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  1. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    Well played, autocorrect typos are awesome. Seriously though, there was a rocker totally off its mount. The thing would crank and idle even with all that damage. Cam looks ok from what I can see. There was a lifter just sitting in the valley on the opposite side from the photo. It’s the most...
  2. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    I’m not sure what happened to it. I’ve never actually driven this thing on road. There was a rocket just hanging around under one of the valve covers, but I don’t know if that’s a cause or a result.
  3. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    Yep I replaced the injectors with 454 sized injectors. Engine has a mechanical issue. Finally got it out and pulled the intake. Photos attached.
  4. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    The 4L80E is the current transmission in the driveline. The motor went south, and I got a deal for a 454/TH400 with 70k miles. Me not knowing transmissions thought that more miles is bad, which sent me down this rabbit hole. Current plan after what I've learned in this thread is to drop the...
  5. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    Brain fade
  6. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    You've successfully beaten me almost all the way to the 4L80E. If you would though, lets perform a thought experiment. Forget about all the custom that has to happen for this swap for a moment, because my brother is handling all of that and could probably be a pro mechanic if he wasn't already...
  7. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    iirc it was in the 20s I will say that it was running pig rich before we started taking things apart. Oh and I redid the gasket/spring in the injector pressure regulator too, no change in operation. The prior owner did say he'd replaced the fuel pump, so if the swapped motor starts doing the...
  8. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    Went through the entire motor and got it to where it'll start with the bump of a key and idle fine, but no matter what I did, try to give it gas and it bogs. New distributor, new map, new plugs and wires, new O2 sensor, new ECT sensor, new injectors all AC Delco. Cylinder #7 becomes a dead...
  9. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    I haven't completely made up my mind but 250K that I haven't seen shift going down the road scares me. My concern is that I listen to the guys on the internet and end up with a blown trans and I have to deal with that.
  10. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    I posted a couple times that it's not going to be traveling far. maybe 30 miles to RV service and back home. local driveshaft shop quoted me $200 to extend the driveshaft and rebalance. Kickdown solenoid is wired to a switch engaged by throttle linkage I have the tone wheel to drive the...
  11. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    Thank you for the advice but I don't have the skills, tools, or a clean work area to mess with an auto trans. My options are stay with the 4L80E with a quarter million miles, that I don't know works, because it's only ever rolled around the yard at idle. Or, I have the TH400 that drove itself...
  12. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    Nick, I have a unique set of circumstances and I'm trying to work with what I've got. If you have a free 4L80E to send me I'll be happy to stay with the 4L80E. Do you really think I should stay with a 250K transmission over one with 70k? I don't even know if it works right or not.
  13. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    I didn't want to go to a TR400 either but it's the path of least cost. This RV will be semi-permanent housing for me, and will only drive to somewhere with RV service and back. I won't be touring America in this one. I got the 454 and TR400 pretty cheap for the low miles they have. Thank you...
  14. W

    4L80E to TR400 Trans swap 1995 Chevy P30 chassis motorhome

    Hello GMT400 Members, nice to be here. I am hoping that one or more of you can share some wisdom. I have an old 1995 Class A Motorhome built on a chevy P30 chassis. I wasn't able to bring the 454 around to where it would run without falling on its face so I bought a 454/TR400 used out of...

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