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I just did the same thing. Highly recommend US Shift's Quick 4. Also went with an NP241C to get the 2HI option. Putting mine in Park is actually very satisfying. ☺ I might have a line on a 4L80e with 6k miles if you're interested. The 4L80e makes a world of difference in drivability. Kicking...

If anyone in the N TX area needs an OEM TH400 from an M998, I've got one. Also have an NP242 that I replaced with an NP241C. Tell your friends!

Just wrapped mine up, too. Incredibly satisfied. Overdrive is great, and when the TCC locks? Sweetness.

Can't answer your question, but can give a plug for US Shift. I replaced my mil TH400 with a civ 4L80e and am totally happy with it. You'll love it. Jake at USS is superb. I sent him a HMMWV profile with shift points that they'll be adding to the standard templates. Good luck.

I've seen several who've used that. It's Plan C for now. Thx.

Thanks for the picture, but I'm going a little sideways. Not using a HMMWV tach, but a Faria 4000 rpm Pro Red 12v version. Plan is to mount it on the underside of the radio shelf, facing the driver. So, it's not really the install sheet I need, but an understanding of which lead coming off...

Yeah, that sounds about right. The 4wd 4L80e's have no tone ring, making this a challenge. The oil-pump driven transducer is readily available, which can be the feed to your TCM. For now, that's the only tach I'll get - the TCM. My "new" tach won't work without the Autometer adapter for...

Trying to solve this challenge myself and need some clarity. Just installed an aftermarket TCM with a tach input, and since the software allows for adjustment of # of cylinders, I'm hoping I can play with it until it works. However, there are 2 wires coming off the oil-pump drive transducer...

I used a set of seats from a Razor UTV. Lightweight, side supports hold you in, and so much more comfortable than the OEM seats. Added a sliding rail from a donor Jeep seat for the driver, and cut the top section of the rail behind the driver seat. I'm 6'6" and needed that extra 2". Works...

Update: Quick 4 TCM is awesome. Finally set the axle ratio correctly at 4.9152 (2.56 axle x 1.92 hub reduction), and set the shift points at RPM's that were reasonable. Such a satisfying thing to feel the shift in all gears. With the T-Case in 2Hi, I actually can feel a difference...

Agree with kblazer - LOVE this little thing. Want one.

The Quick 4 can take your TOSS signal, using drive axle ratios, and provide its own signal. Again, totally adjustable, so you don't need the on board sensor I use.

Quick 4 with harness was around $750. VDO speedo was $75 - you'll need one, because you'll likely lose the speedo drive cable. Don't fight it - much better and more reliable with eSpeedo. TPS was $50 roughly, can't remember. Other minor things, but those are the drivers.

The Quick 4 takes the input signal from the sensor on the back of the block and outputs a signal to my tach. The ratio is adjustable in the Quick 4 data table (easy to modify), so you can synchronize with your GPS until you get it right. Infinitely adjustable.

For those waffling between 700r4 and 4L80e, I personally recommend the 4L80e. It's a stronger unit, and the only add-on sensor needed is a TPS, which mounts easily where the kick-down switch is mounted. The laptop tuning option is very cool and empowering, in my opinion. If I can adjust to...

Update on this, for those interested. Unfortunately, due to a busy work travel schedule, and the shop being closed on weekends, Gunny still waits on me to wrap up the TCM. But some progress, mostly in my head. The shop told me after they did the mechanical install that they couldn't get it to...

After endless waffling between the 700r4 and 4L80e, I ended up finding good deals on both, so I bought them. The decision on which tranny to use hinged on the degree of difficulty in the setup required for the 4L80e, since it was clearly the toughest one. US Shift/Baumann Electronics produces...

Another thing... the shaft looks like it will be a bit long. Either drill a roll pin hole closer to the end, or grind off some of the shaft. I like the former.

You're a step ahead of me - I haven't bought a TPS yet. I see what you're saying though. I think if you were to carve a groove in opposite sides of the butterfly "wings", so as to make a sort of saddle for the roll pin, that could do it. Not sure, though, if you'd have room to rotate/clock it...

Try this again. TISS, TOSS and TPS. The 4L80e provides the first 2.