need info on a tranny swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

roaringthunder78 · 06-10-2010, 08:08 PM

I have a 69 lwb chevy 1/2 ton with a 73' "car" 350 and I believe it is a saginaw 3 on the tree. What I need to know is what all I would have to do to put in a 700R4 in place of the 3 on the tree.

Hubscrub · 06-10-2010, 08:33 PM

you need a auto crossmember, tv cable, cooler lines, a radiator with cooler hookups or a add on cooler and driveshaft will maybe need to be modified, and a auto column or a shifter in the floor not hard at all i did my 71 last year

Shyguy · 06-10-2010, 10:36 PM

Flex plate and torque converter also.

Danny

roaringthunder78 · 06-10-2010, 11:25 PM

where is the cheapest place to look for all that?

beebster · 06-11-2010, 12:47 AM

if your lucky enough to have a "9 in. tail on that turbo 350,it'll be the same size as a 700r
so the driveshaft will be the same length.
i'm doing the swap next spring, and i just bought a heavy duty,racing,1 piece driveshaft.
One less thing to worry about. LOL

raycow · 06-11-2010, 01:11 AM

You will also need a block-mounted starter to match your flexplate. The stock manual transmission starter bolts to the bellhousing.

Ray

roaringthunder78 · 06-22-2010, 09:02 AM

Thanks for the help. I might be in over my head lol

**FL71C10** · 06-22-2010, 09:11 AM

Ok, at the risk of looking stupid, what's a tv cable?

primetime · 06-22-2010, 09:28 AM

thats the cable responsible for engaging your overdrive gear. if it isn't setup properly it will destroy your transmission

**FL71C10** · 06-22-2010, 09:37 AM

Is is a mechanical switch, or electronic?

raycow · 06-22-2010, 12:27 PM

TV means throttle valve. The TV cable is a mechanical connection between your truck's throttle linkage and the throttle valve inside the transmission. The throttle valve controls oil pressure in the transmission in accordance with the amount the throttle is opened.

Ray

mrein3 · 06-22-2010, 12:50 PM

Quote:

Originally Posted by roaringthunder78

I have a 69 lwb chevy 1/2 ton with a 73' "car" 350 and I believe it is a saginaw 3 on the tree. What I need to know is what all I would have to do to put in a 700R4 in place of the 3 on the tree.

Since nobody asked I will. You are talking about a 2wd truck. Right?

If you're talking 4wd you need all the above plus the correct aftermarket output shaft, th350 to NP205 adapter, and a NP205 that originally came out of a truck with a th350.

06-10-2010, 08:08 PM	#1
roaringthunder78 Registered User Join Date: Nov 2008 Location: Guthrie, OK Posts: 4	need info on a tranny swap I have a 69 lwb chevy 1/2 ton with a 73' "car" 350 and I believe it is a saginaw 3 on the tree. What I need to know is what all I would have to do to put in a 700R4 in place of the 3 on the tree.

06-10-2010, 08:33 PM	#2
Hubscrub Cruzin Join Date: Dec 2009 Location: on the road Posts: 2,835	Re: need info on a tranny swap you need a auto crossmember, tv cable, cooler lines, a radiator with cooler hookups or a add on cooler and driveshaft will maybe need to be modified, and a auto column or a shifter in the floor not hard at all i did my 71 last year __________________ Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14 Last edited by Hubscrub; 06-10-2010 at 08:34 PM.

06-10-2010, 10:36 PM	#3
Shyguy Junior Member Join Date: Dec 2006 Location: Southeast Missouri Posts: 2,436	Re: need info on a tranny swap Flex plate and torque converter also. Danny __________________ '67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E.

06-10-2010, 11:25 PM	#4
roaringthunder78 Registered User Join Date: Nov 2008 Location: Guthrie, OK Posts: 4	Re: need info on a tranny swap where is the cheapest place to look for all that?

06-11-2010, 12:47 AM	#5
beebster Registered User Join Date: Jan 2009 Location: Aurora,Il ..born,raised and still live in the same house Posts: 286	Re: need info on a tranny swap if your lucky enough to have a "9 in. tail on that turbo 350,it'll be the same size as a 700r so the driveshaft will be the same length. i'm doing the swap next spring, and i just bought a heavy duty,racing,1 piece driveshaft. One less thing to worry about. LOL __________________ I love stock! Not really into the whole bagged, squished,chopped, drooped,cut, bent,lifted,twisted,split,decked,massaged,tubbed,jacked trend. (o.k. slightly lowered is fine) For the love of god, just drive it before you forget what the truck is supposed to look like !....LOL

06-11-2010, 01:11 AM	#6
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: need info on a tranny swap You will also need a block-mounted starter to match your flexplate. The stock manual transmission starter bolts to the bellhousing. Ray

06-22-2010, 09:02 AM	#7
roaringthunder78 Registered User Join Date: Nov 2008 Location: Guthrie, OK Posts: 4	Re: need info on a tranny swap Thanks for the help. I might be in over my head lol

06-22-2010, 09:11 AM	#8
FL71C10 Senior Member Join Date: Jun 2010 Location: Orlando, Florida Posts: 2,508	Re: need info on a tranny swap Ok, at the risk of looking stupid, what's a tv cable? __________________ 71 Chevy C10 Shortbed Stepside. LT1 with 4l60E. Just got back from painter, in assembly now.

06-22-2010, 09:28 AM	#9
primetime Registered User Join Date: Jul 2006 Location: Columbia, SC Posts: 410	Re: need info on a tranny swap thats the cable responsible for engaging your overdrive gear. if it isn't setup properly it will destroy your transmission __________________ 1968 Chevy C10 swb fleetside 2005 Chevy Silverado crew cab (SS) 1977 Goldwing cafe racer 1977 Chevy nova (first car/ first love)

06-22-2010, 09:37 AM	#10
FL71C10 Senior Member Join Date: Jun 2010 Location: Orlando, Florida Posts: 2,508	Re: need info on a tranny swap Is is a mechanical switch, or electronic? __________________ 71 Chevy C10 Shortbed Stepside. LT1 with 4l60E. Just got back from painter, in assembly now.

06-22-2010, 12:27 PM	#11
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: need info on a tranny swap TV means throttle valve. The TV cable is a mechanical connection between your truck's throttle linkage and the throttle valve inside the transmission. The throttle valve controls oil pressure in the transmission in accordance with the amount the throttle is opened. Ray



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