need help with th700r to th400 swap ! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

luv bucket · 04-12-2010, 06:37 PM

ok i have a 91 suburban 1/2 ton 4x4 my friend blew the th700r up and handed me a th400 hd with case, torque converter and drive lines from a 88 burban with 3/4 axles and told me it will be a stronger tranny problem is my 91 has electric speedo and cable kick down. the th400 has cable speedo and what i think is a vac kick down. has any one done this swap that can help tell me what else i might need to make every thing work again.

Chevy1TonFun · 04-12-2010, 10:24 PM

The Turbo 400 has an electric kick down. You can buy a B&M kick down kit from Summit. I think it was 30 bucks. I sure that a 91 Sub as vacuum lines so hook up the line to one of the vacs. As for the electric speedo, check out this site.
http://www.jagsthatrun.com/Pages/Spe...eedometer.html

luv bucket · 04-12-2010, 11:41 PM

thanks ridin high sorry if i was not clear about my problem my friends called and gave me a hand right after i wrote the post and we think it has a vacuum kick down every thing work except the speedometer since the truck has electronic and the new tranny has cable. witch i would like to work to keep ticket to a minimal.

04-12-2010, 06:37 PM	#1
luv bucket Registered User Join Date: Apr 2010 Location: vancouver wa Posts: 2	need help with th700r to th400 swap ! ok i have a 91 suburban 1/2 ton 4x4 my friend blew the th700r up and handed me a th400 hd with case, torque converter and drive lines from a 88 burban with 3/4 axles and told me it will be a stronger tranny problem is my 91 has electric speedo and cable kick down. the th400 has cable speedo and what i think is a vac kick down. has any one done this swap that can help tell me what else i might need to make every thing work again.

04-12-2010, 10:24 PM	#2
Chevy1TonFun Grease Monkey Join Date: Oct 2007 Location: Fresno CA Posts: 750	Re: need help with th700r to th400 swap ! The Turbo 400 has an electric kick down. You can buy a B&M kick down kit from Summit. I think it was 30 bucks. I sure that a 91 Sub as vacuum lines so hook up the line to one of the vacs. As for the electric speedo, check out this site. http://www.jagsthatrun.com/Pages/Spe...eedometer.html __________________ Tow Rig: 2012 Chevy 2500HD CCSB LTZ Z71 4x4 Duramax Ultimate Offroad Build: 1978 Chevy Silverado K30 Crewcab Build Link http://67-72chevytrucks.com/vboard/s...d.php?t=654053 Mud Truck: 1972 Chevy Cheyenne K30 4x4, 468/400/205, D60/D70HD, 18" Custom Lift, 17x39" IROKs FOR SALE http://67-72chevytrucks.com/vboard/c...ton-4x4&cat=12

04-12-2010, 11:41 PM	#3
luv bucket Registered User Join Date: Apr 2010 Location: vancouver wa Posts: 2	Re: need help with th700r to th400 swap ! thanks ridin high sorry if i was not clear about my problem my friends called and gave me a hand right after i wrote the post and we think it has a vacuum kick down every thing work except the speedometer since the truck has electronic and the new tranny has cable. witch i would like to work to keep ticket to a minimal.



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