Well the 4l80e is in place. The drive shaft is cut and remounted. The holes for transmission cross member are drilled. The wiring for trans controller is run up to cab. All in all this are going good so far but lots of work still to do.

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Hi Philip,

Are you going to make your own controller of use an aftermarket one ??  Kudos on the transplant as well.

I had to use an after market one.I could probably reverse engineer one but I'm not knowledgeable enough about electronics to pull it off from scratch.

Hi Philip,

I assume that since the post was back in 2016, your 4L80E swap has been finished and you have some running time on the new transmission. I am in the process of doing the same thing on my '85 P-30 Pace Arrow. I would be interested in the performance data post-swap. Mainly, drive ability, fuel economy improvement, cruising speed (in OD), According to my calculations, using a 31.5 inch tall tire, and a 3.56 rear gear, I should be getting similar results; 2200 RPM reading in OD at 65-70 mph with the converter locked. I have swapped out my steering column with one salvaged from a 1993 chassis with OD with the neutral safety switch, locking column ignition switch, brackets, the whole shebang!. I have finished installing the Transmission Control Unit, TPS, programming console and driver controls, etc.. with all the wiring tested and verified. The TCU computer found a new home under the couch behind the driver's seat. Will be ordering the transmission this month. All that's left is to cut the driveshaft, slide the cross member back, and bolt her up. BTW: A little luck: The new shift sector works fine with the TH400 until the transmission comes in. It should be a plug and play then. I didn't see any post about your final results. Thanks Sm.

Hey Sam.
Well I'm pleases to say it works beautifully. With the lower rpms it doesn't get near as hot pulls good and gets between 10 to 11 mpg. I've driven it from Youngstown OH area in to Cape Cod , colonial Williamsburg, finger lakea in up state by and various other short trips. I got my transmission used and I love it. Best of luck with yours.

Thanks Philip, That feedback is greatly appreciated. And from your description, that confirms what I have expected from the upgrade. The the 454 is a torque monster, not a high end engine like a small block. Today mine runs about 2900 rpm at 65mph and gets about 6.4 MPG at that rate. That's

too much RPM's for a fat block; it tends to run hot and sucks the gas! Then again, the highway speed in 1985 was still 55MPH!! I have noticed that the engine and oil temperature drops dramatically at lower RPM like 55 MPH. Thanks again for the feedback.

Sm

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