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  1. simp5782

    transfer case regear thoughts for M939 series

    Bump with some ratios and information alternatives. Oshkosh 30000 from the 7 ton is a single speed case @ 1.27:1 ratio. You would need a double over drive transmission to get any speed out of it. Speed of 41mph on 1600s at 2150rpms. Oshkosh 55000 from the HEMTT/HET/M916FLs is a .98 high...
  2. simp5782

    transfer case regear thoughts for M939 series

    180 set for takeouts Sent from my SM-G935P using Tapatalk
  3. simp5782

    transfer case regear thoughts for M939 series

    Transfer cases blow apart in high and low range. There is no pattern. Ive blown several in Low forward, and High forward. Not in low reverse actually. I can blow the transfer case in half with my 1st gear on my current setup in high range if I jumped on it. Silverstate55 rode with me the other...
  4. simp5782

    transfer case regear thoughts for M939 series

    Trying to find out the PLS specs of the drum on it first. Hopefully its an od unit. As far as case options. They are limited. The Oshkosh 30000 series that the MTVR has actually is the same as the HET apparently so that is out of the question. Not sure of what the MK48s use. Other option would...
  5. simp5782

    transfer case regear thoughts for M939 series

    Max big cam torque is 1250 and hp is 2150 and they split at 1550/1600. at 2150 I can still run 68 or so which is nice when you don't bog on hills. I wouldn't say last long on high rpms. Mine has ran 2000 or higher up until 2 months ago and she has no longevity issues.
  6. simp5782

    transfer case regear thoughts for M939 series

    I doubt the T1138 will take the power of a big cam with some umph thru the CAT without it going caput. No sense in breaking it when a heavier case like the HEMTT would benefit me. The T1138 front drive line angle is pretty difficult with the how the transmission sits. with a HEMTT case since...
  7. simp5782

    transfer case regear thoughts for M939 series

    Going to bring this one back as I am looking at going to a stronger case but wanting to keep some road speed but still be able to utilize low range if I need to with the 16 speed. The T1138 would blow apart in low range. I shouldn't need it but still. They are getting low on supply and no sense...
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