Tranny swap question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70 CST 4X4 · 06-09-2003, 03:08 PM

I have a sm465/ np205 in my 70 4x4 now. I got a th350 from a 69 4x4 and need to know if i need to get a new adapter or just the sleeve that goes from np205 splines to th350 splines (coupling sleeve?).
I have been told by someone that all I need is the sleeve, but not sure he knows his stuff.
Also I will be looking for the part(s) that I will need if you have it(them) for sale.
Thanks

**CUSTOM/10** · 06-09-2003, 04:00 PM

I believe you'll find that the sleeves are not interchangable from the auto set up and the standard set up. Not only are the sleeves differant, but the splines on the auto transfercase are fine and the splines on the standard are course. You will have to either find a transfercase that was on an auto trany or give Advanced Adapters a call and see if they make an adapter that will allow you to put an auto trany on a standard tranfercase.

I changed my truck over and had to swap the transfercase at the same time.

Good luck finding what you need !!!

70 CST 4X4 · 06-09-2003, 06:53 PM

Thanks custom10.
I talked to a local 4x4 parts guy who told me I needed an th350/ np205 adapter, power coupling(sleeve), and possibly a different input shaft for the np 205 (a finer splined shaft for automatics)
Anybody confirm this and have these parts, or know where to get them?

ljbear · 06-09-2003, 09:42 PM

70 CST,

Give Parts Mike a call or try his forum. The web page has his phone and email if you want to talk with him. He's in Auburn, CA and if he doesn't have the part he probably knows where to find it. Between him and his brother I've never been unable to find what I was after.

Larry

70 CST 4X4 · 06-09-2003, 09:49 PM

Thanks Larry! That sounds good. He is in California too, that helps with shipping!!
Thanks!
Jeff

ljbear · 06-09-2003, 10:38 PM

Jeff,

Between Mike and Bill they can get the part you need and answer any questions you have. Both have been wheelin longer than some of us are old.

Larry

70 CST 4X4 · 06-10-2003, 03:21 PM

For future reference Advance Adapters makes a New th350 to np 205 adapter and even parts to mate auto trannys to manual style transfer cases.

70 CST 4X4 · 06-11-2003, 11:05 AM

Thanks for the replies. I have an adapter being sent from a member. I thought I would find one here.
Thanks

trukman1 · 06-17-2003, 07:22 AM

For future reference...going to www.4x4Heaven.com will save you a ton of money on T/C parts! Great people, Great Service and Great Parts!

70 CST 4X4 · 06-17-2003, 11:40 AM

When I try the link it takes me to autobytel.com.
Tried entering the address directly and still goes to autobytel.com.
Let me know trukman if this is correct. I am interested in saving money! Thanks for the info.

{ EDIT}
Thanks I have all the parts I need for this now.

JimKshortstep4x4 · 06-26-2003, 08:35 AM

Trukman,

All that I get is Autobytel.

What is going on?

Please respond.

Jim

**CUSTOM/10** · 06-26-2003, 09:25 AM

See if this works if not go to your internet brouser and do a search for www.advaneadapters.com. Thats how I found it. Looks like it's part# 50-5301 / $273.20.

www.advanceadapters.com

06-09-2003, 03:08 PM	#1
70 CST 4X4 Have A Nice Day! Join Date: May 2003 Location: California Posts: 355	Tranny swap question I have a sm465/ np205 in my 70 4x4 now. I got a th350 from a 69 4x4 and need to know if i need to get a new adapter or just the sleeve that goes from np205 splines to th350 splines (coupling sleeve?). I have been told by someone that all I need is the sleeve, but not sure he knows his stuff. Also I will be looking for the part(s) that I will need if you have it(them) for sale. Thanks __________________ 1970 CST K10 350/350/205 Short Bed - Fleetside Tach-Tilt-A/C-Tow Hooks Front & Rear Disc Brakes Front & Rear Posi 3.73 Gears 30 Gallon Stainless Fuel Tank SOLD 01/18 !!!!! 2007 2500 HD Classic Crew Cab LT2 4X4 Duramax LBZ

06-09-2003, 04:00 PM	#2
CUSTOM/10 Senior Member Join Date: May 2003 Location: Sandown, NH Posts: 2,850	Trany Swap I believe you'll find that the sleeves are not interchangable from the auto set up and the standard set up. Not only are the sleeves differant, but the splines on the auto transfercase are fine and the splines on the standard are course. You will have to either find a transfercase that was on an auto trany or give Advanced Adapters a call and see if they make an adapter that will allow you to put an auto trany on a standard tranfercase. I changed my truck over and had to swap the transfercase at the same time. Good luck finding what you need !!!

06-09-2003, 06:53 PM	#3
70 CST 4X4 Have A Nice Day! Join Date: May 2003 Location: California Posts: 355	Thanks custom10. I talked to a local 4x4 parts guy who told me I needed an th350/ np205 adapter, power coupling(sleeve), and possibly a different input shaft for the np 205 (a finer splined shaft for automatics) Anybody confirm this and have these parts, or know where to get them? __________________ 1970 CST K10 350/350/205 Short Bed - Fleetside Tach-Tilt-A/C-Tow Hooks Front & Rear Disc Brakes Front & Rear Posi 3.73 Gears 30 Gallon Stainless Fuel Tank SOLD 01/18 !!!!! 2007 2500 HD Classic Crew Cab LT2 4X4 Duramax LBZ Last edited by 70 CST 4X4; 06-09-2003 at 06:55 PM.

06-09-2003, 09:42 PM	#4
ljbear Registered User Join Date: Jan 2003 Location: Emmett, Idaho Posts: 858	70 CST, Give Parts Mike a call or try his forum. The web page has his phone and email if you want to talk with him. He's in Auburn, CA and if he doesn't have the part he probably knows where to find it. Between him and his brother I've never been unable to find what I was after. Larry __________________ Larry 72 Chevy SWB 4x4 71 Chevy SWB 4x4 My Work Truck "Don't confuse enthusiasm with capability"

06-09-2003, 09:49 PM	#5
70 CST 4X4 Have A Nice Day! Join Date: May 2003 Location: California Posts: 355	Thanks Larry! That sounds good. He is in California too, that helps with shipping!! Thanks! Jeff __________________ 1970 CST K10 350/350/205 Short Bed - Fleetside Tach-Tilt-A/C-Tow Hooks Front & Rear Disc Brakes Front & Rear Posi 3.73 Gears 30 Gallon Stainless Fuel Tank SOLD 01/18 !!!!! 2007 2500 HD Classic Crew Cab LT2 4X4 Duramax LBZ

06-09-2003, 10:38 PM	#6
ljbear Registered User Join Date: Jan 2003 Location: Emmett, Idaho Posts: 858	Jeff, Between Mike and Bill they can get the part you need and answer any questions you have. Both have been wheelin longer than some of us are old. Larry __________________ Larry 72 Chevy SWB 4x4 71 Chevy SWB 4x4 My Work Truck "Don't confuse enthusiasm with capability"

06-10-2003, 03:21 PM	#7
70 CST 4X4 Have A Nice Day! Join Date: May 2003 Location: California Posts: 355	For future reference Advance Adapters makes a New th350 to np 205 adapter and even parts to mate auto trannys to manual style transfer cases. __________________ 1970 CST K10 350/350/205 Short Bed - Fleetside Tach-Tilt-A/C-Tow Hooks Front & Rear Disc Brakes Front & Rear Posi 3.73 Gears 30 Gallon Stainless Fuel Tank SOLD 01/18 !!!!! 2007 2500 HD Classic Crew Cab LT2 4X4 Duramax LBZ

06-11-2003, 11:05 AM	#8
70 CST 4X4 Have A Nice Day! Join Date: May 2003 Location: California Posts: 355	Thanks for the replies. I have an adapter being sent from a member. I thought I would find one here. Thanks __________________ 1970 CST K10 350/350/205 Short Bed - Fleetside Tach-Tilt-A/C-Tow Hooks Front & Rear Disc Brakes Front & Rear Posi 3.73 Gears 30 Gallon Stainless Fuel Tank SOLD 01/18 !!!!! 2007 2500 HD Classic Crew Cab LT2 4X4 Duramax LBZ

06-17-2003, 07:22 AM	#9
trukman1 Registered User Join Date: Apr 2001 Location: Beavercreek, Ohio 45431 Posts: 737	For future reference...going to www.4x4Heaven.com will save you a ton of money on T/C parts! Great people, Great Service and Great Parts!

06-17-2003, 11:40 AM	#10
70 CST 4X4 Have A Nice Day! Join Date: May 2003 Location: California Posts: 355	4X4 Heaven When I try the link it takes me to autobytel.com. Tried entering the address directly and still goes to autobytel.com. Let me know trukman if this is correct. I am interested in saving money! Thanks for the info. { EDIT} Thanks I have all the parts I need for this now. __________________ 1970 CST K10 350/350/205 Short Bed - Fleetside Tach-Tilt-A/C-Tow Hooks Front & Rear Disc Brakes Front & Rear Posi 3.73 Gears 30 Gallon Stainless Fuel Tank SOLD 01/18 !!!!! 2007 2500 HD Classic Crew Cab LT2 4X4 Duramax LBZ Last edited by 70 CST 4X4; 06-20-2003 at 06:05 PM.

06-26-2003, 08:35 AM	#11
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Trukman, All that I get is Autobytel. What is going on? Please respond. Jim

06-26-2003, 09:25 AM	#12
CUSTOM/10 Senior Member Join Date: May 2003 Location: Sandown, NH Posts: 2,850	Advanced adapters See if this works if not go to your internet brouser and do a search for www.advaneadapters.com. Thats how I found it. Looks like it's part# 50-5301 / $273.20. www.advanceadapters.com Last edited by CUSTOM/10; 06-26-2003 at 09:31 AM.

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