Vacuum T-Case to Manual Shift - Interested in a kit?

Discussion in '70-Series Tech' started by cruiseroutfit, Jun 12, 2018.

  1. cruiseroutfit

    cruiseroutfit Supporting Vendor Moderator

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    Curious how many of you have gone down the road of converting a vacuum 2WD-4WD t-case to manual shift, either in an original vacuum shift vehicle OR using a t-case from a vacuum shift in a manual setup. We have some neat new t-case/tc parts offerings in the works and want to know if there is value in us selling/shipping a pre-made kit for doing the conversion. It won't however come with the linkage outside of the t-case, just the t-case components. Thoughts?

    Conversion parts for reference

    IMG_0012.JPG
     
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  2. beno

    beno Gihee Arakawa Moderator GOLD Star

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    Do the vacuum diaphragms ever go bad?

    I know folks like doing this conversion, but I have never seen the value of it since the diaphragms are readily available and they never seem to go bad.

    The vacuum solenoid can be sourced using old pick up 12V iterations so the work around for that is still good too if they do go bad.

    My. 02
     
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  3. cruiseroutfit

    cruiseroutfit Supporting Vendor Moderator

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    I certainly don't disagree, I have several vacuum operated Land Cruisers and they work just fine. I think for many (most) the utility is in the ability to buy a later model t-case that has vacuum and convert it for manual use in an FJ40, etc.

    Ironically we started this project working on a manual to vacuum conversion setup and thus we'll have quite a few manual split t-case parts to build kits with :D
     
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  4. cruiserdan

    cruiserdan SupportingVendor Emeritus Moderator

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    I, for one, am not a fan of vacuum-operated anything. I would certainly entertain some sort of complete kit to convert my BJ74 to a mechanical shift.
     
  5. SteveJackson

    SteveJackson Supporting Vendor

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    This is pretty much exactly what I say when a customer asks me about the vac shift cases.

    That said, choice is awesome! I'd definitely stock a couple of these to offer as an add-on. Make the kit!
     
  6. roscoFJ73

    roscoFJ73

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    Not that I know of. I think they are a good reliable system. Sometimes they get a leak in the hoses or occasionally a solenoid burns out, but you just swap hoses with the good side to get home.
    The other thing I like about the vacuum shift is you can change into 4wd at a higher speed.
    But some just like a purely mechanical shift.
     
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  7. Cruiserdrew

    Cruiserdrew On the way there SILVER Star

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    Would be an awesome option. Something about a lever that's just better.
     
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  8. PATHnz

    PATHnz

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    What would a kit cost?
     
  9. cruiseroutfit

    cruiseroutfit Supporting Vendor Moderator

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    So dollar wise it would be roughly $150. Is that still appetizing? That would include everything shown in pic #1, all Genuine Toyota and or OE (NOK Seal for example). And the 15x1.5mm tap that is needed to put the detent setup in. We could offer those too? Then again Amazon is easy :D
     
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  10. GooSe77

    GooSe77

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    So how long does it ake to convert from vacuum to manual ? Do I need to tear off my transfercase ?
     
  11. cruiserdan

    cruiserdan SupportingVendor Emeritus Moderator

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    Kurt I assume the shift pattern would then become the "L" with low4 back and to the right? As you know with RHD the transfer lever is quite close to the driver's left leg. We do not have an early RHD 7x in the museum with a manual-shift transfer. Do you know if the new pattern would move the lever further to the right? That may create an uncomfortable driving position in low range.
     
  12. cruiseroutfit

    cruiseroutfit Supporting Vendor Moderator

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    I've never done them ON the vehicle but no reason it can't be done. The case does need to be split in order to install the shift mechanism so plan accordingly with seals, gaskets and/or the appropriate rebuild kit (yeah, we stock that :D)
     
  13. cruiseroutfit

    cruiseroutfit Supporting Vendor Moderator

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    That is a great question on a RHD 7x. I'll have to look into that. My 74 is vacuum 4WD so it may get converted along with an H55F (did I mention those to you the other day?)
     
  14. joekatana

    joekatana SILVER Star

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    Almost all the 1HZ H55 combos I bring have a vacuum shift case and it seems that 90 % of my customers would prefer full mecanical shift, pretty sure there is a market for this.

    I prefer the vacuum because it is easier and faster to push the button then shift the lever.
     
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  15. cruiseroutfit

    cruiseroutfit Supporting Vendor Moderator

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    Your on my list to email in the next day or two. I have something along these lines I think you may have a great market for!
     
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  16. cruiserdan

    cruiserdan SupportingVendor Emeritus Moderator

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    No you did not mention that. Nor did you drop off the promised business cards....:doh:

    Of couse I forgot to ask you if you remembered them before you departed.:)
     
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  17. cruiseroutfit

    cruiseroutfit Supporting Vendor Moderator

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    Ah dang. I had a small stack. I'll resolve that :D
     
  18. nickolai

    nickolai

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    Great idea. Ideal application is into 40 series chassis as the vacuum UFO is too wide and you need to notch the frame, of be cool with mininal clearance. Plus its fewer switches etc to buy.

    I did it in my old 1hz h55f 40, very easy, and even easier if you're all the way in there doing bearings and seals. Just remember to put the shift lever in before you button it all up - ask me how i know.

    What about a kit that includes the conversion bits, the tap and a twin stick kit? or are twin sticks not cool anymore?
     
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  19. cruiseroutfit

    cruiseroutfit Supporting Vendor Moderator

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    That is certainly an option. I've not sold one of the AA Twin-Stick kits in ages and it does require use of a different shift shaft (which means the kit price comes way down too. Great input!
     
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