Old 12-05-2015, 02:31 PM   #10
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Not very important. It might make a small different in driving feel, but most people won't really notice. The only way to reset it is with a complete reflash of the PCM (powertrain control module). Most people can only get that done at the dealership, so you'd be looking at forking over some more cash to get it done.
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Old 09-07-2016, 08:31 PM   #11
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I lurk. Not sure why i'm even updating this thread by 232K still running strong, and shifts like a new car. I've slowed down driving it this summer. I managed to get all the toys out on the road so I have been enjoying those but when winter hits the heavy mileage will be back.

DG
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Old 09-20-2016, 11:19 PM   #12
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It's nice to hear you got so much mileage out of your tranny. I have 110K on my 99 and i switched to Mobile 1 tranny fluid at 55K so i'm hoping i don't have any problems with mine. I am really babying it trying to make it last so i can put all the guts from it in a rust free body.
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Old 06-04-2019, 07:07 PM   #13
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293K.... I'm almost at 300K! Been driving it 60 miles each way everyday.
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Old 06-05-2019, 08:05 AM   #14
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Nice work. Hope it lasts another 100K plus
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Old 06-16-2019, 07:55 PM   #15
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293K.... I'm almost at 300K! Been driving it 60 miles each way everyday.
Awesome itís good to get that kind mileage out of one of these cars
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