u joints
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Joined: Jan 2001
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u joints
I changed my tranny to a t18 from the 3 speed/od.had to change driveshaft but the u joints are not the same size. large on chunk small on driveshaft.Bought a special u joint/odd very odd.Is there a yolk for the chunk that will match the shaft (SMALLER} 331 GEARS
Fleet Mechanic
Joined: Nov 1999
Posts: 1,415
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From: Lower 48
u joints
>I changed my tranny to a
>t18 from the 3 speed/od.had
>to change driveshaft but the
>u joints are not the
>same size. large on chunk
>small on driveshaft.Bought a special
>u joint/odd very odd.Is there
>a yolk for the chunk
>that will match the shaft
>(SMALLER} 331 GEARS
When you say "chunk" are you talking about the trans? If so you should be able to swap out tail shaft yoke and use the one from the 3 speed. I had to do that on a similar tranny swap. It was a bolt in.
Trail Rider
>t18 from the 3 speed/od.had
>to change driveshaft but the
>u joints are not the
>same size. large on chunk
>small on driveshaft.Bought a special
>u joint/odd very odd.Is there
>a yolk for the chunk
>that will match the shaft
>(SMALLER} 331 GEARS
When you say "chunk" are you talking about the trans? If so you should be able to swap out tail shaft yoke and use the one from the 3 speed. I had to do that on a similar tranny swap. It was a bolt in.
Trail Rider
Posting Guru
Joined: Apr 2000
Posts: 1,069
Likes: 1
u joints
check with junkyards or consult a hollander interchange book to find out what tranny might have same size u-joint . you might be able to get a parts guy to figure it out using the u-joint parts book. i know on the f150 you can have 1-1/16 or 1-1/8 u joint cups, so it should be easy to find out what will work.
ultimately, you may have to have yoke welded on your driveshaft.
ultimately, you may have to have yoke welded on your driveshaft.
Posting Guru
Joined: Jun 1999
Posts: 1,525
Likes: 1
u joints
Without knowing the exact year model of your truck, or, what truck the driveshaft came from, I would say you need a part # 5-1204X Spicer joint in the rear and a 5-213X / 5-1203x JOINT the front. Identifying U-joints and where they can be used is kinda my specialty (17 years in parts w/ driveline building experience)so if you have trouble, feel free to contact me.
Phil
Phil
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u joints
I am going to try the salvage yards to try to get this corrected before I do any thing else.The truck is running ,but I dont like anything thats not correctly repaired.Thanks to all for the help.Phil if I cannot get this corrected I will contact you later.Thanks again guys!.
