Those with 700R4 please read. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

breezy · 11-30-2010, 09:32 PM

I have a 71 SWB I'm getting ready to put a 700 in this weekend. Do you have to drill holes in frame when moving cross member, or are there holes there that line up? Do you need the upper part of the cross member or can it be removed? Any other things I need to look at before proceding. Thanks for any help.

jay6891 · 11-30-2010, 09:45 PM

Been a while but I think that you have to drill new holes. Maybe one on each side lines up. Dang old age, CRS is getting worse and worse. I left the upper part of my cross member on. No bolts in it but still there.

Hubscrub · 11-30-2010, 09:55 PM

yes i drilled holes but i made me a crossmember i had a manual

**nightmare** · 11-30-2010, 09:54 PM

I think that the 4 (two upper and two lower) back holes line up, so the fronts would need to be drilled. I didn't move the crossmember when I installed my 700, I came up with something else to compensate for the difference in length. I cut a 1/4" plate and mounted that to the crossmember, then set the transmission mount on that.

raycow · 12-01-2010, 04:18 PM

I think nightmare has the best answer on the crossmember. Bolt it to the existing TH400 holes, which will put it about 4" too far to the rear. Then bolt or weld an extension on it to reach the 700R4 mount. This way you will have plenty of clearance if you ever need to pull the pan.

Ray

Richard H. · 12-01-2010, 05:53 PM

This may help with the carb.
http://purplesagetradingpost.com/sum...o/700R4p1.html

hth.

1-PU70 · 12-01-2010, 06:02 PM

I kept the original cross member and had to drill holes. I used a long, I mean long drill bit so I could go through the bottom hole and drill the top one.

breezy · 11-30-2010, 10:10 PM

Thanks guys. Anybody else??

Strut · 11-30-2010, 10:22 PM

You'll need a TV Cable too.... I bought a conversion kit when I did mine. This is what I used:

http://racetransmissions.com/store/p...1339cb856e4987

I also used a tubular cross member:

I had to shorten my driveshaft too...

classicchev · 11-30-2010, 10:24 PM

Im pretty sure I did not drill holes, but that was a long time ago.

breezy · 11-30-2010, 11:27 PM

Got the TV cable and dipstick, wired the brake light/low pressure switch. I need a tailshaft from a caprice I have been readig that it puts the mount in the same place as the 400, which is what I have now.

breezy · 11-30-2010, 11:32 PM

I just went and looked at my quadrajet and it has a extra mounting pi on the linkage. Would this work for the TV cable? Not sure if the geometry is corrct for the TV or it may have been for a 350 turbo tranny. Anybody else have 700 with qudrajet hooked to it?

breezy · 12-01-2010, 09:37 PM

Ok think I got it figured out. I done a little searching and figured out the new shaft I out in the carb has the correct linkage for a 700. Must have been from a early 80's car. So that's solved. Also found out a tail housing from a early 80's caprice has the mounting boss on it. Supposibly it is positioned at the same spot as the 400. We shall see come thurs. night or friday morning. Looks like it should be a fairly easy swap. If I remember I'll take the camara for pics.

11-30-2010, 09:32 PM	#1
breezy Registered User Join Date: Oct 2010 Location: Palaskifield,Mo. Posts: 71	Those with 700R4 please read. I have a 71 SWB I'm getting ready to put a 700 in this weekend. Do you have to drill holes in frame when moving cross member, or are there holes there that line up? Do you need the upper part of the cross member or can it be removed? Any other things I need to look at before proceding. Thanks for any help.

11-30-2010, 09:45 PM	#2
jay6891 Car Knocker Join Date: May 2001 Location: jefferson,arkansas Posts: 664	Re: Those with 700R4 please read. Been a while but I think that you have to drill new holes. Maybe one on each side lines up. Dang old age, CRS is getting worse and worse. I left the upper part of my cross member on. No bolts in it but still there. __________________ 68 c-10,91 sportside bed,350 .030 over,4 bolt,10-1 comp,2.05 intake/1.94 exhaust,1.6 Harland Sharp roller rockers,edelbrock rpm cam and intake w/750 carb, 700r4, 3.73 gears,Jacabbs Electronic Igntion w/Accel HEI distributer and super coil. ZR-1 roll pan, filled tailights. Blazer tank. Hidden hitch. 2 1/2" Flowmaster 40's. Parts bought but not installed>> ford 9" posi with disc. CCP front and rear lowering kit 4/5. Cab corners,foor boards,rockers, cab braces, Phatom grill, Painless wiring kit.

11-30-2010, 09:55 PM	#3
Hubscrub Cruzin Join Date: Dec 2009 Location: on the road Posts: 2,835	Re: Those with 700R4 please read. yes i drilled holes but i made me a crossmember i had a manual Attached Images __________________ 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

12-01-2010, 04:18 PM	#5
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: Those with 700R4 please read. I think nightmare has the best answer on the crossmember. Bolt it to the existing TH400 holes, which will put it about 4" too far to the rear. Then bolt or weld an extension on it to reach the 700R4 mount. This way you will have plenty of clearance if you ever need to pull the pan. Ray __________________ Live more responsibly. Eat lower on the food chain. Eat vegetarians.

12-01-2010, 05:53 PM	#6
Richard H. Spanked once Join Date: Oct 2006 Location: Intheshop, Indiana Posts: 969	Re: Those with 700R4 please read. This may help with the carb. http://purplesagetradingpost.com/sum...o/700R4p1.html hth. __________________ The ole 350 budget build.

12-01-2010, 06:02 PM	#7
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	Re: Those with 700R4 please read. I kept the original cross member and had to drill holes. I used a long, I mean long drill bit so I could go through the bottom hole and drill the top one. __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters

11-30-2010, 10:10 PM	#8
breezy Registered User Join Date: Oct 2010 Location: Palaskifield,Mo. Posts: 71	Re: Those with 700R4 please read. Thanks guys. Anybody else??

11-30-2010, 10:22 PM	#9
Strut Registered User Join Date: Oct 2009 Location: Corbin Ky Posts: 247	Re: Those with 700R4 please read. You'll need a TV Cable too.... I bought a conversion kit when I did mine. This is what I used: http://racetransmissions.com/store/p...1339cb856e4987 I also used a tubular cross member: I had to shorten my driveshaft too... __________________ 1972 Chevy C10 SWB 1999 GMC Sonoma Mini 2008 Yamaha R1 2007 Harley Nightster

11-30-2010, 10:24 PM	#10
classicchev Senior Member Join Date: Nov 2003 Location: Calgary Alberta Posts: 1,936	Re: Those with 700R4 please read. Im pretty sure I did not drill holes, but that was a long time ago. __________________ 67- 72 Parts collecter

11-30-2010, 11:27 PM	#11
breezy Registered User Join Date: Oct 2010 Location: Palaskifield,Mo. Posts: 71	Re: Those with 700R4 please read. Got the TV cable and dipstick, wired the brake light/low pressure switch. I need a tailshaft from a caprice I have been readig that it puts the mount in the same place as the 400, which is what I have now.

11-30-2010, 11:32 PM	#12
breezy Registered User Join Date: Oct 2010 Location: Palaskifield,Mo. Posts: 71	Re: Those with 700R4 please read. I just went and looked at my quadrajet and it has a extra mounting pi on the linkage. Would this work for the TV cable? Not sure if the geometry is corrct for the TV or it may have been for a 350 turbo tranny. Anybody else have 700 with qudrajet hooked to it?

12-01-2010, 09:37 PM	#13
breezy Registered User Join Date: Oct 2010 Location: Palaskifield,Mo. Posts: 71	Re: Those with 700R4 please read. Ok think I got it figured out. I done a little searching and figured out the new shaft I out in the carb has the correct linkage for a 700. Must have been from a early 80's car. So that's solved. Also found out a tail housing from a early 80's caprice has the mounting boss on it. Supposibly it is positioned at the same spot as the 400. We shall see come thurs. night or friday morning. Looks like it should be a fairly easy swap. If I remember I'll take the camara for pics.



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