203 or 205 transfer case??

I have a 84 Chevy half ton C/10 with a 305 and the trans is a 350 turbo with a 6" Lift sitting on 35" bf Goodrich krawlers. So my question is what transfer case would be the best for me? and why? I use the truck for hunting,playing in the mud and to get to work.  

if u have the money and know how build a doubler w both the 203 and 205. if not use the 205 its stronger.  

Killsoon- Personally, I would forget about both of those T-cases.  They are old, heavy, and pretty much obsolete at this point.  Especially for your application.  A 305 isn't putting out a bunch of horsepower, and those 35's really aren't that big to neccessitate a 205 for the strength.  Unless you plan on building a doubler, which is only good for rock crawling really, then just stay away from them.  My first choice would be a NP208.  I know, they're chain driven.....BIG DEAL!  So are all the t-cases that are put behind every Diesel powered pickup being built today.  They're not as weak as everyone says they are.  The 208 has very distinct advantages over both the 203 and 205.  It's aluminum, so it's much lighter than both.  It also has like 2.7:1 gear reduction in low range.  That's a huge difference.  Also, anyone who has had a 208 after owning a 203 or 205 will tell you that the 208 is WAY easier to shift than either of those two.  So, to me, unless you are building a monster rock crawler, with a big block and 1 ton axles sitting on 44 inch rubber, it's a no brainer here.  Something else you may want to consider when doing your swap is securing a 700R4 tranny along with the 208 (chances are you will find the 208 behind any 700R4).  Have the R4 gone through at your local tranny shop and throw them both in at the same time.  The R4 has a deeper 1st gear and an overdrive as well.  This combo would make your truck seem like a completely different vehicle!  

WYJAX:
Killsoon- Personally, I would forget about both of those T-cases.  They are old, heavy, and pretty much obsolete at this point.  Especially for your application.  A 305 isn't putting out a bunch of horsepower, and those 35's really aren't that big to neccessitate a 205 for the strength.  Unless you plan on building a doubler, which is only good for rock crawling really, then just stay away from them.  My first choice would be a NP208.  I know, they're chain driven.....BIG DEAL!  So are all the t-cases that are put behind every Diesel powered pickup being built today.  They're not as weak as everyone says they are.  The 208 has very distinct advantages over both the 203 and 205.  It's aluminum, so it's much lighter than both.  It also has like 2.7:1 gear reduction in low range.  That's a huge difference.  Also, anyone who has had a 208 after owning a 203 or 205 will tell you that the 208 is WAY easier to shift than either of those two.  So, to me, unless you are building a monster rock crawler, with a big block and 1 ton axles sitting on 44 inch rubber, it's a no brainer here.  Something else you may want to consider when doing your swap is securing a 700R4 tranny along with the 208 (chances are you will find the 208 behind any 700R4).  Have the R4 gone through at your local tranny shop and throw them both in at the same time.  The R4 has a deeper 1st gear and an overdrive as well.  This combo would make your truck seem like a completely different vehicle!

WYJAX- I just have to say, I agree 100% with you about the 208. I prefer it over the 203 or 205 t-cases. I have seen a mud buggy that had over 1,000 HP to the wheels and had a TH475/208 setup and I know the cases were tricked out but still, thats alot of HP! I've seen the couplers break on the 205s and the outputs on the 203s scatter like they were made of glass, and the 208s get hit by rocks and were cracked beyond repair. I will still use a 208 before any other t-case. They are cheaper and easier to rebuild than the other two and light enough to take out by yourself. Like you stated, mate it to a TH700R4 and match up the proper gears to the tire size and you are crawling. I had a 83 Blazer with 350/700/208 and 4.88s with 35s and loved it! Its the proper setup in my opinion for what I used the Blaze for.  

WYJAX:
Killsoon- Personally, I would forget about both of those T-cases.  They are old, heavy, and pretty much obsolete at this point.  Especially for your application.  A 305 isn't putting out a bunch of horsepower, and those 35's really aren't that big to neccessitate a 205 for the strength.  Unless you plan on building a doubler, which is only good for rock crawling really, then just stay away from them.  My first choice would be a NP208.  I know, they're chain driven.....BIG DEAL!  So are all the t-cases that are put behind every Diesel powered pickup being built today.  They're not as weak as everyone says they are.  The 208 has very distinct advantages over both the 203 and 205.  It's aluminum, so it's much lighter than both.  It also has like 2.7:1 gear reduction in low range.  That's a huge difference.  Also, anyone who has had a 208 after owning a 203 or 205 will tell you that the 208 is WAY easier to shift than either of those two.  So, to me, unless you are building a monster rock crawler, with a big block and 1 ton axles sitting on 44 inch rubber, it's a no brainer here.  Something else you may want to consider when doing your swap is securing a 700R4 tranny along with the 208 (chances are you will find the 208 behind any 700R4).  Have the R4 gone through at your local tranny shop and throw them both in at the same time.  The R4 has a deeper 1st gear and an overdrive as well.  This combo would make your truck seem like a completely different vehicle!

YZ250JV:
WYJAX- I just have to say, I agree 100% with you about the 208. I prefer it over the 203 or 205 t-cases. I have seen a mud buggy that had over 1,000 HP to the wheels and had a TH475/208 setup and I know the cases were tricked out but still, thats alot of HP! I've seen the couplers break on the 205s and the outputs on the 203s scatter like they were made of glass, and the 208s get hit by rocks and were cracked beyond repair. I will still use a 208 before any other t-case. They are cheaper and easier to rebuild than the other two and light enough to take out by yourself. Like you stated, mate it to a TH700R4 and match up the proper gears to the tire size and you are crawling. I had a 83 Blazer with 350/700/208 and 4.88s with 35s and loved it! Its the proper setup in my opinion for what I used the Blaze for.

you guys summed it up great........ i swapped out the th350/203 combo for a 700r4/208 combo and i love it so far..... do know how much of a pain it is to drop and lift a 203  or 205..... and shifting thim was like shifting a 30 year old t case which is waht they were... my 208 shifts so much easier...... its nice and light and the low range actually feels like its doing something not like my old 203 where i couldn't really even tell i was in low range...... btw im now running 35 inc tires and 4:88 gears...... its a great combo and if you wanna go slow the 4:88 gears with the 208 low range really turns the blazer into a rockcrawler    
solid axle chevys cant be beat
78 K5: 350 V8,700r4,np208, 8 lug D44 4:88, 14 bolt 10.5 4:88 with detroit locker and 35 inc parenelli jones dirt grip tires

WYJAX:
Killsoon- Personally, I would forget about both of those T-cases.  They are old, heavy, and pretty much obsolete at this point.  Especially for your application.  A 305 isn't putting out a bunch of horsepower, and those 35's really aren't that big to neccessitate a 205 for the strength.  Unless you plan on building a doubler, which is only good for rock crawling really, then just stay away from them.  My first choice would be a NP208.  I know, they're chain driven.....BIG DEAL!  So are all the t-cases that are put behind every Diesel powered pickup being built today.  They're not as weak as everyone says they are.  The 208 has very distinct advantages over both the 203 and 205.  It's aluminum, so it's much lighter than both.  It also has like 2.7:1 gear reduction in low range.  That's a huge difference.  Also, anyone who has had a 208 after owning a 203 or 205 will tell you that the 208 is WAY easier to shift than either of those two.  So, to me, unless you are building a monster rock crawler, with a big block and 1 ton axles sitting on 44 inch rubber, it's a no brainer here.  Something else you may want to consider when doing your swap is securing a 700R4 tranny along with the 208 (chances are you will find the 208 behind any 700R4).  Have the R4 gone through at your local tranny shop and throw them both in at the same time.  The R4 has a deeper 1st gear and an overdrive as well.  This combo would make your truck seem like a completely different vehicle!

YZ250JV:
WYJAX- I just have to say, I agree 100% with you about the 208. I prefer it over the 203 or 205 t-cases. I have seen a mud buggy that had over 1,000 HP to the wheels and had a TH475/208 setup and I know the cases were tricked out but still, thats alot of HP! I've seen the couplers break on the 205s and the outputs on the 203s scatter like they were made of glass, and the 208s get hit by rocks and were cracked beyond repair. I will still use a 208 before any other t-case. They are cheaper and easier to rebuild than the other two and light enough to take out by yourself. Like you stated, mate it to a TH700R4 and match up the proper gears to the tire size and you are crawling. I had a 83 Blazer with 350/700/208 and 4.88s with 35s and loved it! Its the proper setup in my opinion for what I used the Blaze for.

Geo450racer:
you guys summed it up great........ i swapped out the th350/203 combo for a 700r4/208 combo and i love it so far..... do know how much of a pain it is to drop and lift a 203  or 205..... and shifting thim was like shifting a 30 year old t case which is waht they were... my 208 shifts so much easier...... its nice and light and the low range actually feels like its doing something not like my old 203 where i couldn't really even tell i was in low range...... btw im now running 35 inc tires and 4:88 gears...... its a great combo and if you wanna go slow the 4:88 gears with the 208 low range really turns the blazer into a rockcrawler  

I'm happy to hear you like the setup you have. I see it alot where guys think that the magical ratio for bigger tires (35s or larger), with or without an OD trans is 4.10s. I had the same setup you have in my Blazer and at the time my buddies were running the same tire size but would keep the stock ratios and wonder why their trannies would always burn up or they have gutless motors when attempting to climb a small hill. I was given alot of crap for having such "low" gears until I took them for a ride down the interstate doing 95 and they couldn't believe I was only running about 3300 rpms or so. I am running the same setup in my 91 other than the tranny is a 4L80E. I love it! Good times!  

hey buy ur self a daly dirve n buildt the truck strong cause if u brake down in the woods or mud good luck, 454 engine 400 tranny 205 transfer case n dana 60 front axel 14b corprear axels n 37 or 40 tires depends on what r doing mud or crawlin i know some ppl have difference opion but u r the only one the is going to drive the truck to it limits  

oooh!!!!! n pls get rid off the 305  no good 350 ok  

irather4x4:
hey buy ur self a daly dirve n buildt the truck strong cause if u brake down in the woods or mud good luck, 454 engine 400 tranny 205 transfer case n dana 60 front axel 14b corprear axels n 37 or 40 tires depends on what r doing mud or crawlin i know some ppl have difference opion but u r the only one the is going to drive the truck to it limits

Here we go with another noob.  No doubt, if you go with a 454, you will want all that other crap to hold up to mashing the stupid pedal to the floor like I'm sure this guy wants to all the time.  But, here in reality world, the setup that we all recommended for you will do a fine job.  Let alone the cost difference between a simple tranny/transfer case swap and a complete drivetrain/powertrain swap?  We don't all have mommy and daddy to pay for our wish items like this guy.  Keep it simple and drive smart, you'll be fine.