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Sounds like you’ll be better off rebuilding the 400. The M1009 already has more highway friendly rear gearing and without a lot of highway driving the 4L80 probably will be worse for you.

Well that’s probably why it didn’t work. 😆 TCI should be able to help with that question, because I have no idea.

I ended up using a Dakota Digital tach interface unit (DSL-1 if I remember correctly.) I first tried the 6.5 cam driven sender like you mentioned, but couldn’t get a strong enough signal. I don’t know if it was a bad sender and I don’t remember how much testing I did of it, but I know I only had...

You’re moving the engine forward? That’ll be a lot more work that moving the trans mount back. Plus there’s not a whole lot of room in front of the engine. But it sounds like you might have a plan figured out already. You changing to electric fans?

I had the transfer case rebuilt when I did the trans swap. Only issue I’ve had was it would pop out of 4 Hi into neutral. There are plastic wear tabs on the shift fork that once worn out will cause this. But I don’t think it’ll cause it not go into 4 Lo.

I used the stock 4L80E mount with the NP208. I just had to make the ‘pedestal’ to go in between the 4L80E mount and the CUCV crossmember. I could’ve also used the stock TH400 to NP208 mount if I clearanced the lip on the mount slightly to fit in the rear of the 4L80E. Not sure if that’s what...

Very nice GlockFan. The 4L80 swap is the best thing I’ve done to my CUCV. 2nd best was the turbo. [emoji631][emoji41][emoji1303]

I did not need to get an electronic vehicle speed signal. The transmission knows how fast it’s spinning, and the transfer case has a mechanical speedo output for the gauge. The trans control computer only needs an ENGINE SPEED (RPM) signal and a throttle position signal. (And obviously the...

Well, coming from someone who did the 4L80E swap, it was definitely worth it. The 4L80E is easy to tune the shift points, shift firmness, torque converter lock up... And the stock 4L80E is far stronger than the 700R4. Plus you don’t have to worry about the TV cable that is a pain to adjust, and...

I would make sure you get the pickup as close to the flywheel teeth as possible without touching. If I remember correctly, you can tune the settings for when the converter locks and unlocks too. Just takes some playing with to get it the way you like.

What pickup are you using for the Dakota Digital? I originally had and issue with the magnetic flywheel tooth style pickup, but it was my fault. I didn't have it installed close enough to the flywheel teeth for it to create a reliable signal. Once I reinstalled it with the correct distance from...

Geeze what a joke. At least they should help you troubleshoot it without attitude.

I haven't had any trouble with the TCI unit. It seems like quite a stretch but maybe the three Richingalveston had were all bad from the same lot or there was some other unknown issue causing the problem. Who knows, but mine has worked flawlessly. By the way, are you going to try that speed...

For the shifter linkage the only real modification was lengthening the linkage rod. I took round bar of the same diameter as the original and welded in a few extra inches. Then you just have to play with the adjustment and position of the linkage to get it to have full range of shifting. It's...

Then again, with the limited power, the 4L80 is probably all the truck needs. With the 6L90 you'd probably need to lower the axle gearing just to make the 6th gear usable. Ha ha.

The 6L90 would be awesome, but it would probably be a lot harder to find a used one. And probably more expensive too.

Nice. Just be sure you post some good pictures! Ha ha

Thanks. You'll definitely be happy with the improvement that extra gear makes. It's been a little over 5 years now and just under 30k miles. I've done a ton of off road driving, mud, sand and rocks. I've towed other cars, and even dragged a destroyed full size pickup with 2 flat tires about 11...

Second to last pic on the first post. It's pretty much just a cable that's hooked up on the injection pump and the cable routes to the remote sensor. It's nice cause there are a bunch of holes to fine tune the length of pull and how much it actuates the sensor.

I originally wanted to make throttle pump mounted TPS work, but using the remote sensor was easier.