Trans and Transfer case questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Big Blue · 03-10-2005, 12:38 AM

I need some help on this.

1. What is a part time set up, and or full time?
2. Which is better?
3. If part time is what i think it means, thats what i want to put in my newly built truck.
4. What kind of trans/transfer will fit in a 78 blazer frame with a 81 cab on it? 5. What modifacations will have to be do if any?

350 engine, All blazer parts are stll being used on the frame.

Thanks John

clarkjw24 · 03-10-2005, 01:02 AM

What tranny do you have.
NP203 all are fulltime unless a part time kit have been installed. Case iron chain driven, one heavy mofo
NP205 most desired case, part time all gear cast iron, not as heavy mofo
NP208 light weight aluminum housing, chain driven, good low
NP241 same as above but with a different ratio some 88s and all 89 autos
You could get :
TH350/NP203 full time(factory built)
Th350/NP203 with aftermarket part time kit
Th350/NP205 part time (factory) <--best all gear driven cast iron case
Th350/NP208 with aftermarket tranny tailshaft adaptor
Th400/NP203 rare
Th400/NP205 hard to find
SM465/NP203 rarer
SM465/NP205 most common
SM465/NP208
700R4/NP208
700R4/NP205 with aftermarket adaptor
700R4/NP241

I prob missed something. It depends on what tranny you have to work with and what kind of use the truck will be for.

Prerunner1982 · 03-10-2005, 01:10 AM

the NP 205 should have a PTO as well if that is of any use.

Big Blue · 03-10-2005, 10:08 AM

Thanks clarkjw24 and Prerunner1982,
I have no trans or transfer at this time. Thats why i need to know what type i should look for. This will be my sunday diver,maybe tuesday aswell. I'll even put back the factory type. If they came in part time. If not then original will do for now.

Looking at your information the Th350/NP205 is what i should go with .

Thanks John

03-10-2005, 12:38 AM	#1
Big Blue Registered User Join Date: Feb 2005 Location: Northeast--Bethlehem, Pennslyvania Posts: 642	Trans and Transfer case questions I need some help on this. 1. What is a part time set up, and or full time? 2. Which is better? 3. If part time is what i think it means, thats what i want to put in my newly built truck. 4. What kind of trans/transfer will fit in a 78 blazer frame with a 81 cab on it? 5. What modifacations will have to be do if any? 350 engine, All blazer parts are stll being used on the frame. Thanks John __________________ Big Blue ( John ) 79 Chevy Pick up.....My Dailey STILL Working on a frame up: 1987 Truck body on a 78 Blazer frame. Need cab blasted to start project. Got the cab BLASTED, Now Prep and Paint. Started to lay SOME BONDO and primer. Done, Ordering paint. Got paint, Stuff painted,Cab,Fenders, Hood more later. 9/7/2015 Got the clear coat on,now time to take one off. Started to put things back (What a nightmare) like the heating and AC stuff,inside wire harness, outside AC unit and booster, still more. May 2016, still working on the inside. Got duck work in,heating and AC. Radio (stock) in dash with after market in console later, Speaker are hooked up, Steering column is in. Getting ready to drop the cab onto the frame, Working on engine now since I have the room. Well here it is 2018, got the engine in and it runs, now I need to get the exhaust system in so I can adjust the lifters, to loud right now. Got the exhaust on now I am waiting for the break parts to come in.

03-10-2005, 01:02 AM	#2
clarkjw24 I like cheese Join Date: Aug 2004 Location: McBee, SC Posts: 192	What tranny do you have. NP203 all are fulltime unless a part time kit have been installed. Case iron chain driven, one heavy mofo NP205 most desired case, part time all gear cast iron, not as heavy mofo NP208 light weight aluminum housing, chain driven, good low NP241 same as above but with a different ratio some 88s and all 89 autos You could get : TH350/NP203 full time(factory built) Th350/NP203 with aftermarket part time kit Th350/NP205 part time (factory) <--best all gear driven cast iron case Th350/NP208 with aftermarket tranny tailshaft adaptor Th400/NP203 rare Th400/NP205 hard to find SM465/NP203 rarer SM465/NP205 most common SM465/NP208 700R4/NP208 700R4/NP205 with aftermarket adaptor 700R4/NP241 I prob missed something. It depends on what tranny you have to work with and what kind of use the truck will be for. __________________ Cruiser: 1972 K5, 400/TH350/NP205, D44 and 12Bolt, 35 TSLs. Trail rig: 86 K5, 350 TBI, SM465/NP205, 5.13s, 14ff locked, h1 beadlocks, 42" TSLs, 64" rears, 56" fronts, D60 locked, 35pline, drive flanges, crossover, hydro assist, OBA. Tow rig: 2002 F350 PSD CC Dually FX4, chipped, cold air intake, BFGs

03-10-2005, 10:08 AM	#4
Big Blue Registered User Join Date: Feb 2005 Location: Northeast--Bethlehem, Pennslyvania Posts: 642	Thanks clarkjw24 and Prerunner1982, I have no trans or transfer at this time. Thats why i need to know what type i should look for. This will be my sunday diver,maybe tuesday aswell. I'll even put back the factory type. If they came in part time. If not then original will do for now. Looking at your information the Th350/NP205 is what i should go with . Thanks John __________________ Big Blue ( John ) 79 Chevy Pick up.....My Dailey STILL Working on a frame up: 1987 Truck body on a 78 Blazer frame. Need cab blasted to start project. Got the cab BLASTED, Now Prep and Paint. Started to lay SOME BONDO and primer. Done, Ordering paint. Got paint, Stuff painted,Cab,Fenders, Hood more later. 9/7/2015 Got the clear coat on,now time to take one off. Started to put things back (What a nightmare) like the heating and AC stuff,inside wire harness, outside AC unit and booster, still more. May 2016, still working on the inside. Got duck work in,heating and AC. Radio (stock) in dash with after market in console later, Speaker are hooked up, Steering column is in. Getting ready to drop the cab onto the frame, Working on engine now since I have the room. Well here it is 2018, got the engine in and it runs, now I need to get the exhaust system in so I can adjust the lifters, to loud right now. Got the exhaust on now I am waiting for the break parts to come in. Last edited by Big Blue; 03-10-2005 at 10:13 AM.

03-10-2005, 01:10 AM	#3
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	the NP 205 should have a PTO as well if that is of any use.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.