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hi, glad to find this forum. i just picked up an 87 250 extracab 4wd with a 7.3 IDI turbo swap (motor is from 93 i think) in overall rough but revivable condition, and been gettin down and dirty with it. What I've come here to see if I can find help with is on figuring out what driveshaft is in this thing, i'm having a hard time chasing down good leads towards answering my question. As far as I can tell the driveshaft mounts basically broke and the fix was to zip tie a big block of wood in there for it to sit on.
The truck has a C6 (also swapped in after the fact, as far as I understand). I'm wondering if anyone can tell me which driveline style/assembly/model this is, as I don't see it commonly when I look under other trucks, and if the space between the rear diff and the transfer case (80") can be replaced with another style.
Most notably, there isn't a center bearing, instead it's got some kind of intermediary case supported by 4 L brackets (see pictures). my 72 f250 and my f150 ranger both had what i'd think of as the standard shaft setup. I just don't really know what I'm looking at with this one and any leads on how this style is referred to would be immensely helpful.
I have no idea what that is. I've been under alot of F250's over the years, and I've *never* seen a carrier/center bearing setup with a crossmember like that. *ever*
Just for comparison, taking a quick look at rockauto, the Center bearing for an 87 F250 with the 6.9 looks like:
back in the good OLD days before married transfer cases, the overdrive units were not "married "either, but stand alone.
a perfect example: the 56 ford 2 dr wagon with 312 and McCullouch supercharger had a cable activated overdrive mounted about 8 inches behind the tailshaft of the 3 speed trans. it had a stub shaft with a universal, and coupler to bolt to the overdrive input.
hey thanks everyone for the replies, i really appreciate it. i called the shop whose sticker is on the driveshaft, and they didn't know what they were looking at either, but did suggest that it was possibly an overdrive. i'll say i'd love to have an OD cause the C6/7.3 combo winds up pretty fast, but i certainly don't have one that operates when i drive the car! i'll take another look at it with all this in mind though.
anyone have an idea of how something like this ended up in an 87 250? swapped in from something quite a bit older? i'm thinking what i'll do is just bring it back to a stock setup. it's all in all too damaged to try to restore. trying now to find all the right components, driveshafts aren't something i've done a whole lot of.
something else quite strange i found today-- so the speedo cable went into what we're now thinking is an overdrive unit, and when the thing turned out of it's mount it sheared the cable right off. i went to go look for the standard port that comes in on top of the TC output shaft, and it's got some kinda plug in it! (picture attached). it had the little bolt on retainer clip on there too. i'm wondering if i could get it out? must be some way. anybody seen this before? i'd kill to have a speedometer/odometer in the truck.
That would lead me to believe it is an overdrive unit, if they moved the speedo cable to it. Otherwise the speedometer would be inaccurate, when you engaged it.
I have no idea where it came from, or what it came out of, and obviously it can only be used in 2WD without breaking things. There has to be some kind of electric or cable arrangement to engage it.
