Author Topic: Just bought a 1974 c10... now I need a tranny.  (Read 259 times)

Offline DarthStig

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Just bought a 1974 c10... now I need a tranny.
« on: March 11, 2020, 07:16:43 AM »
Hi guys!

Im 100% new to this forum, and to restoring trucks so I need some help making sure all the research Ive done is correct. I bought a 1974 c10 WITH A DUMP BED from a guy and as I was driving it home, the tranny blew apart. No big deal since I bought the truck for less than $2500. Now Ive done my homework and Im sorry if this next part is a bit choppy but I want to make sure this is all correct:

It seems as if a 700r4 or a 4l60 should bolt up to it. The truck is a 350 engine and a th350 with a 9" tail. Assuming I dont get a 4l60e I can also bolt a non electronic one easily enough as well, correct? My driveshaft is 3 pieces (never seen that before) and if I read things correctly the 700r4 and 4l60 are 1/2" shorter. Do I need a new driveshaft to deal with that 1/2"? I know I need to move and drill new holes for the crossmember. Outside of that, it seems simple enough.

Online zieg85

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    • 73-87 GM squarebody extended cab and conversions up to 91 R/V series
Re: Just bought a 1974 c10... now I need a tranny.
« Reply #1 on: March 11, 2020, 08:28:29 AM »
I've done the swap and it worked out fine.  The TV cable needs to be adjusted correctly, other than that you've described how it is done.  I used my same driveshaft, right or wrong.  Welcome to the forum
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline bake315

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Re: Just bought a 1974 c10... now I need a tranny.
« Reply #2 on: March 11, 2020, 09:32:45 AM »
Welcome to the forum. I’m in the process of preparing a 700R4 myself to bolt up to a 350 in an ‘87.  If you go this route, try and find one made between 1988 and 1992 - they’d worked the majority of the “bugs” out of ‘em by then.  The earliest years are said to be not worth rebuilding.  Have fun!
• '73 Cheyenne Super C20 454/400 http://forum.73-87chevytrucks.com/smforum/index.php?topic=7672.0
• ’79 Scottsdale K10 350/NP208/SM465 “Oscar” http://forum.73-87chevytrucks.com/smforum/index.php?topic=37885.0
• ’87 Custom Deluxe R30 350/400 “Felix”

Offline VileZambonie

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Re: Just bought a 1974 c10... now I need a tranny.
« Reply #3 on: March 11, 2020, 03:52:37 PM »
TV cable and linkage/brackets
Lock up wiring
Driveshaft
Flexplate
Torque converter
Associated hardware
Dipstick/Tube
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