01_Cummins_4x4

Damn that sucks! Sorry to hear ACS is dragging their feet on customer service and a fair turnaround time to get you your ECM back to you.

It definitely sounds like a ignition timing issue to me as well. Do you know if the ECM still has an existing tune - Smarty, Quadzilla, etc., that might have introduced timing mods other than the stock ignition timing? If the ECM wasn't returned to the stock tune, it might have too aggressive of ignition timing programmed into it, causing the knock issue.

I think the crossmember flange head bolts 15mm in socket size are like M10 and about 1-1/2" long. The nuts are flange style nuts and I think they are 18mm in size.

A few months ago I experienced death wobble in my 01 Cummins 4wd at 60 mph, and it was violent and scary. It was the very first time I've personally had it happen to me. I know my shocks look like older OEM style shocks, so I just got in a new set of Bilstein 5100 shocks to put on it, and I got a new set of adjustable control arms so I can adjust them to get some positive caster in the front end. My ball joints were replaced by the previous owner who I got the truck from, and they still are tight with no play in them. After I install the new shocks, control arms, new heater and evaporator cores, I'll get an alignment done on it.

I agree with Moparman, in that if you live where it gets cold with snow and ice, then the 200 degree + thermostat is the best way to go. I installed a 205 degree Mishimoto t-stat in my 2001, and it made it warmer. My heater core doesn't put out enough heat, so I'll be installing a new heater core here shortly. My AC blows cold, but I'm installing a new evaporator core at the same time since they take the brunt of all the dirt and crap that blows in from the cowl.

I just got this 75 Chevy Cheyenne SWB 4x4 from a friend of mine for $3,500. He just put a brand-new set of $1,400 35x12.5R15 Mastercraft Courser MXT tires on a set of $900 new Black aluminum 15x10 wheels. It has a modified SBC with an Edelbrock Performer RPM intake and a newer 750 Holley 4 bbl carb, and a set of headers. I just got a set of nice Enkei 15x10 wheels for it, since Black wheels don't look right on a grecian bronze and frost white two-tone paint job. It will be getting repainted in those two factory colors.

I have found Royal Purple on sale at my local parts store, and it was cheaper than any of the other name brands of oil, so I went with the RP.

I have 110 switches on my work network that I manage. We have around 30-40 different VLANs, and we separate them by traffic type. We have data vlans, VoIP vlans, and security/camera vlans in every building in our campus network.

You could use some synthetic ATF+4 like Royal Purple or Valvoline.

Congratulations to you both! Life is too short to live alone. Having a life partner to share the lows, highs, smiles, laughter, tears, as well as, the same interests and hobbies, all contribute to making each of us stronger, healthier, and gives us a sense of purpose to live for each other.

I bet both bands are too loose now after 10 years. For a couple hours of time, and a trans filter and some ATF, it would be a simple thing to adjust them to see if it helps your issue.

Both bands should be adjusted as they probably have never been done unless the trans has been fully rebuilt. I just adjusted both bands on my buddy's 48RE, and now it shifts correctly from 2nd to 3rd gear without having the shift delay it was having.

Gates, Murray, NAPA, and other vendors who both make cooling system products have been bought out by Motorad. I've had a few issues with Motorad t-stats, so I bought a 205 deg t-stat from Mishimoto, and with my aftermarket aluminum new radiator and coolant, it will run 190 - 192 while cruising down the highway at this time of year.

Use https://www.vindecoderz.com and see if your truck actually came with keyless entry. It's possible that the key fobs died or got lost and the previous owner just got a regular key for it. If it originally had keyless entry, you could get a fob and program it to fix this issue.

Check the push on electrical connectors on your grid heater relays. I accidentally bumped one of mine once and unplugged it when working under the hood.