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Yes I have checked all fluids I haven’t flushed the transfer case but i added some fluid , the trans was empty it had a leak so it has 30 weight oil in it

I haven’t let it coast yet at 30 I will try that tomorrow. I have recently replaced the injectors and the injector pump dove the overhead adjustment and replaced the fuel filters . I’m going to recheck my injector adjustment I didn’t trust my torque wrench so I ordered a new one I did Ibc so...

It doesn’t smoke and seems to run great , in first and second goes right up to 2100 rpms when I get into third gear it drops to about 1500 and takes forever to get up to 2100 I have only got it into fourth gear a couple times and it was low rpm . I have had it in all gears just to make trans is...

Not sure what else would make the truck sluggish , it also seems like the rear axles seem bouncing a bit thought it was cause of old flat spotted tires but could also be from sprag stuck i think .

Removed front drive shaft no change , checked all bearings and brakes for excessive heat there isn’t any . The truck is confirmed in high range and I have a m36a2 so I am familiar with the shift pattern . I pulled the sprag air cylinder apart and it wasn’t rusty or anything I put it back...

I’m going to check it out some more this afternoon I’m hoping if I remove the front drive shaft it will drive normal then I’m going to troubleshoot from there. I could only get the truck up to 40 mph downhill flooring it, it was a long slow ride to get diesel mostly 30 mph .

I haven’t rolled in the opposite direction in gear , this truck has sat since 2002 I’ve only owned 6 weeks I haven’t driven it much yet .

I haven't tried to see if the problem is the same in low range yet that was also planned for tomorrow .

I haven't checked for heat that's a good idea will do that tomorrow, the truck rolls freely so wasnt thinking of anything stuck definitely something to look into .

If the sprag is stuck and I drop the front drive shaft will that no longer hurt anything . Thanks the info guys

also am I supposed to hear a air valve noise when shifting from reverse to first I havent tried with the truck off but when running I can't hear any air valve noise .

I have 1982 m813 usmc model with rear lockers . I think my sprag is stuck engaged because I can't get up to speed and the truck shutters when put into third gear like its towing a trailer . I'm planning on dropping the front drive shaft and seeing if the problem goes away . If truck goes better...

Thanks for the info I’m gonna do it tomorrow.

On my m813 the fuel tank vent line is twisted and crushed near the transfer case . The line appears to run up the passenger side frame rail and goes to a air connection near the horn on the firewall . I would like to just replace the damaged section only about two inches long . Im not sure how...

I did the overhead today used the ibc method it worked great the valves were close the injectors were way off . Cleared up the excessive smoke I was getting and I did check the accessory drive for accuracy it was correct . Thank you for the information it definitely helped clear up the process...

I am planning on doing ibc because my engine plate says .011 and .023 for valve adjustment . Figured I would stick with that . What would be best way to check the accuracy of my accessory drive timing for ibc . I'm planning on starting on injector 3 valve 5 so once that adjustment is done , put...

Ok I got it thank u for the clarificaton .

I have a 1982 m813 nhc250 it has the top stop injectors I want to do the overhead on it tomorrow. I have been doing research on here I just need clarification on a couple things. I barred my engine over and appears I have the markings i6vs , I did see another marking near it but not a continual...

I have a M998 hmmwv registered in ny for road use I bought it from a dealer in nj off craigslist with a on road title . I had the right clerk at the dmv since am general wasnt in there list of manufacturers and there wasnt a weight on the title but i still got it registered . A guy at work has...