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  •  » Transmission yoke length

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    2/16/2021 3:06 PM  #1

    kardad
    I FYI 24-7

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    From: Lexington Ky
    Registered: 12/03/2019
    Posts: 305

    Transmission yoke length

    I'm curious, as we talk often about drive line vibrations and I presently have my trans (T-5) out. I have slid several old yokes I have laying around in and have defiantly notices a difference in play/slop. I believe the one I am using at this time was the one from the donor car that I got the T-5 from. My question is length, the ones I have all are around 5" or so. I know I had one on my 66 that was much longer, but the splines on the inside didn't go all the way to the end. If I remember correctly the splines stopped about 2" from the end of the slip yoke.

    That car never had any vibration with the T-5. I'm wondering if it had more surface area in contact with the trans rear tail housing bushing. Or maybe I just have a bunch of worn out yokes. I guess I can look up the spec and start measuring mine.
     

     

    2/16/2021 5:12 PM  #2

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,499

    Re: Transmission yoke length

    The tailshaft bushing can wear, as can the yokes.  I always replace the bushing on a rebuild, and then check to see if a new yoke fits.  I had some years ago that were tight and I ended up having to hone the bushings to get a proper slip fit. 

     

    2/16/2021 6:55 PM  #3

    kardad
    I FYI 24-7

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    From: Lexington Ky
    Registered: 12/03/2019
    Posts: 305

    Re: Transmission yoke length

    Looking around online and I noticed that 200-2011 and maybe more Ford Ranger and Explorer use a balancer on the 5-speed slip yoke.

    I have also learned that the majority of the slip yokes for Ford are 5.25” long (the actual slip shaft) and the one I am using is only 4”.

    I am definitely going to put a new bushing in while it’s out and will get a new slip yoke but now I’ve wondering which yoke.

       •Thread Starter
     

    2/16/2021 8:16 PM  #4

    Texas!
    FYI Addict

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    Registered: 6/27/2014
    Posts: 232

    Re: Transmission yoke length

    I read somewhere that you must use the short slip yoke with a T5- the one where the splines come all the way to the end. The long yoke- the one where the splines begin about an inch or two down from the end will fit inside the T5 but it blocks some kind of oil passage and leads to an early failure.

     

    2/17/2021 6:46 AM  #5

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,499

    Re: Transmission yoke length

    I wouldn't worry about the yokes with the balancer.  Things like that were done to damp vibrations out of specific chassis.  They are tuned to that chassis and won't do the same thing in your application.

    As far as the longer yoke blocking an oil passage in the T5 I don't think so.  The only oil passage in the T5 tailshaft housing feeds to yoke bushing, and the way that's fed couldn't be blocked by the yoke.  That doesn't mean there's no merit to the 4" vs. 5" story though.  Most of these tales have at least a grain of truth in them.  I have a T5 apart on my bench right now.  I'll look at it and see if there's any reason why a 5" yoke would be a bad idea. 

    That said, every T5 yoke I've ever seen had the splines all the way to the end.  I wouldn't deviate from that style. 

     

     

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