C4 on a flathead
Cargo Master
Joined: Jun 2001
Posts: 2,571
Likes: 22
From: Oxford, Indiana
The C4 is a good little transmission and can be inexpensively built to be be nearly bullet proof. As long as it is in good shape to begin with, I see no reason at all that the transmission wouldn't be capable of pulling a car on a tow dolly. It was, after all, original equipment in some light pickup trucks. I honestly think that your limiting factors will be the flathead and the rear gears. If you stick with the stock rear axle and gears, it will pull anything you want but not very fast. If you go to a more highway-friendly ratio, you top speed will increase, but a 100 HP engine is going to start having a tough time pulling much weight at speed.
Fleet Owner
Joined: Jul 2004
Posts: 27,299
Likes: 1,059
From: NM
Personal opinion, my experience with "average" C-4's (not pro-built for drag racing) behind V8's has not been great. For the same amount of trouble you could put an AOD behind it, have OD and better durability IMO. If you do get a C-4, get EVERYTHING that connects to it -- flex plate, block plate, t.c., etc. There were thousands of variations and piecing a set together is a nightmare.
Post Fiend
Joined: Mar 2007
Posts: 5,776
Likes: 2
From: springfield il
the automatic route crossed my mind many times now for my flatty . i won't though as losing that long stick 'tween the doors in the floor will eliminate some of the ol' girls " character " . it can be done , isn't cheap , but ...................... i'm putting an 8.8 in the back of my effie , thought it was a 2.73 , but it's a 3.08 for driveability on the open range as it were . running a t-98 four gear with a 6.62:1 first gear so she'll still pull easily enough . blue oval is right with my oe gears , 3.92 , my lil' flatty has pulled as much or more than any dain late model i have had . i just kinda like the idea of driving down the road without her screamin' her a-- off and watching the speedo hover at 45-50 and the fuel gauge drop to the floor so quickly .
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