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Do you have a floor shift 4 speed? If so the transmission probably has an unsynchronized "granny" first gear that is normally not used for driving. Granny gear is for running slow over rough terrain or for pulling stumps. You start the truck out from a stop in second gear.
First things first...you need to find a company that sells them, I think cab corners sell for like 19 bucks...
when you get it in, hold it beside the old corner to see how much you want to cut out..there easy to cut out, any cut off tool will get it right out..next put the new one in.. are you any good with a mig welder?...if you are line it up and tack it in, dont hold on one tack for too long or you will warp youe metal.. thats no good..hehe
After you get it tacked in.. Go all around it with tacks welds untill you get it all welded up..
Next, grind the tack welds smooth and use a fiberglass filler to smooth things up, sand, primer and paint...
That granny gear is unsynchronized so you can't downshift into it unless you double clutch which is pretty hard to do if you are slowing at the same time. In order to sync up you almost have to be stopped. I can do it because I spent many many hours operating a dual tranny setup where there was a 4 or 5 speed synchro tranny with a 4 speed unsynchronized box behind it that you were constantly shifting. Once you got the rhythm of it shifting was easy. I was driving a big redi-mix truck with a gasser 534 cube motor. It worked good out in the flat lands of central Kansas and I got 4 mpg out of those beasts. None of the other drivers got over 2 mpg which drove the boss and the mechanic nuts. The dispatcher would shift me around to other trucks as a vacation replacement and I still got 4 mpg no matter what truck I drove I carried just as many loads too. My reg truck only carried 7 yards state legal and some of the newer trucks would carry 8 yards. We didn't have the extra wheels they have on them now. As you might guess I liked driving them nuts...
From: In a town where there is never anything to do
cab corner time...
It has a flat bed so I dont know if that makes any difference..So just un-bolt the cab mount bushing the way it sits? Wont it need some support to get the bushing back in when the new mount is welded in place?
thats alright man.. yea you'll have to jack the cab up to fix that mount.. there is a crossmember that runs across the cab floor.. that would prolly hold the weight of the cab pretty good...mine was still in great shape, where are you from up north??...
yea my 79 f-250 , the cab mount holes, where the bushings go.. are like all rusted. i just found a peice of scrap metal and cut a new hole, then welded it on there
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