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if you are having alt. problems, fix that first. It may resolve the Dakota digital signal. My DS1 drives a large tach in the dash and the US shift module. I get an intermittent blip on the tach, it has a little bounce every 20 to 30 seconds but it does not seem to bother the trans computer. I...

I did confirm last weekend I am getting 16 MPG on the high way. I drove I-45 from Texas city to Madisonville. (bucees to bucees for those that are familiar with the route.) Verified with garmin. I ran 70 to 75 the entire way and got almost exactly 16mpg which is the same as my 2014 duramax

pretty sure it is driver side goes to front battery. I am going to do the same as far as the cooler. My tranny is running to hot. The radiator keeps it at about 210 and can climb to 230 (that is the highest mine as ever gone) under heavy load. I am going not use the radiator cooler portion...

and by the way, I had to pay them shipping for them to send them back to me. twice I did this and then gave up. get your money back while you can

send it back. dispute it on your credit card and go get a US shift 1 controller. you will be happy you did.

I got that three times before giving up. the first unit they sent me had an EFI program in it and not the trans program. I wish I would have warned you sooner. good luck. don't let it trash your tranny. one of the three ruined a brand new rebuild. it over pressured it. Rich

stay away from tci. it is crap. went through three before giving up and buing US shift1 controller. very good unit. comes with wiring harness. you do need tach interface which you can get from DS1 module from Dakota digital. the Dakota digital and us shift controller together cost less than...

on my install I had to lengthen the rod and move the mounting hole in the frame. I made and add on bracket that bolted to the original hole and moved the hole toward the back of the truck about an inch to 1.5 inches. It still took a lot of working with to get the linkage to work with all the...

yes, the lower linkage has the cup and spring.

4l80e shift linkage move here is the bracket I made to move mine. I bolted the bracket to the original hole that the linkage went through. I made it out of some scrap. I may make a better one in the future. the second hole is there because I did not get it in the right place the first time.

you need to move the pivot point of bottom shift linkage back. I had the same problem with mine. The bottom piece (the one that goes into the shift fork on the tranny) will bind in the shift fork and cause it not to shift to 1 and 2.

TPS for 4l80e for those looking to do the 4l80e swap, here is the throttle position sensor that I used. replaces vacuum style TPS on IP pump. I used the Dakota digital DS1 interface for the RPM signal.