The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board > The 1973 - 1991 Blazers, Jimmys, and Suburbans Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-14-2004, 09:15 PM   #1
firefighterpickett
Registered User
 
Join Date: Aug 2004
Location: colorado
Posts: 24
tranny swap questions

Has anyone switched a th-350 for a th-400? I just finished going from gas to diesel and now want to swap my tranny, I belive there is only a small size difference, so really only moving the crossmember and possibly new driveshaft
__________________
Remember the fallen. 9-11-01
76 K5 4X4 custom roll cage/soft-top, turbo 400 & np 208
http://www.youtube.com/sp2fraggle
http://www.oilfieldtrash.biz
firefighterpickett is offline   Reply With Quote
Old 10-14-2004, 10:37 PM   #2
454K5
Registered User
 
Join Date: Jan 2004
Location: Ft. Worth, TX
Posts: 19
they also use a different kickdown (detent). the th350 has a cable, the th400 has an electric solenoid. and the dipstick tubes are also different. other than that, it's a direct swap, other than...like you already said, move the crossmember, and modify the driveshaft.
454K5 is offline   Reply With Quote
Old 10-15-2004, 02:24 PM   #3
firefighterpickett
Registered User
 
Join Date: Aug 2004
Location: colorado
Posts: 24
great, thanx for the help, always nice to confirm what your thinking before tearing things up.
__________________
Remember the fallen. 9-11-01
76 K5 4X4 custom roll cage/soft-top, turbo 400 & np 208
http://www.youtube.com/sp2fraggle
http://www.oilfieldtrash.biz
firefighterpickett is offline   Reply With Quote
Old 10-15-2004, 06:39 PM   #4
1972C10
Account Suspended
 
1972C10's Avatar
 
Join Date: Dec 2003
Location: Texas
Posts: 2,686
The output shaft is larger on a TH-400 therefore you will need a new Yoke Shortened Driveshaft unless you have a 9" TH-350 And depening on what yoke you get you could need a 30 dollar conversion u joint Let me know what year and i can tell you what P/N If its pre 80 its a presicion 447
1972C10 is offline   Reply With Quote
Old 10-17-2004, 04:50 PM   #5
firefighterpickett
Registered User
 
Join Date: Aug 2004
Location: colorado
Posts: 24
it is a pre 80 so the pn would apply, thanx
__________________
Remember the fallen. 9-11-01
76 K5 4X4 custom roll cage/soft-top, turbo 400 & np 208
http://www.youtube.com/sp2fraggle
http://www.oilfieldtrash.biz
firefighterpickett is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:22 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com