Transmission Problems
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Senior User
Joined: Mar 2001
Posts: 312
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From: Silver Lake U.S.
Transmission Problems
I gots a problem. I have a 4x4 and was about to put in my auto tranny when the guy told me that it won't work and this is why. The auto trannys don't have a u joint hookup on the back like the 3 speeds which hooks to the mini driveshaft to the x-case. The autos have a type of threaded shaft he said. So now i'm stuck. Is this true? (i haven't looked at 'em yet) I really wanted an auto and not a manual for hauling my boat on ramps and such so any ideas would help. thanks
Postmaster
Joined: Dec 1999
Posts: 2,813
Likes: 6
From: Connecticut
Transmission Problems
The automatics use a splined type yoke on the driveshaft, that slides on the tailshaft. What you need to do is to get a yoke that will fit your automatic and then get someone who is knowledgeable in a good auto parts store to match a u-joint that will fit the yoke and your old driveshaft. it may take some doing, but it's not impossible. Is your mini shaft long enough to reach the back end of your automatic when it's installed? If not, you will have to get a custom driveshaft made up.
Barry
Barry
Senior User
Joined: Jul 2003
Posts: 255
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From: Dallas/Fort Worth
Transmission Problems
There are two basic types of transfer cases; divorced and married (who makes up these terms? 
) The one in your truck now is the 'divorced' type, as it is separate from the transmission (the married types bolt directly to the transfer case). Most newer trucks will have married cases... although yours has the advantage of placing the yoke for the front driveshaft farther back, so the driveshaft angles aren't as extreme.
The tailshaft on trannys for divorced transfer cases are usually VERY short (auto or manual) - you will probably have to find a short one (either the whole tranny, or the tailshaft and housing from a tranny like the one you have) to get it to fit between your motor and transfer case. Then you will have to to come up with the yoke and U-joint as Barry suggests. The other option you have is to get a tranny with a married transfer case and re-do all the mounts and driveshafts... good luck whichever way you decide to go!
) The one in your truck now is the 'divorced' type, as it is separate from the transmission (the married types bolt directly to the transfer case). Most newer trucks will have married cases... although yours has the advantage of placing the yoke for the front driveshaft farther back, so the driveshaft angles aren't as extreme. The tailshaft on trannys for divorced transfer cases are usually VERY short (auto or manual) - you will probably have to find a short one (either the whole tranny, or the tailshaft and housing from a tranny like the one you have) to get it to fit between your motor and transfer case. Then you will have to to come up with the yoke and U-joint as Barry suggests. The other option you have is to get a tranny with a married transfer case and re-do all the mounts and driveshafts... good luck whichever way you decide to go!
Thread Starter
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Senior User
Joined: Mar 2001
Posts: 312
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From: Silver Lake U.S.
Transmission Problems
Thanks for the replies. I'm not going to put a married t case on b/c i'm running out of money. haha. However I may look into getting a special driveshaft section. Or, I"ll just go to a 4 speed manual I suppose. Thanks again!
