Driveshaft spline separation
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Junior User
Joined: Aug 2001
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From: Clearwater, FL
Driveshaft spline separation
I’ll try posting this here as I did not get a response over at ‘Transmission, Differential, Axle and Transfer Case. Hopefully someone here can help me out…
I have a 79 Bronco front driveshaft that I am trying to separate at the splines (where it slips back and forth). I thought that the sleeve that the zerk is on was threaded, but it just spins around. There is a seal at the front of the sleeve; does this need to come off to slide the sleeve down? Nothing in Hayes or Chilton that covers this on a 4x4 shaft, just something about a boot with crimp bands.
I have lifted the Bronco 9" suspension and 3" body and now I think I am going to run into a problem with clearance at the crossmember. I converted the NP203 to a NP205, which pushed the transfer case toward the front of the truck about 5". This actually helped me as now the t/c is about 1/2" away from the maximum point forward it can go without hitting the crossmember. The old location would run the driveshaft line right into the crossmember. I was going to separate the driveshaft and take the stock axle (non cardan) side and put it on the t/c side to see if it will spin without hitting the crossmember. The cardan side will definitely not go on the t/c side without hitting. The driveshaft is now too long to hook up at the proper angle to check this out, that's why I need to separate the driveshaft. Is there a problem with running the cardan joint at the axle side instead of the t/c side? I think I will have to limit the travel with limiting straps just shy of the point where the driveshaft hits the crossmember. By the way, the front is a Dana 60 from a 79 F350.
I remember someone telling me that building a 1 ton Bronco with 44's and a 460 would not be easy..... Seems like the last 10% of the build takes 90% of the time!
I have a 79 Bronco front driveshaft that I am trying to separate at the splines (where it slips back and forth). I thought that the sleeve that the zerk is on was threaded, but it just spins around. There is a seal at the front of the sleeve; does this need to come off to slide the sleeve down? Nothing in Hayes or Chilton that covers this on a 4x4 shaft, just something about a boot with crimp bands.
I have lifted the Bronco 9" suspension and 3" body and now I think I am going to run into a problem with clearance at the crossmember. I converted the NP203 to a NP205, which pushed the transfer case toward the front of the truck about 5". This actually helped me as now the t/c is about 1/2" away from the maximum point forward it can go without hitting the crossmember. The old location would run the driveshaft line right into the crossmember. I was going to separate the driveshaft and take the stock axle (non cardan) side and put it on the t/c side to see if it will spin without hitting the crossmember. The cardan side will definitely not go on the t/c side without hitting. The driveshaft is now too long to hook up at the proper angle to check this out, that's why I need to separate the driveshaft. Is there a problem with running the cardan joint at the axle side instead of the t/c side? I think I will have to limit the travel with limiting straps just shy of the point where the driveshaft hits the crossmember. By the way, the front is a Dana 60 from a 79 F350.
I remember someone telling me that building a 1 ton Bronco with 44's and a 460 would not be easy..... Seems like the last 10% of the build takes 90% of the time!
Senior User
Joined: Aug 2000
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Driveshaft spline separation
The front driveshaft on my brother's F-150 1980 vintage just slipped apart. It was not necessary to remove the seal on the front of the female end. The fact that your sleeve just spins around sounds a little fishy. Just give it a good pull and it should come apart. I always mark mine to make sure the splines line back up.
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