Registry 8x Series V8 Swaps (4 Viewers)

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TLC94LS said:
Stick Gotcha's
1. Tap and helical the bolt holes on marks adapter that the T-case bolts to.
2. Selkirk aka Land Cruiser shop engine mounts w/ 4L80 will require drive shaft modification.
3. Marks adapter does not line up the Hi/Lo shifter mounts.
4. Get a dakota digital box for tach and PRND light and Neutral Safety Switch integration.

Add to the sticky - My poor assumption that using a marks adapter, since the transmission mounts to what I thought was about the same locations. I now need to get my driveshafts lengthened in the rear and shortened in the front.

So, I went with Land cruiser shop's aka Selkirk's engine mount and transmission crossmember. I incorrectly assumed this combo with a marks adapter was placing the t-case about in the stock location. That is not the case, I spoke with them on the phone, their mounts are made for ease of engine installation, which is 100% correct, stock GM truck accessories fit fine, no issues stock a/c, power steering etc.

This is not a knock on Selkirk engine mounts, I think they worked perfectly, every modification is most likely going to have a give and take. For me I wanted bolt on accessories, as I do not have a welder or welding skills. The idea of grinding off the old engine mounts and welding new ones, didn't seem like something I wanted to tackle. Trying to center or place a motor in from scratch, seemed a bit pass my experience level. I know everyone has an opinion on how to do these swaps. My only point is to make this aware for anyone else weighing their options. Selkirk referred me to Tom Woods 4x4 drive shafts for replacements. Not sure if I will go with new ones, or see if there are actually any driveshaft shops still in business. Joke is on me for thinking I was down to wiring and knuckle re-build!
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Lq4, 4l80, I was planning on running the Selkirk crossmember with cruisermatts mounts. Does anyone see me having issues doing that? Will it cause drive line issues? If I remember correctly the Selkirk crossmember shifts everything over a tiny bit. Will this cause my engine and trans to be crooked down the tunnel? Am I overthinking this? lol I forget why I even bought the Selkirk crossmember at this point.

I still have my SLEE skid plate that acts as a factory crossmember so I can still use that instead of the crossmember if needed.
 
FlyinFaded said:
Sorry guys. I have been reading this thread for hours and I can’t find anything that anyone has done to adapt the later style hi/lo shifter to the marks 4l80 t case adapter. I know it was meant for the earlier years shifter. And I see what 808keith did with the earlier style shifter. My question and thought is to create an oversized plate that bolts to the adapter and then have the shifter bolt to the plate outside of the adapter. But that wont work because the shifter’s base covers the holes on the adapter.

Should I shell the cash out for a 94 model shifter?? I’d rather not

View attachment 3961442

View attachment 3961443
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Ran into an issue like your situation. Won’t work. Had to ghettoly fabricated an aluminum plate. I used a 92 shifter, 4l60e transmission. My Lc is a 1997.

IMG_9349.webp
 
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wiynwiyn said:
Ran into an issue like your situation. Won’t work. Had to ghettoly fabricated an aluminum plate. I used a 92 shifter, 4l60e transmission. My Lc is a 1997.

View attachment 3961506
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Yea. Finis posted your build thread. I’m going through it as we speak. Learning a lot. I’m currently trying to remember why I bought the Selkirk trans crossmember and going with cruisermatts engine mounts. I think it was to help create more room in the trans tunnel
 
FlyinFaded said:
Yea. Finis posted your build thread. I’m going through it as we speak. Learning a lot. I’m currently trying to remember why I bought the Selkirk trans crossmember and going with cruisermatts engine mounts. I think it was to help create more room in the trans tunnel
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I talked to them about their rear crossmember since I'm putting in a L96/4L80e. It's meant to work with their bolt on motor mount kit, it pushes the engine forward so you have about an arms width between the firewall and the engine. It doesn't leave any room for a mechanical fan if you were planning on using one.
 
LT said:
I talked to them about their rear crossmember since I'm putting in a L96/4L80e. It's meant to work with their bolt on motor mount kit, it pushes the engine forward so you have about an arms width between the firewall and the engine. It doesn't leave any room for a mechanical fan if you were planning on using one.
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I wasn’t going to use one. Well damn. I didn’t think it pushed it forward but more to the side. I’ll have to go mess with it tomorrow. I have my stock trans and engine in still. I know it won’t bolt up to it but it’ll give me and idea of what it’s going to do to the swap placement. If it pushes it forward then I don’t want to use it because I’d rather not have to change my driveshafts. Again.
 
tmxmotorsports said:
It made to work with mark's adapter and mark's adapter engine mounts and I doubt that works without modifications just saying don't expect it to just bolt right up and work.
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lol got it. Well I opened my box of parts again today. And my adapter didn’t even come with a plate. So I’m forced to fab one regardless haha
 
My angles earlier were referenced (zeroed) to the frame. If you can't trust your fully boxed frame to be straight (relative to the body) with the vehicle sitting on level ground, then you got bigger issues.

I originally was going to use the Selkirk offroad crossmember as well and bought it. I thought I could modify it for my use. Nope. I still have it if anyone wants to buy it. 😁

The Selkirk crossmember shifts the engine way to the US passenger side and forward, and it does assume using their mounts and not @cruisermatt mounts.

IMHO, it shifts the engine too far because you will run into oil pan/diff clearance issues, thus the reason for the mandatory lift. If your vehicle is a mall crawler, then this is probably fine. I will call it out though if I see it on a LS swapped vehicle looking to sell. 😄

1754051249046.webp


Here is my first attempt at using their crossmember. Not even close...
1754050932292.webp

This is with Mark's 4WD mounts in the stock location with a 6L90e, which I think is slightly shorter than a 4L80e.

I later moved the engine mounts 1.25" forward and 1/2" to the US passenger side to gain clearance for the type II steering pump, found on gen IV/V motors. The return on those pumps point straight at the frame rail.

I ended up just drilling new holes in a DeltaVS crossmember. I ended up very close to the original Toyota mounting holes, just to the passenger side 0.5" since I did move the motor in that direction and to the back about 0.25-0.5". The other holes, down and to the right in the picture, is where DeltaVS thinks a LS swapped motor should be...way to the US driver's side and forward.

1754052103553.webp


BTW, I am running a mechanical fan, which is 100% the way to go with these swaps.

Hope that helps.
 
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NeverFinis said:
My angles earlier were referenced (zeroed) to the frame. If you can't trust your fully boxed frame to be straight (relative to the body) with the vehicle sitting on level ground, then you got bigger issues.

I originally was going to use the Selkirk offroad crossmember as well and bought it. I thought I could modify it for my use. Nope. I still have it if anyone wants to buy it. 😁

The Selkirk crossmember shifts the engine way to the US passenger side and forward, and it does assume using their mounts and not @cruisermatt mounts.

IMHO, it shifts the engine too far because you will run into oil pan/diff clearance issues, thus the reason for the mandatory lift. If your vehicle is a mall crawler, then this is probably fine. I will call it out though if I see it on a LS swapped vehicle looking to sell. 😄

View attachment 3961566

Here is my first attempt at using their crossmember. Not even close...
View attachment 3961564
This is with Mark's 4WD mounts in the stock location with a 6L90e, which I think is slightly shorter than a 4L80e.

I later moved the engine mounts 1.25" forward and 1/2" to the US passenger side to gain clearance for the type II steering pump, found on gen IV/V motors. The return on those pumps point straight at the frame rail.

I ended up just drilling new holes in a DeltaVS crossmember. I ended up very close to the original Toyota mounting holes, just to the passenger side 0.5" since I did move the motor in that direction and to the back about 0.25-0.5". The other holes, down and to the right in the picture, is where DeltaVS thinks a LS swapped motor should be...way to the US driver's side and forward.

View attachment 3961570

BTW, I am running a mechanical fan, which is 100% the way to go with these swaps.

Hope that helps.
Click to expand...
Yea it does help. Sounds like I’m finding a stock crossmember or I’m using my slee skid plate for mock up. I’m going the electric fan route at this point. I can always go to mechanical later if it’s. It working out.
 
tmxmotorsports said:
It made to work with mark's adapter and mark's adapter engine mounts and I doubt that works without modifications just saying don't expect it to just bolt right up and work.
Click to expand...
Yup. It was an arduous, exciting journey for me. You have to be creative and know how to solve occurring challenges. Thanks to this thread and others who answered many questions.
 
FlyinFaded said:
lol got it. Well I opened my box of parts again today. And my adapter didn’t even come with a plate. So I’m forced to fab one regardless haha
Click to expand...
Mine did not come with a plate either and my tcase shifter is a 96. I already assumed from what I've seen from others I will be making my own plate adapter to get the shifter in the correct location even with an early style one with the correct bolt pattern.
 
Hey guys. Maybe a dumb question. I’m going through Marks4wd install instruction to mate my 4l80 to the adapter and my t case. It says apply a small smear of silastic to the mating surfaces with the o-rings. Wtf is silastic? Are we creating a gasket here on the 2 mating surfaces? Do I use permatex rtv silicone? Do I use grease?
 
FlyinFaded said:
Hey guys. Maybe a dumb question. I’m going through Marks4wd install instruction to mate my 4l80 to the adapter and my t case. It says apply a small smear of silastic to the mating surfaces with the o-rings. Wtf is silastic? Are we creating a gasket here on the 2 mating surfaces? Do I use permatex rtv silicone? Do I use grease?
Click to expand...

1995 Land Cruiser LS Swap​

This youtube video on installing the mark's adapter was helpful for me. I used ultra black rtv.
According to Ai, Silastic is a trademarked name for a type of silicone elastomer, known for its flexibility and inertness. It's often used in medical implants, mold making, and various other applications where a flexible, durable material is needed. By the way, others advice to replace the less robust allen bolts with hex bolts.
 
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wiynwiyn said:

1995 Land Cruiser LS Swap​

This youtube video on installing the mark's adapter was helpful for me. I used ultra black rtv.
According to Ai, Silastic is a trademarked name for a type of silicone elastomer, known for its flexibility and inertness. It's often used in medical implants, mold making, and various other applications where a flexible, durable material is needed. By the way, others advice to replace the less robust allen bolts with hex bolts.
Click to expand...
Ok so we are making a gasket? That’s the point of using it. Hmm didn’t see any post on switching the hardware. Only on helicoiling the threads which is done. I will get some more hardware. That’s easy
 
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