t-case question
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Mountain Pass
Joined: Aug 2008
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t-case question
okay so a few days ago i posted how my t-case has failed and i have an np-208 to put it the old brog warner 1356's place, well i sold a transmission i had layin around and the guy wanted the t-case with it.
But, i happen to have some credit at a place, where i know i can get on, i have a question though, will an np-205 cast iron gear driven t-case work with the m5od 5 speed gear box? they have a few up there, and i figure i should go tougher than the 1356 if i can, im just concerned the weight will put to much stress on the m5's tail end i mean after all it weighs like 140 pounds right?
But, i happen to have some credit at a place, where i know i can get on, i have a question though, will an np-205 cast iron gear driven t-case work with the m5od 5 speed gear box? they have a few up there, and i figure i should go tougher than the 1356 if i can, im just concerned the weight will put to much stress on the m5's tail end i mean after all it weighs like 140 pounds right?
Hotshot
Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
both drive shafts will need changed in some manner. that box wont isnt as low geard as the 1356. honestly i would just find another 1356. they are a stout Tcase and are backed behind many larger motors including the 7.3 diesals.
Lead Driver
Joined: Sep 2002
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From: Gateway to the West
Beg to differ with you on that one Kem. The helical gear-driven 205 is far stronger than the chain-driven 1356. Its true that the 205's low ratio is a mere 1.96:1 compared to the 2.69:1 low endof the 1356. You will never stretch a helical gear either. (Oops! Pulled the last statement I made).
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Mountain Pass
Joined: Aug 2008
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i dont much mind not haveing the low gear, its not a major off road rig, i just worry about blowing my m5 to smithereens i wanted to put an np435 in but with the amount of work required to install it, changeing the tranny brace and such, i dont think its worth it, that and ill suffer in the area of MPG's right now im getting 14.5 with my 33's, ill more than likely end up with a 1356, but if i can mount the 205 on the end of my m5, without it snapping in two, or haveing it spit out its input shaft then it might be worth haveing to re work the drive shafts cause, its all gear driven no chains and a very stout t-case, so that what i wanna know will my tranny break?
Lead Driver
Joined: Sep 2002
Posts: 9,182
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From: Gateway to the West
The ZF S5-42 (M5HD to some folks) is a direct swap and much stronger than the M5R2 (M5OD). Just a thought. They aren't always easy to come by but they are out there. A ZF with a 205 behind it would take any question of driveline weakness out of that area.
As for whether the M5 will hold up, it really shouldn't be a problem especially since you say the truck isn't used as much off-road. The 205 will take what the M5 gives it. Its not like you are putting a diesel in front of the M5. As for the added weight of the 205 over the 1356... how much serious bouncing are you going to be doing? "Not a major off-road rig" says there isn't much worry about it getting smacked or bouncing around behind the "mag-cased" M5. Personally, I would be worried more that with the 205 in there you will kick yourself for not putting a stronger trans in it. The M5 is great for light stuff and if you want to go 30 mph in reverse.
As for whether the M5 will hold up, it really shouldn't be a problem especially since you say the truck isn't used as much off-road. The 205 will take what the M5 gives it. Its not like you are putting a diesel in front of the M5. As for the added weight of the 205 over the 1356... how much serious bouncing are you going to be doing? "Not a major off-road rig" says there isn't much worry about it getting smacked or bouncing around behind the "mag-cased" M5. Personally, I would be worried more that with the 205 in there you will kick yourself for not putting a stronger trans in it. The M5 is great for light stuff and if you want to go 30 mph in reverse.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
no question that the 205 is stronger, i just simply stated that the 1356 is no slouch either, although it does have its weakness's.
you may want to consider some sort of brace for that 205 just due to the weight of it.
you may want to consider some sort of brace for that 205 just due to the weight of it.
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Mountain Pass
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Postmaster
Joined: Nov 2009
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From: SE Georgia
I have a ZF5 with the real low first gear and the stock 1356 Borg Warner and it does good.
The NP205 is a good transfer case but is heavy. I would make a mount for it so it won't damage the transmission case of a M5OD or ZF5.
The NP205 is a good transfer case but is heavy. I would make a mount for it so it won't damage the transmission case of a M5OD or ZF5.
Mountain Pass
Joined: Jun 2011
Posts: 225
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From: Berryville AR
X2 on building a mount for the 205. Even with NP435s Ford put a bracket on the 205s to help with the weight. I've read that one or the other would break without the mount when offroading hard.
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Mountain Pass
Joined: Aug 2008
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yeah, i probably would, if i manage to find a zf and a 205, its not gonna be a major off road rig its been through to much in its life, that and i put alot of love into restoring it, check out the pics you'll see exactly what i mean, its not perfect just yet but im getting there
Postmaster
Joined: Nov 2009
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From: SE Georgia
yeah, i probably would, if i manage to find a zf and a 205, its not gonna be a major off road rig its been through to much in its life, that and i put alot of love into restoring it, check out the pics you'll see exactly what i mean, its not perfect just yet but im getting there
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Mountain Pass
Joined: Aug 2008
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ill make a mount should i be able to find a zf to put a 205 in, i probably wont mount it to the m5, cause of the work involved 
check my work out in the pics, i make sure evreything is done right and strong
check my work out in the pics, i make sure evreything is done right and strong