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its doing this with No r134a and no shraeder valves? Lol

the only way that compressor is running when off is if it’s already bad or the clutch is stuck. yes, I bad low pressure switch, but never had one bad in this setup.

Dirt wrong PAG oil no PAG oil old dryers what could possibly go wrong…LOL the Mfg of the compressor dictates the pag oil viscocity, Sanden uses a PAG15, R4 compressor uses a PAG150, check The dreaded TM.

Makes no difference what the valley says for all intents, the casting date format tells all…as Greg pointed out. 04=April 11=11th P=2007

Mounts in a different spot on REV B truck…

I literally have to remove a drain plug every week on customer trucks, always hit it with heat first, than once stripped, drill it out and use a large ez-out, it’s literally a 5min job,every week for years…. ive even had good success with vice grips if there is enough threads still protruding...

i doubt you did, you had a Dalton Foundry block from GEP that is devoid of casting dates.

Melton is a rebuilder, not a manufacturer like GEP. So you can and most likely have a rebuilt GEP motor from Melton

BTM is an acquired talent….

The simple solution is to buy them from either Kascar, HPG or MAC, than you can be assured your getting the correct plug…even though I continue to state this, I get trucks in the shop with blown Chinese unbranded garbage.

I would recheck them now….

For The starter

You found the end cap for the solenoid

why do you need a REV? Sell your current truck to fund a REV?

REV doesn’t stand for revision, it stands for Reliability Enhanced Vehicle

ive literally seen pics of folks filling the hub from the upper plug on the GH, no one bench filled anything, I’ve rebuilt hundred of GH’s, I’ve always filled after the hub is on, if it falls over the GO leaks out of the vent. If you want to know if the rear diff cooler is cracked and filling...

REV A rear diff cooler is PS fluid REV B Tcase and rear differential are Glycol cooled.

REV B is all 300k on up

I have both REV A and REV B M1165A1’s…yes, it is a correct term.

Or as I’ve seen, some fool who filled the hub from the upper halfshaft retaining bolt hole at the top of the GH… I just did an M1165A1 that had 3 of 4 over filled. Not the first time I’ve seen this.