Ozzy's LQ9 LS swap thread for his 84 Trans Am - Third Generation F-Body Message Boards


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Ozzy's LQ9 LS swap thread for his 84 Trans Am

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Old 08-07-2016, 05:47 PM   #1
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Ozzy's LQ9 LS swap thread for his 84 Trans Am

Yes, I titled t his in the third person...lol

Very early stages of it but since I need a full rebuild anyway, I decided to take the LS plunge instead of building another SBC.

For an engine I will be looking for a lower miles LQ4 or LQ9 with cable throttle body come tax return season. Until then I will be getting the smaller necessary swap parts purchased.

So today I have bought the Spohn LS motor mounts and matching transmission mount.

Next purchase will be an LS6 intake manifold.

It's a long way to the finish line.

Last edited by Ozz1967; 02-14-2017 at 12:08 PM.
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Old 08-13-2016, 09:13 PM   #2
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Re: It has begun....my LS swap thread

Always fun, I had a 305 with a bad carb/fuel system, leaky valve seals and who knows what else. Options were a built SBC (likely a 383) but then I stumbled in to this horrendous section of the forum and ended up with an LS1.

I enjoyed building the harness, I suggest giving it a go and learning!
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Old 08-13-2016, 09:29 PM   #3
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Re: It has begun....my LS swap thread

How hard was modifying and matching the engine harness to the car? That's the only part of the swap that scares me.
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Old 08-14-2016, 11:13 AM   #4
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Re: It has begun....my LS swap thread

It really was pretty simple, it's only a handful of wires. I had pocket make me a small fuse/relay block to my specs and away I went.
I used speedhut gauges, all digital and programmable so that also simplified things for me... For the price they can't be beat for custom built gauges.
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Old 08-14-2016, 10:08 PM   #5
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Re: It has begun....my LS swap thread

Swapping to the ls and wiring seems overwhelming at first but once you start getting into it you will see its really not hard at all.Consider the engine side standalone and doesnt need to tie into the car other than main power,ignition ..starter wire and ground.Next..was the ecu sending signal to the fuel pump relay,fan relays and you have a running ls basically.Now making things like gauges ..cruise control, ac etc..thats where time is spent.But making the motor run can be done easily.Take your time and it will come together.
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Old 08-24-2016, 04:58 PM   #6
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In other threads you've talked about keeping your current TH700. Have you decided how you're going to operate the TV cable with the LS throttle body?
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Old 08-24-2016, 06:36 PM   #7
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Re: It has begun....my LS swap thread

I picked up a swap harness from Pocket on this website and received an excellent product that was tailored to my '92 Z28 and when I'm done should be very reliable. I decided to go with Jon's new harness rather than build a new one due to the expense of acquiring the wiring and various components to do the job. You would not go wrong with his product. I was not willing to reuse the old 25 year old wiring for reliability reasons.
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Old 08-24-2016, 07:17 PM   #8
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Re: It has begun....my LS swap thread

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In other threads you've talked about keeping your current TH700. Have you decided how you're going to operate the TV cable with the LS throttle body?
Unfortunately the bowtie overdrive kit is only designed for the early cable throttle bodies. I've found several promising ideas, one from a member on Las1tech if he responds to my pm there. Saysr he has a template I hope to get a copy of.

I also like the idea I saw of putting it on the gas pedal but I've no idea honestly how to make that work.

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Old 08-24-2016, 07:19 PM   #9
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Re: It has begun....my LS swap thread

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I picked up a swap harness from Pocket on this website and received an excellent product that was tailored to my '92 Z28 and when I'm done should be very reliable. I decided to go with Jon's new harness rather than build a new one due to the expense of acquiring the wiring and various components to do the job. You would not go wrong with his product. I was not willing to reuse the old 25 year old wiring for reliability reasons.

I have messaged pocket both here and LS1tech, just waiting for him to get back to me.
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Old 08-24-2016, 07:31 PM   #10
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Re: It has begun....my LS swap thread

Picked up my motor yesterday. It's an LQ9 from an 04 Escalade. Looks like garbage but it spins freely with the breaker bar on the crank so that's promising!



Picked up my LQ9 yesterday!
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Old 08-24-2016, 07:36 PM   #11
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Re: It has begun....my LS swap thread

Here is the LS6 intake with fuel rails, cable throttle body and injectors.



LS6 intake with cable throttlebody, fuel rails and injectors
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Old 08-24-2016, 07:38 PM   #12
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Re: It has begun....my LS swap thread

So the Spohn transmission cross member is the wrong one but BMR sells one with a torque arm relocation bracket that I can use since the stock cross member will not.
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Old 08-24-2016, 07:51 PM   #13
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Re: It has begun....my LS swap thread

Great start!
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Old 08-25-2016, 06:21 AM   #14
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Re: It has begun....my LS swap thread

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I have messaged pocket both here and LS1tech, just waiting for him to get back to me.
He always recommends email.

Swap is starting to come together!
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Old 08-25-2016, 11:51 AM   #15
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Re: It has begun....my LS swap thread

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He always recommends email.

Swap is starting to come together!
I don't have his email...I'll check his profile.
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Old 08-25-2016, 06:06 PM   #16
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Re: It has begun....my LS swap thread

Did you get the PCM with the engine? It appears a cable cutter was used on the harness (hate it when people do that).

You may want to convert to throttle by cable (aka DBC). Would make the TH700 TV cable much easier.

Or get an LS 4L60E.
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Old 08-25-2016, 07:04 PM   #17
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Re: It has begun....my LS swap thread

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Did you get the PCM with the engine? It appears a cable cutter was used on the harness (hate it when people do that).

You may want to convert to throttle by cable (aka DBC). Would make the TH700 TV cable much easier.

Or get an LS 4L60E.

It was hacked when they pulled it from the truck. People just cut stuff when they pulled the other accessories.


I did get an ecm. It's from an 06 1500, not the same vehicle as the engine.

As for cave vs drive by wire I have an LS6 intake with cable throttle body I plan on using.
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Old 08-25-2016, 07:09 PM   #18
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Re: It has begun....my LS swap thread

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Did you get the PCM with the engine? It appears a cable cutter was used on the harness (hate it when people do that).

You may want to convert to throttle by cable (aka DBC). Would make the TH700 TV cable much easier.

Or get an LS 4L60E.

It was hacked when they pulled it from the truck. People just cut stuff when they pulled the other accessories.


I did get an ecm. It's from an 06 1500, not the same vehicle as the engine.

As for cable vs drive by wire I have an LS6 intake with cable throttle body I plan on using. I will have to figure out geometry and how to run it under the throttle bracket because I want to keep my cruise.



Last edited by Ozz1967; 08-25-2016 at 07:45 PM.
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Old 09-16-2016, 11:24 AM   #19
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Re: It has begun....my LS swap thread

06 PCM will be green/blue and well into the DBW years. Doubtful it will run an IAC stepper motor

Sell that box and find a 99-03 0411 PCM. Doesnt have to be LS either, 01-02 S10s and similar with the V6 all used the 0411
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Old 09-16-2016, 09:40 PM   #20
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Re: It has begun....my LS swap thread

I run a 99 5.3 with cable throttle body. I also run a 2004R which is TV cable operated trans, as stated their is no provision for TV trans. I welded a tab on the TB for the TV cable took 5 min. Their is an arc and geometry that needs to be considered when getting the arc right.
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Old 09-16-2016, 10:25 PM   #21
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Re: It has begun....my LS swap thread

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I run a 99 5.3 with cable throttle body. I also run a 2004R which is TV cable operated trans, as stated their is no provision for TV trans. I welded a tab on the TB for the TV cable took 5 min. Their is an arc and geometry that needs to be considered when getting the arc right.
If I stick with the 700R, I've been told by some over on LS1tech that I can use the cruise control connector on the throttle. Not sure how actually true this is. Do you have a picture of how yours is welded up? I'll just use it as a template for where to add a tab. I'd like to eventually use a cruise on it as well but may need to switch to a 4l60e for that.
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Old 09-17-2016, 08:18 AM   #22
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You cannot use the cruise stub, totally different spot
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Old 09-17-2016, 04:05 PM   #23
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Re: It has begun....my LS swap thread

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You cannot use the cruise stub, totally different spot
I have seen some pictures of it. Wish there was template I could find. I could probably get something and rivet it in place (don't own a welder here and I've never been much for fabrication on my own). I would just need to find a way to mount it under the other two brackets.
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Old 09-18-2016, 07:48 AM   #24
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Old 09-18-2016, 09:38 AM   #25
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Re: It has begun....my LS swap thread

Yes one of the companies makes a bolt on bracket for the LS1 TBs that allows a TV cable to be attached. It was expensive for what it was tho. Hence why I made my own. I'm sure u could fab up a cruise control mount. Not welding is a huge disadvantage tho.




Here is what I did. Drilled the bracket for more than 1 hole so I had some adjustment/fine tuning. I'm using a lokar 2004R TV cable which has its own ball stud/bolt and makes it super easy... Just need a hole to bolt the ball stud down. So far it's worked great, if anything it's alittle on the aggressive side. But I tried to get the math right with the previous posts diagrams.
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Old 09-19-2016, 08:41 PM   #26
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Re: It has begun....my LS swap thread

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Yes one of the companies makes a bolt on bracket for the LS1 TBs that allows a TV cable to be attached. It was expensive for what it was tho. Hence why I made my own. I'm sure u could fab up a cruise control mount. Not welding is a huge disadvantage tho.




Here is what I did. Drilled the bracket for more than 1 hole so I had some adjustment/fine tuning. I'm using a lokar 2004R TV cable which has its own ball stud/bolt and makes it super easy... Just need a hole to bolt the ball stud down. So far it's worked great, if anything it's alittle on the aggressive side. But I tried to get the math right with the previous posts diagrams.
that's good work there. The company is Bowtie Overdrives and yes the kit is expensive, but it's also plug and play. IT also only works on your style cable throttlebody. On the later style throttlebodies, we don't have the circular back piece.. Ours is just a half moon without that part.
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Old 09-19-2016, 09:11 PM   #27
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Re: It has begun....my LS swap thread

Ahh didn't even realize the difference in the pics. Figure the way I did mine still applies. I believe the steel was 1/2-3/4" wide and 1/8" thick. I got the cruise box off the truck when I got the motor and I don't recall the style of hookup or if it was even cable? If so it might have hooked up to the TB already and used the stud originally there. Did the 4L60E have a cable hookup? Not like a TV but more like a throttle position so the trans electronics could provide shift points etc? Or was it all just ECM based? I gotta find that box and take a look.
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Old 09-19-2016, 09:38 PM   #28
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Re: It has begun....my LS swap thread

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Ahh didn't even realize the difference in the pics. Figure the way I did mine still applies. I believe the steel was 1/2-3/4" wide and 1/8" thick. I got the cruise box off the truck when I got the motor and I don't recall the style of hookup or if it was even cable? If so it might have hooked up to the TB already and used the stud originally there. Did the 4L60E have a cable hookup? Not like a TV but more like a throttle position so the trans electronics could provide shift points etc? Or was it all just ECM based? I gotta find that box and take a look.
The style of cruise was dependent on the type of throttle body. Your throttle body there has the cruise hook up. It's the **** on the top that sticks out to the right. Cruise cable hooks on that.

4l60e was all electronic ECM based.
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Old 12-07-2016, 07:03 PM   #29
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Re: It has begun....my LS swap thread

I have been saving up and finally have my oil pan of choice! Thank you Mast Motor Sports!










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Old 12-12-2016, 05:27 PM   #30
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I have been saving up and finally have my oil pan of choice! Thank you Mast Motor Sports!
I've been eyeing that pan since before they released it, spendy! Want it for my second gen....
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Old 02-10-2017, 06:11 PM   #31
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Re: It has begun....my LQ9 LS swap thread

I sort of wish I would've went LS now that I'm pretty much finished with my SBC build. But as you said in another post, in this neck of the woods folk want an arm and a leg for LS motors.

Good luck with the build! I'm excited to see how it goes.
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Old 02-10-2017, 06:52 PM   #32
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Re: It has begun....my LQ9 LS swap thread

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I sort of wish I would've went LS now that I'm pretty much finished with my SBC build. But as you said in another post, in this neck of the woods folk want an arm and a leg for LS motors.

Good luck with the build! I'm excited to see how it goes.
thanks I appreciate it! I have a fee more pictures to post here soon.
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Old 02-10-2017, 07:03 PM   #33
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Re: It has begun....my LQ9 LS swap thread

So it's slowly coming together I thought I had lost the thread I couldn't find it lol...guess I need to post more. Anyway, here are the measurements from the mast oil pan.
The oil pan.
Front sump shallow measurement

Sump length front to back.

Sump depth
As compared to the fbody pan depth of 5.5"
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Old 02-10-2017, 07:13 PM   #34
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Re: It has begun....my LQ9 LS swap thread

Pulled the old oil pan. Everything looks really good for sitting in a junk yard for 6+ years. I do need to figure out how to clean the block for paint while leaving the heads on. I don't want to pull them if I do t have to.



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Old 02-10-2017, 07:18 PM   #35
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Re: It has begun....my LQ9 LS swap thread

Flex plate came in today. SFI approved anddual bolt pattern so if/when I swap to a 4l60e I can without changing flex plates.

TCI Automotive 399753 LS1 Engine to GM Auto Transmission Adapter
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Old 02-10-2017, 07:25 PM   #36
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Re: It has begun....my LQ9 LS swap thread

Bowtie Overdrive TV made Ez to run my 700r4.

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Old 02-14-2017, 09:29 AM   #37
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Pulled the old oil pan. Everything looks really good for sitting in a junk yard for 6+ years. I do need to figure out how to clean the block for paint while leaving the heads on. I don't want to pull them if I do t have to.
As far as cleaning the block. Iv always had great luck with using dawn dish soap. I usually soak it down a couple of times through the week then again on scrubbing day. Couple of toothbrushes ( and a few beers) and it cleans up nice.
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Old 02-14-2017, 10:22 AM   #38
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Re: It has begun....my LQ9 LS swap thread

Im glad you are doing this swap. Ive been thinking of what the next step for my car is, and lq4 is a good possibility. But like you, I want to keep my existing 700r4. Im interested in keeping up with your thread. Im sure it will be a strong influence on me.
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Old 02-14-2017, 11:29 AM   #39
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Re: It has begun....my LQ9 LS swap thread

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As far as cleaning the block. Iv always had great luck with using dawn dish soap. I usually soak it down a couple of times through the week then again on scrubbing day. Couple of toothbrushes ( and a few beers) and it cleans up nice.
how does that work for paint bubbles and rust? Suppose i'll need to break out a wire brush/wire wheel on my drill for it.
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Old 02-14-2017, 12:02 PM   #40
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Re: It has begun....my LQ9 LS swap thread

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I sort of wish I would've went LS now that I'm pretty much finished with my SBC build. But as you said in another post, in this neck of the woods folk want an arm and a leg for LS motors.

Good luck with the build! I'm excited to see how it goes.
Thanks. Yeah, i was originally going to do a 406sbc using a new Dart Block but was talked into an LS swap. The only running LQ9 I could find after 3 months of looking was down in Chicago and i'm not driving 9 hours for a dang motor. Cost as much in fuel and time as I wound up playing for one here. Hind-sight being what it is...i probably should have made the trip. Anyway, the more parts I get the more excited I am. Now, I need to get the old motor out so I can fix some wiring and pull the old wiring and clean up the engine bay.
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Old 02-14-2017, 12:05 PM   #41
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Re: It has begun....my LQ9 LS swap thread

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Im glad you are doing this swap. Ive been thinking of what the next step for my car is, and lq4 is a good possibility. But like you, I want to keep my existing 700r4. Im interested in keeping up with your thread. Im sure it will be a strong influence on me.
Edit -- I just read your sig and you have a pro-built 700...you're fine lol..
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Old 02-14-2017, 12:15 PM   #42
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Re: It has begun....my LQ9 LS swap thread

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Im glad you are doing this swap. Ive been thinking of what the next step for my car is, and lq4 is a good possibility. But like you, I want to keep my existing 700r4. Im interested in keeping up with your thread. Im sure it will be a strong influence on me.
biggest issue I see going forward will be the trans cross member and exhaust. I'm probably going to need a custom bat-wing style built with both 700 and 4l60e mounting points.
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Old 02-14-2017, 12:16 PM   #43
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Re: Ozzy's LQ9 LS swap thread for his 84 Trans Am

that TV made EZ i like over $100 right?

I used oven cleaner on my 5.3, had 150k worth of crap on it, cooked oil etc and I sprayed it down and hit it with a hose. Alittle scrubbing and it got most of it off. Got the oven cleaner at the dollar store and bought a few cans.

Now I would have used a pressure washer that I didnt have at the time which would have made it much easier. But From what Ive read the high pressure steam cleaning is the best.
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Old 02-14-2017, 12:24 PM   #44
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Re: It has begun....my LS swap thread

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I've been eyeing that pan since before they released it, spendy! Want it for my second gen....
I have the measurements posted now on this thread so you can see how it compares to some of the others.
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Old 02-14-2017, 01:08 PM   #45
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Re: Ozzy's LQ9 LS swap thread for his 84 Trans Am

Out of curiosity, why not just dismantle it and bring it somewhere to get cooked\cleaned? My guy here in Brainerd charges very little for just cleaning a block. As long as they don't bead blast it, there's no worry about hurting the bores, etc.
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Old 02-14-2017, 01:14 PM   #46
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Re: Ozzy's LQ9 LS swap thread for his 84 Trans Am

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Out of curiosity, why not just dismantle it and bring it somewhere to get cooked\cleaned? My guy here in Brainerd charges very little for just cleaning a block. As long as they don't bead blast it, there's no worry about hurting the bores, etc.
Initially, I didn't want to pull the motor apart because it should be in good running condition and the less I take apart the better chance it has of staying leak free and running good. Pulling it apart means new rings, seals, bearings etc because not going back with old at that point.

However, since I finally broke a bolt I don't think I can get out without help because it's broke flush in the head (Manifold bolt), I may just take it in.
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Old 02-14-2017, 01:15 PM   #47
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Re: Ozzy's LQ9 LS swap thread for his 84 Trans Am

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that TV made EZ i like over $100 right?
I'ts $175 shipped new. I found someone local here in MN that had one that saved me $75 on it shipped to my house.
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Old 02-14-2017, 01:46 PM   #48
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Re: Ozzy's LQ9 LS swap thread for his 84 Trans Am

Broken exhaust manifold bolts are rotten. Best of luck, sir!
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Old 02-14-2017, 01:52 PM   #49
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Re: Ozzy's LQ9 LS swap thread for his 84 Trans Am

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Broken exhaust manifold bolts are rotten. Best of luck, sir!
yeah, thanks. The bolt head didn't snap off on this one, the whole thing broke flush with the head and I don't trust myself with an easy out not to mess up the aluminum head.

Last edited by Ozz1967; 02-14-2017 at 02:15 PM.
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Old 02-15-2017, 11:32 AM   #50
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Re: It has begun....my LQ9 LS swap thread

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Flex plate came in today. SFI approved anddual bolt pattern so if/when I swap to a 4l60e I can without changing flex plates.

TCI Automotive 399753 LS1 Engine to GM Auto Transmission Adapter
You'll have to take the hub adapter out and get new mount bolts to the crank in order to use it with an LS-type 4L60E.
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