4-speed to th350 conversion. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

super72bb · 05-13-2005, 12:36 PM

I am sure this has been covered so, sorry to post an already beaten to death subject... but the forum search is not working.

I had thought about installing a 700r4 in my truck but I think I am just going to build up a th350 instead.

I guess I will need a Th350 with all of it's linkage, flexplate ect. and a np 205 with the factory adapter. My question is, is this just a straight bolt in, without moving the transfer case Xmember or modifing drivelines?

And secondly can anyone tell me a certain donor year range that will work best as the 69-72 4x4's are in pretty short supply around here.

Thanks for your help on what I am sure is already a heavily hashed over subject.

BUDDY · 05-30-2005, 12:37 PM

So do you have a 4-speed manual in your truck now? The changeover is pretty straightforward, as long as you can find a truck with all of it's drivetrain. That should be pretty easy as well, because these two versions were definately the most common available for these trucks.

Good luck,

Buddy

Americanrider · 05-30-2005, 06:37 PM

Are you running a 205 behind your th400 now?

Fordeater · 05-31-2005, 01:02 AM

why not put in a th400? They are stronger and IMO a better tranny.

05-13-2005, 12:36 PM	#1
super72bb Senior Member Join Date: Jan 2002 Location: calgary,Alberta,Canada Posts: 387	4-speed to th350 conversion. I am sure this has been covered so, sorry to post an already beaten to death subject... but the forum search is not working. I had thought about installing a 700r4 in my truck but I think I am just going to build up a th350 instead. I guess I will need a Th350 with all of it's linkage, flexplate ect. and a np 205 with the factory adapter. My question is, is this just a straight bolt in, without moving the transfer case Xmember or modifing drivelines? And secondly can anyone tell me a certain donor year range that will work best as the 69-72 4x4's are in pretty short supply around here. Thanks for your help on what I am sure is already a heavily hashed over subject. __________________ 1972 CHEYENNE SUPER SWB BLACK. 402 BB, TH400, AIR, TILT, TACH, BUCKETS, CRUISE, AM/FM, 8 TRACK. My build thread: http://67-72chevytrucks.com/vboard/s...=1#post7120181

05-30-2005, 12:37 PM	#2
BUDDY Global warming is a myth Join Date: Apr 2003 Location: Henderson, NV Posts: 208	So do you have a 4-speed manual in your truck now? The changeover is pretty straightforward, as long as you can find a truck with all of it's drivetrain. That should be pretty easy as well, because these two versions were definately the most common available for these trucks. Good luck, Buddy __________________ Henderson, NV 1972 K5 - Lifelong project - Needs Time, Place, Help & Parts!! 1990 K5 with 37's 2003 Discovery SE7 - Wife's

05-30-2005, 06:37 PM	#3
Americanrider Registered User Join Date: Dec 2004 Location: NW, WA. Posts: 1,421	Are you running a 205 behind your th400 now? Last edited by Americanrider; 05-30-2005 at 06:38 PM.

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05-31-2005, 01:02 AM	#4
Fordeater Junior Member Join Date: Dec 2004 Location: San Antonio, Tx Posts: 57	why not put in a th400? They are stronger and IMO a better tranny.



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