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Changing it out yesterday I did in fact see this truck did NOT come originally with air dryer. The bracket was well installed but clearly evident that it wasn't original. Had drilled holes in bracket to bolt up to the crossmember. Definitely done by hand and off center. Good work though. Jim

Ok. I got my dryer late last week and just yesterday fixed my lack of air issue with the compressor unloader. What a joy getting that top basket on that compressor. It's the getting of them two back bolts (especially the right one) just started into the hole in the basket that took 1/2 hour...

Sorry, I meant M939A2. I keep forgetting they were in a learning curve with the whole M939A0, A1, A2 series. I think the A2 did come with the pure air plus from production, or was even the A2s upgraded?

Well, the dryer isn't the problem after all. Took the inlet line off today and no air getting to the dryer at all. Still gonna upgrade to the MRAP dryer but darn, now what? Jim

Good to know. That is the route I will take. I noticed the seller on bay is from same town as suprman (may have spelled wrong) so I suspect thats him. I will order this evening.

So I cannot build any air pressure and since these need rebuilt every few years anyway I thought I would eliminate the air dryer. Here is what I found. PURest by Haldex. A seller on some bay is selling them for a bit less than the rebuild kits to rebuild my Pure Air Plus unit. Only 3 holes to...