4l80E/NP205 (Yes, another one)

[Gobuffalo]

Here's where I cut the lower or main piece. I used a sawsall.

[Gobuffalo]

Had to make adapter plates. You can buy these from Holley for $90.00. Or I went to my local metal supply and bought 2, 6x6x1/4" plates for $5.00. An hour later with some cutting, grinding, drilling, tapping and painting, this is what you get. (Let the paint dry over night) I used the old LS mounts and the stock, poly small block mounts for patterns.

[Gobuffalo]

All bolted together.

[Gobuffalo]

If you place this in the factory small block mounting holes in the frame (the rear ones) one of the LS holes lines up. There is plenty of room for the starter and A/C.

Now for $20.00 in 1" X .120 DOM tubing and a little time with a bender and welder, I will tie the 2 sides together. Paint.

Sure beats $400.00 for a crossmember kit. Now I just have to hope it holds up while 4 wheeling.

[jjzepplin]

Very slick.

[Myers horsepower]

Watching. I'm wanting to put a 4l80e in my 1990 V3500 truck.

[Gobuffalo]

Finished lower half of crossmember.
After powder coating I'm into this for $65.00 and 8 hours of my time

[ZacharyDouglas1992]

Sorry for falling asleep on this everyone. It still will be done, eventually. The truck is currently completely stripped and being restored. One thing led to another and now it is being painted, power doors, motor rebuild, serpentine, fuel injection, the whole 9. I should probably start a build thread for it, and when I get to the point of installing my 4l80 I will post the details of that process here!

[Pano]

Thanks for this thread. I to am also doing a 4L80e swap and have been searching for all the details so when I start I hope to turn it around quickly. It seems everyone has some variation.

I have an 87 v2500 TBI 350/400/208. I bought a TBI 454/4L80e out of a low mileage 1991 motorhome. I have the computer and complete harness. The harness has some sort of trans module but I havent had the time to study it yet. I havent seen any 208s used with the 4L80 so it looks like I may need to pick up a 205 tcase.

[special-K]

This is a great thread. I picked up a late TH400/NP205 I would like to adapt to 4L80E

[324matt]

Watching

[Orange Crate]

I know this thread is five months old but I thought maybe someone might be interested in an option that I didn't see mentioned here. I have not used these people for any adapters (my NV4500 bolts directly to my round 6 bolt NP205) but I thought this might help someone else out.

http://www.pirate4x4.com/forum/motor...ngagement.html

I think the Trail Tech Fad web site is under construction but at least it points you in the right direction if you are looking at an alternative for an adapter.

[heath_mceuen08]

Originally Posted by Gobuffalo

I am using the factory computer that came with the LQ4. According to the people reprogramming my computer, the only issues I may have are in low range the trans will want to up shift when I'm in drive and if I use the sender to run my speedometer it will be off. The only time I'm in low range im holding the shifter in low so it won't shift. I am also going slow so I don't care if the speedometer is off. High range is 1 to 1, so the computer doesn't care.

Did you find out if this was the only issue? I am currently
In the process of a swap and have the 4wd trans as well. If the only problem is the speedo not working in 4 low that's fine with me
Posted via Mobile Device

[Duck1]

Originally Posted by Gobuffalo

Finished lower half of crossmember.
After powder coating I'm into this for $65.00 and 8 hours of my time

did you sell this

[Gobuffalo]

It’s bolted in my 70 Suburban.

[52napco]

I got lucky when I bought my 1991 V3500 with a 4L80 and 205.one year
Only and very hard to find