The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)
-   The 1973 - 1991 Blazers, Jimmys, and Suburbans Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=37)
-   -   tranny swap questions (https://67-72chevytrucks.com/vboard/showthread.php?t=123605)

firefighterpickett 10-14-2004 09:15 PM

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 :confused:

454K5 10-14-2004 10:37 PM

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.

firefighterpickett 10-15-2004 02:24 PM

great, thanx for the help, always nice to confirm what your thinking before tearing things up.

1972C10 10-15-2004 06:39 PM

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

firefighterpickett 10-17-2004 04:50 PM

it is a pre 80 so the pn would apply, thanx


All times are GMT -4. The time now is 03:49 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright 1997-2025 67-72chevytrucks.com