700R4 Swap Succesful!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sonny · 10-21-2005, 06:14 PM

I had the TH400 swapped out for a 700R4 and it has been the best money spent on my truck so far. Stepping up to power brakes comes in a close second! I suggest to everyone to have the swap done. I will have some pics soon.

Sonny

86swb · 10-21-2005, 07:31 PM

What year 700R4 did you use? What does it take to swap out one of these. Have you checked you fuel mileage yet? Look forward to the pictures. I have been thinking of doing this but at a latter date. Too much going on right now with a daughter getting married and all.$$$$$

powell72 · 10-21-2005, 11:21 PM

Having that extra gear sure is nice isn't it? Especially with the steep gears some of these trucks had.

Jakes-66-K10 · 10-22-2005, 02:07 AM

Yeah, makes me smile too everytime mine goes in fourth gear as well.

73737373 · 10-22-2005, 05:41 AM

Did you do it yourself? For those of us who are more inclined to just write a check, where did you have it done, and if you don't mind me asking, how much did it cost?

86swb · 10-22-2005, 06:20 AM

Yes Sonny, how about some answers?

**RPOZ11** · 10-22-2005, 05:18 PM

I havent done this on my 72 yet, but I did it on my 70 Nova and I had to move the X-member back, I believe that the trans lines are the same from T-400 and T-350 locations on the housing to the radiator, shorten the driveshaft(s), and then the obvious linkage issues.
On my Nova, the stock stamped/curved linkage arm wasnt long enough to engage 1st gear, so on our trucks, I dont know what the linkage issues are as of yet...
Thats my 2$...

86swb · 10-22-2005, 05:31 PM

2$ worth is better than 2cents worth.

72MARIO · 10-22-2005, 08:55 PM

The Lokar linkages are perfect to use on our trucks. They also allow you to un the exhaust over the trans crossmember with out the linkage being in the way.

**RPOZ11** · 10-23-2005, 08:34 PM

Do you have any pics of a Lokar linkage in a 67-72 application with a 700R4?
Link to that site?

86swb · 10-23-2005, 09:23 PM

I would like to see that picture too if you have one. Or if anybody has one.

bigblue1968 · 10-25-2005, 09:51 PM

yea SONNY let us know alittle about the install. I.E. cost

LUV2XCLR8 · 10-25-2005, 09:55 PM

Quote:

Originally Posted by Sonny

I had the TH400 swapped out for a 700R4 and it has been the best money spent on my truck so far. Stepping up to power brakes comes in a close second! I suggest to everyone to have the swap done. I will have some pics soon.

Sonny

Waiting for the pic's

jracca · 10-26-2005, 09:56 PM

I did this swap, from a th350 short tail shaft to a 700r4, just moved the crossmember back and sent the driveshaft out to be shortened in my
1971 GMC 1/2 ton LWB. I had a 12 bolt rear with 4:10 gears and went from 8mpg on the highway to 15mpg, definitely worth it.

In my current project I am using a gear vendors overdrive setup since I do not trust the 700r4 to stand up to towing use

Sonny · 10-26-2005, 10:54 PM

Pictures will come soon. I had a reputable shop intown do the work for me. I traded my tranny and some coin for the 700r4. He installed it 4 me including shortening the shaft, misc parts and pieces, and even threw in a 12 month warranty. He did a great job too. I have a push button switch for TC lock up, but I am going to replace it with a momentary switch using a holding circuit through the brake pedal switch to disengage the TC when I hit the brake.

Sonny
1968 Chevy C-10 Shortbed

phantom dually · 10-26-2005, 11:13 PM

Sounds like you spent some $$$$ for that?

*hoser* · 11-08-2005, 07:59 PM

Quote:

Originally Posted by Sonny

Pictures will come soon. I had a reputable shop intown do the work for me. I traded my tranny and some coin for the 700r4. He installed it 4 me including shortening the shaft, misc parts and pieces, and even threw in a 12 month warranty. He did a great job too. I have a push button switch for TC lock up, but I am going to replace it with a momentary switch using a holding circuit through the brake pedal switch to disengage the TC when I hit the brake.

Sonny
1968 Chevy C-10 Shortbed

So far here is what I have done for my converter lockup, some day I will hook it up to the brake switch so I dont have to worry about killing the engine in a pannic stop....

http://12.215.122.222/700R4.htm

djtlaz · 11-08-2005, 11:00 PM

I'm doing it to my 71 4x4 right now. It is going to run me about $2200. But is is worth every penny. I did it to a 72 4x4 I had and loved it. You have to move the trans mount the transfer case mount. You also have to add length to the front shaft and shorten the rear shaft. I'll hook the lock up converter to my brake. Adding the 4th gear was wonderful as well as the low first gear I can take off faster than ever before.

gregbr · 11-09-2005, 05:40 AM

I think you can buy a pressure switch to install in the trans that will lock the TC at a certain pressure. Greg

67ChevyRedneck · 11-09-2005, 09:25 AM

Bowtie overdrives sells a kit for about 70 bucks to lock up the TC, it also has a switch that you connect to your brakes to unlock it. I'm going to get a new rebuilt tranny from them and get thier kit in a few months.

I can vouch for the brake switch as being needed. I only had a pressure lock up switch on my 700R4 and I had to slam the brakes on my 67 to miss a deer. I missed the deer but in the process the engine died and I lost my brakes. Power brake trucks take forever to stop without the engine running!

10-21-2005, 06:14 PM	#1
Sonny Active Member Join Date: Jan 2004 Location: Centerville, GA Posts: 240	700R4 Swap Succesful!!! I had the TH400 swapped out for a 700R4 and it has been the best money spent on my truck so far. Stepping up to power brakes comes in a close second! I suggest to everyone to have the swap done. I will have some pics soon. Sonny

10-21-2005, 07:31 PM	#2
86swb Born a Chevy Man Join Date: Apr 2005 Location: Navarre, Florida Posts: 10,221	Re: 700R4 Swap Succesful!!! What year 700R4 did you use? What does it take to swap out one of these. Have you checked you fuel mileage yet? Look forward to the pictures. I have been thinking of doing this but at a latter date. Too much going on right now with a daughter getting married and all.$$$$$ __________________ John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 1986 Chevy SWB Silverado 1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS

10-21-2005, 11:21 PM	#3
powell72 Senior Member Join Date: Jan 2005 Location: Loveland Co. Posts: 3,098	Re: 700R4 Swap Succesful!!! Having that extra gear sure is nice isn't it? Especially with the steep gears some of these trucks had. __________________ Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html

10-22-2005, 02:07 AM	#4
Jakes-66-K10 Registered User Join Date: Aug 2004 Location: Idaho Posts: 640	Re: 700R4 Swap Succesful!!! Yeah, makes me smile too everytime mine goes in fourth gear as well.

10-22-2005, 05:41 AM	#5
73737373 Registered User Join Date: Sep 2005 Location: Oklahoma USA Posts: 1,000	Re: 700R4 Swap Succesful!!! Did you do it yourself? For those of us who are more inclined to just write a check, where did you have it done, and if you don't mind me asking, how much did it cost? __________________ 1968 Custom SWB, 327/3 speed OTC 1969 CST LWB, 402/400 1970 CST LWB, 402/400 1970 Sierra Grande LWB, 350/350 1971 Cheyenne LWB, 350/350 1972 Cheyenne Super LWB, 402/400 1972 Sierra Grande LWB, 402/400 1979 Silverado LWB, 350/350 1984 Suburban 1990 454 SS 1991 Silverado, X-cab, 4.3/5 speed Getrag 2005 Silverado Crew Cab Corvettes: 75, 77, 78, 93, 96

10-22-2005, 06:20 AM	#6
86swb Born a Chevy Man Join Date: Apr 2005 Location: Navarre, Florida Posts: 10,221	Re: 700R4 Swap Succesful!!! Yes Sonny, how about some answers? __________________ John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 1986 Chevy SWB Silverado 1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS

10-22-2005, 05:18 PM	#7
RPOZ11 72 BB C30 Super LongHorn Join Date: Nov 2002 Location: Chavez Ravine Posts: 1,606	Re: 700R4 Swap Succesful!!! I havent done this on my 72 yet, but I did it on my 70 Nova and I had to move the X-member back, I believe that the trans lines are the same from T-400 and T-350 locations on the housing to the radiator, shorten the driveshaft(s), and then the obvious linkage issues. On my Nova, the stock stamped/curved linkage arm wasnt long enough to engage 1st gear, so on our trucks, I dont know what the linkage issues are as of yet... Thats my 2$... __________________ 72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS

10-22-2005, 05:31 PM	#8
86swb Born a Chevy Man Join Date: Apr 2005 Location: Navarre, Florida Posts: 10,221	Re: 700R4 Swap Succesful!!! 2$ worth is better than 2cents worth. __________________ John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 1986 Chevy SWB Silverado 1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS

10-22-2005, 08:55 PM	#9
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,052	Re: 700R4 Swap Succesful!!! The Lokar linkages are perfect to use on our trucks. They also allow you to un the exhaust over the trans crossmember with out the linkage being in the way. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

10-23-2005, 08:34 PM	#10
RPOZ11 72 BB C30 Super LongHorn Join Date: Nov 2002 Location: Chavez Ravine Posts: 1,606	Re: 700R4 Swap Succesful!!! Do you have any pics of a Lokar linkage in a 67-72 application with a 700R4? Link to that site? __________________ 72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS

10-23-2005, 09:23 PM	#11
86swb Born a Chevy Man Join Date: Apr 2005 Location: Navarre, Florida Posts: 10,221	Re: 700R4 Swap Succesful!!! I would like to see that picture too if you have one. Or if anybody has one. __________________ John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 1986 Chevy SWB Silverado 1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS

10-25-2005, 09:51 PM	#12
bigblue1968 Registered User Join Date: Oct 2005 Location: Warner Robins, Georgia Posts: 34	Re: 700R4 Swap Succesful!!! yea SONNY let us know alittle about the install. I.E. cost

10-26-2005, 09:56 PM	#14
jracca Registered User Join Date: Oct 2005 Location: Dallas, TX Posts: 49	Re: 700R4 Swap Succesful!!! I did this swap, from a th350 short tail shaft to a 700r4, just moved the crossmember back and sent the driveshaft out to be shortened in my 1971 GMC 1/2 ton LWB. I had a 12 bolt rear with 4:10 gears and went from 8mpg on the highway to 15mpg, definitely worth it. In my current project I am using a gear vendors overdrive setup since I do not trust the 700r4 to stand up to towing use

10-26-2005, 10:54 PM	#15
Sonny Active Member Join Date: Jan 2004 Location: Centerville, GA Posts: 240	Re: 700R4 Swap Succesful!!! Pictures will come soon. I had a reputable shop intown do the work for me. I traded my tranny and some coin for the 700r4. He installed it 4 me including shortening the shaft, misc parts and pieces, and even threw in a 12 month warranty. He did a great job too. I have a push button switch for TC lock up, but I am going to replace it with a momentary switch using a holding circuit through the brake pedal switch to disengage the TC when I hit the brake. Sonny 1968 Chevy C-10 Shortbed

10-26-2005, 11:13 PM	#16
phantom dually Project92 SWB stepside Join Date: Feb 2003 Location: Louisville KY Posts: 4,793	Re: 700R4 Swap Succesful!!! Sounds like you spent some $$$$ for that? __________________ 92 C1500 stepside 496 Stroker Competiton Engineering Ladder bars/QA1 coilovers. Dana 60 rear with 4.10 gear and posi. Bonspeed Palisade 20x12 in rear w/335/30/20 and 20x8.5 front w/245/40/20. 5/8 drop with Belltech springs/DJM spindles/drop shocks. WWS Progress thread http://67-72chevytrucks.com/vboard/s...d.php?t=140448



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11-08-2005, 11:00 PM	#18
djtlaz Registered User Join Date: Sep 2005 Location: Tempe,AZ Posts: 38	Re: 700R4 Swap Succesful!!! I'm doing it to my 71 4x4 right now. It is going to run me about $2200. But is is worth every penny. I did it to a 72 4x4 I had and loved it. You have to move the trans mount the transfer case mount. You also have to add length to the front shaft and shorten the rear shaft. I'll hook the lock up converter to my brake. Adding the 4th gear was wonderful as well as the low first gear I can take off faster than ever before.

11-09-2005, 05:40 AM	#19
gregbr Senoir Member Join Date: Mar 2002 Location: Rock Hill, SC USA Posts: 1,214	Re: 700R4 Swap Succesful!!! I think you can buy a pressure switch to install in the trans that will lock the TC at a certain pressure. Greg __________________ 67 Chevy, Small back glass, Factory 4WD, Factory Shortbed, Factory V8, Lifted 4" 70 GMC Sierra Grande, Factory Shortbed, Factory 402/400 turbo, Super Custom Interior. Numbers matching with SPID & Build Sheet. 68K Original Miles. Restored 2010 70 GMC Restoration Pictures http://67-72chevytrucks.com/gallery/...00&ppuser=4424

11-09-2005, 09:25 AM	#20
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: 700R4 Swap Succesful!!! Bowtie overdrives sells a kit for about 70 bucks to lock up the TC, it also has a switch that you connect to your brakes to unlock it. I'm going to get a new rebuilt tranny from them and get thier kit in a few months. I can vouch for the brake switch as being needed. I only had a pressure lock up switch on my 700R4 and I had to slam the brakes on my 67 to miss a deer. I missed the deer but in the process the engine died and I lost my brakes. Power brake trucks take forever to stop without the engine running! __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

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