Need help finding a conversion u joint


Clay46

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So I got into a situation where I need to build my parts truck into my daily and one part I need is to figure out the driveshaft, I pulled engine and trans from a single cab 87 and put it into the extended cab parts truck which is also an 87. I found a usable driveshaft in a junkyard but it didnt have the end that goes into the trans. So what I have found is that the single carbs and extended cabs use different size u joints. Both 2wd if it matters. I have looked all through the junkyard for the end that goes into the trans from an extended cab but all the manual extended cabs dont have driveshafts. So my last resort here is trying to find a conversion u joint which seems pretty stuff to find. I have found that the single cab uses a spicer 1310 and the extended cab uses a 1210 but cant find the u joint, any help at solving this issue would be appreciated, I've been searching for weeks
 


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Clay46

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I forgot to mention it's an fm132 trans and the old driveshaft has the flange for an a4ld trans. Didnt know if maybe I could do anything with the flange already on it or not but I think they are different
 

sgtsandman

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Is it fixed in the transmission? If not, maybe you can pull it and take them to a drive shaft place to make one or modify one of the ends for a standard one.
 

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Do you still have the old drive shaft? Maybe they can take the end off the old one and out it on the new one?
 

Clay46

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Do you still have the old drive shaft? Maybe they can take the end off the old one and out it on the new one?
I would if it was that easy. I dont have the end for a manual that fits onto the extended cab driveshaft. I just have the one from my old single cab which uses a larger u joint
 

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If all else fails call these people. They can make or modify anything. I've bought several custom oddball shafts from them over the years and they do great work. They may be able to just help you find the proper joint.

 

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You won't find a 1210->1310 conversion joint, they don't exist.

Both transmissions have a slip yoke at the back of the transmission, I believe? Maybe look through newer trucks and see if you can find a slip yoke, then have a driveshaft built for the length you need. Driveshafts are really hard to find in some cases because of all the length variations in those years and sometimes it is just impossible to find a used one. I had to buy a new one from O'Reilly for my '88 4x4 short box truck and then have it shortened because the only one they could order was too long.
 

Clay46

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You won't find a 1210->1310 conversion joint, they don't exist.

Both transmissions have a slip yoke at the back of the transmission, I believe? Maybe look through newer trucks and see if you can find a slip yoke, then have a driveshaft built for the length you need. Driveshafts are really hard to find in some cases because of all the length variations in those years and sometimes it is just impossible to find a used one. I had to buy a new one from O'Reilly for my '88 4x4 short box truck and then have it shortened because the only one they could order was too long.
Yes it is a slip yoke that it uses. I have a driveshaft it's just missing the slip yoke that I need.i might try searching online more for the slip yoke and might head to a junk yard this weekend to hopefully find one. If I remember correctly the slip yoke for the manual is missing a tooth where as the automating slip yoke is not.
 
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Shran

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I'm not real familiar with 2wd trucks, you may be right about the slip yoke being keyed. I have only owned a couple 2wd first gens and they were just junkers that I stripped. I am fairly sure I still have a driveshaft from one of them... it was an '87 or '88 long box single cab, think it had a manual. If you can't find what you need locally, I can dig it out and send you some pics.
 

Dirtman

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So friggin big!
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The slip yoke on my 09 is keyed.
 


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