4x4 Turbo 400 to NP205 adapter - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Bram · 01-20-2004, 05:57 PM

Looking for an adapter to mate a np205 to th400, anyone got one for sale?

stelth2002 · 01-20-2004, 06:26 PM

Your on the quest to the impossible. I wish you luck though, and i have made it thru the impossible too.

Bram · 01-20-2004, 06:27 PM

For some reason I alway's take the hard way!?!?!

*dtlilly* · 01-20-2004, 09:00 PM

Have you checked advanced adaptors?

BigBlockBurris · 01-20-2004, 09:40 PM

Try this guy, I can't remember his name though. I order my 400/205 adapter new from him. Honest fellow, answered all my tech questions, and shipped promptly! I will do business with him again in a minute!

http://www.4xheaven.com/

BBB

Bram · 01-20-2004, 11:03 PM

Thanks fellows. BigBlockBurris I'll give them a call, appreciate it.

OLDCHEV4X4 · 01-20-2004, 11:53 PM

his name is Vince and there in gloversville NY

OLDCHEV4X4 · 01-21-2004, 11:07 PM

I need one too. So i called the chevy dealership today. He said he can get a 1980 400 to 205 adapter for $275. Is there any differance between the years on this adapter???
Randy
Dont mean to steal your thread, but this info might help you too.

dalejr8 · 01-22-2004, 12:30 AM

a 400 is a 400 as long it should be the same

1969 GMC · 01-22-2004, 03:53 AM

i think the spline count on the input of the 205 might have changed in the mid 80's. I dunno if this would be a problem or not.

smokekiki · 01-22-2004, 10:16 AM

Go to www.offroaddesign.com they have a write up about the differences in the 205's.The 400/205 has a bigger input shaft bearring than the 350/205.Needs to be taken apart and machined to fit the new one.Just for your info in case it is not a 400/205 case. The adapter should be the same for all 400's.

smokekiki · 01-22-2004, 10:24 AM

Check this for the info on different 205's http://www.offroaddesign.com/NP205tech.htm

dalejr8 · 01-22-2004, 11:20 PM

Thanks for the link smokekiki

*1tonswb* · 01-23-2004, 01:36 AM

In 84 or 85 they changed the shape and bolt pattern on the 205 case. It depends on what year your t-case is. Find out before you order because they will NOT interchange.

**Richard** · 01-23-2004, 02:04 AM

The 80 version will have the round pattern that bolts to the t-case. I have heard the older version refered to as the race-track bolt pattern. Just make sure you get the one you need for your t-case. I have a brand new one (race-track) that I dont need. Just want what I paid for it, was $280.

OLDCHEV4X4 · 01-23-2004, 10:53 PM

Vince at 4XHEAVEN said there is only one 400 to 205 adapter. I assumed it was for my 72 transfer case. Now i,m not so shure.
Can you bolt a 400 to a old style T.C.??

**Richard** · 01-24-2004, 02:17 AM

What 1tonswb said is correct according to the info at Off Road Design. The race track pattern is the adapter you need. But the TH400 never came in pre 73 4x4 trucks so the t-case most likely has the male input, you will need the new input gear and bearing if you have a 72 t-case. The case will have to be machined to accept the bearing, I had mine done by a local shop for $40 after I dissasembled the unit. I can post pics of the adapter one I get my camera batteries charged.

01-20-2004, 05:57 PM	#1
Bram Broke Join Date: Aug 2001 Location: West Plains,MO Posts: 385	4x4 Turbo 400 to NP205 adapter Looking for an adapter to mate a np205 to th400, anyone got one for sale? __________________ 72CheyenneSuper1ton4x4BigBlock

01-20-2004, 06:26 PM	#2
stelth2002 Young Gun wth Fast Inline Join Date: Jan 2002 Location: Idaho Posts: 1,475	Your on the quest to the impossible. I wish you luck though, and i have made it thru the impossible too. __________________ 1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!

01-20-2004, 06:27 PM	#3
Bram Broke Join Date: Aug 2001 Location: West Plains,MO Posts: 385	For some reason I alway's take the hard way!?!?! __________________ 72CheyenneSuper1ton4x4BigBlock

01-20-2004, 09:40 PM	#5
BigBlockBurris Registered User Join Date: Nov 2001 Location: Concord,NC,USA Posts: 743	400/205 adpter Try this guy, I can't remember his name though. I order my 400/205 adapter new from him. Honest fellow, answered all my tech questions, and shipped promptly! I will do business with him again in a minute! http://www.4xheaven.com/ BBB

01-20-2004, 11:03 PM	#6
Bram Broke Join Date: Aug 2001 Location: West Plains,MO Posts: 385	Thanks fellows. BigBlockBurris I'll give them a call, appreciate it. __________________ 72CheyenneSuper1ton4x4BigBlock

01-20-2004, 09:00 PM	#4
dtlilly Account Suspended Join Date: Jan 2003 Location: Shadow of Lambeau Field Posts: 5,597	Have you checked advanced adaptors?

01-20-2004, 11:53 PM	#7
OLDCHEV4X4 Registered User Join Date: Apr 2000 Location: Chester County PA, USA Posts: 1,228	his name is Vince and there in gloversville NY __________________ 72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania

01-21-2004, 11:07 PM	#8
OLDCHEV4X4 Registered User Join Date: Apr 2000 Location: Chester County PA, USA Posts: 1,228	I need one too. So i called the chevy dealership today. He said he can get a 1980 400 to 205 adapter for $275. Is there any differance between the years on this adapter??? Randy Dont mean to steal your thread, but this info might help you too. __________________ 72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania

01-22-2004, 12:30 AM	#9
dalejr8 WFO-- WIDE F!#@IN OPEN Join Date: Jul 2003 Location: Cedar Lake,In 45min. south of Chicago Posts: 191	a 400 is a 400 as long it should be the same

01-22-2004, 03:53 AM	#10
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	i think the spline count on the input of the 205 might have changed in the mid 80's. I dunno if this would be a problem or not. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

01-22-2004, 10:16 AM	#11
smokekiki Mike Join Date: Jan 2003 Location: west chester pa Posts: 2,474	Go to www.offroaddesign.com they have a write up about the differences in the 205's.The 400/205 has a bigger input shaft bearring than the 350/205.Needs to be taken apart and machined to fit the new one.Just for your info in case it is not a 400/205 case. The adapter should be the same for all 400's. __________________ 70'c/10, 71 suburban4x4 402bb, 72suburban 4/6 drop, 72k/5 4x4 blazer 4" lift 35 tires Last edited by smokekiki; 01-22-2004 at 10:20 AM.

01-22-2004, 10:24 AM	#12
smokekiki Mike Join Date: Jan 2003 Location: west chester pa Posts: 2,474	Check this for the info on different 205's http://www.offroaddesign.com/NP205tech.htm __________________ 70'c/10, 71 suburban4x4 402bb, 72suburban 4/6 drop, 72k/5 4x4 blazer 4" lift 35 tires

01-22-2004, 11:20 PM	#13
dalejr8 WFO-- WIDE F!#@IN OPEN Join Date: Jul 2003 Location: Cedar Lake,In 45min. south of Chicago Posts: 191	Thanks for the link smokekiki

01-23-2004, 01:36 AM	#14
1tonswb Account Suspended Join Date: Nov 2003 Location: Oregon Posts: 300	In 84 or 85 they changed the shape and bolt pattern on the 205 case. It depends on what year your t-case is. Find out before you order because they will NOT interchange.

01-23-2004, 02:04 AM	#15
Richard Senior Member Join Date: Dec 1999 Location: Southern California Posts: 2,839	The 80 version will have the round pattern that bolts to the t-case. I have heard the older version refered to as the race-track bolt pattern. Just make sure you get the one you need for your t-case. I have a brand new one (race-track) that I dont need. Just want what I paid for it, was $280. __________________ Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746



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01-23-2004, 10:53 PM	#16
OLDCHEV4X4 Registered User Join Date: Apr 2000 Location: Chester County PA, USA Posts: 1,228	Vince at 4XHEAVEN said there is only one 400 to 205 adapter. I assumed it was for my 72 transfer case. Now i,m not so shure. Can you bolt a 400 to a old style T.C.?? __________________ 72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania

01-24-2004, 02:17 AM	#17
Richard Senior Member Join Date: Dec 1999 Location: Southern California Posts: 2,839	What 1tonswb said is correct according to the info at Off Road Design. The race track pattern is the adapter you need. But the TH400 never came in pre 73 4x4 trucks so the t-case most likely has the male input, you will need the new input gear and bearing if you have a 72 t-case. The case will have to be machined to accept the bearing, I had mine done by a local shop for $40 after I dissasembled the unit. I can post pics of the adapter one I get my camera batteries charged. __________________ Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746

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