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#1 |
Registered User
![]() Join Date: Apr 2002
Location: Choctaw, OK
Posts: 235
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I have a TH400 and would like to install a 700R4. I think I will need my driveshaft modified and a crossmember, but I heard that I wouldn't be able to keep my original steering column. I would like to have all my bases covered before I jump into this, as I always run into little details that aren't mentioned in articles.
------------------ '69 Custom 10 SB '66 Mustang Sprint '77 Sportster
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'69 Chev Cust/10 swb, 350/700R4, 5"/6" '70 Chev C10 swb, 67 front, 454/700r4, 4"/5" '73 Chev stepper, 350/3 spd '84 Chev K20 350/4 spd '91 GMC 1500 Suburban 4x4, 350/700R4 |
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#2 |
Thats the Hillbilly way
Join Date: Jul 2001
Location: Torrance,Ca
Posts: 5,980
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Bill: Try this site ,Steve at Bowtie is very helpfull. http://www.700r4.com/
Bill ------------------ 72 3/4ton Custom Camper BB,400 air,ps,pb,leafsprings tilt,3.54 . 82 chevy silverado sb ,ps,pb pw,pd,air 350/350 Flowmaster 40. Torrance Calif. " If I knew I was going to live this long I would have taken better care of myself "
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BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen , |
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#3 |
Registered User
![]() Join Date: Apr 2000
Location: Bradenton, FL
Posts: 1,036
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I went from a 350 to 700R4 and used same steering column. Can even shift to first, it goes past 1 no promlem. Even used same linkage.
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1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters |
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#4 |
Senior Member
![]() Join Date: Mar 2001
Location: Cedar Park, TX
Posts: 686
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Make sure the 700R4 has a cable driven
speedometer connection. Might want to find out what gears you need to have your speedo read correctly (not a requirement, but really nice). I am not sure if a 400 output yoke is the same for a 700R4...the th-350 seems to be the same, someone else will need to confirm this one. If you have a short bed, now would be the time to eliminate the two-piece drive shaft and have a single one made up. Might want to get a new tranny mount either rubber or polyurathane and the crossmember will most likely need to be moved back a bit and new holes drilled. Also, depending on how you want the torque converter to act, get a kit that allows the unit to work without a computer or external switch...I think summit sells these, as well as www.700R4.com which is a very good source for info. Other big thing is to get a bracket to fit your motor that will fit your existing throttle and the TV-cable (and make absolutely sure the TV cable is set correctly, or you wont get a chance to *enjoy* that tranny for long). I have found a bracket from a TBI engine that had a 350 and 700R4 works great, will allow the use of the original throttle cable (71~72), fit the TV cable, and bolt to a stock 350 manifold....you just have to cut the top notch a little more open than it is. But it works great. If you want a newer style throttle cable that has a hole in the end instead of the ball-joint, get one for a '84 chevy 350, it too will work great, need to cut a slit in the end of the throttle lever (inside the cab, dremel works great, with a cut-off bit) and slighly enlargen the pass-thru hole in the fire wall, a small file will do this...approx 1/16" and will fit like it was stock! Good LUck. ------------------ 71 Chevy C-10 SWB Fleetside WAS:307w/3-on-the-tree NOW:350TBI/700R4/3.73 See it at www.prismnet.com/~grzanich
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71 Chevy C-10 SWB Fleetside RamJet-350/4L60e & Compushift/3.73Posi See it at www.prismnet.com/~grzanich |
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#5 |
Registered User
![]() Join Date: Apr 2002
Location: Choctaw, OK
Posts: 235
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Thanks so much for the info all of you. I'm not worried about the tailshaft yoke yet, but one of my frinds has a '72 w/ a TH350, and another has an '86 Chevy, so I'll be taking measurements, comparing parts, and such, before I start on this project, which will probably be in the fall. I have only been registered on the message board a couple of days and have already answered a couple of questions I've wondered about for a couple of years. I'm going to print this out so I don't lose/ forget it.
------------------ '69 Custom 10 SB '66 Mustang Sprint '77 Sportster
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'69 Chev Cust/10 swb, 350/700R4, 5"/6" '70 Chev C10 swb, 67 front, 454/700r4, 4"/5" '73 Chev stepper, 350/3 spd '84 Chev K20 350/4 spd '91 GMC 1500 Suburban 4x4, 350/700R4 |
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#6 |
Junior Member
Join Date: Sep 2001
Location: Phx,Az USA
Posts: 67
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I just did the conv. from a 350ci/T400 to a 350ci/7004 from bowtie www.700r4.com and I love it. Those guys helped out tons and the only thing I would do different is order the crossmember they sell since it would have saved me an hour or two in mods. I gave them my rear axle ratio & tire size so the trans came with the correct gears and in the month I have been driving in the Phx heat (mid 90's already) it has worked perfect!!!!
I just thought you might want to hear from someone who just did the work. 1 Leg Lance |
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