DIY Transmission Jack -
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post #1 of 3 Old 02-22-2013, 07:32 PM Thread Starter
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1998 TJ Wrangler 
Join Date: Aug 2011
Location: Clovis
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DIY Transmission Jack

What do you think of this design for converting a floor jack (pictured below) to a transmission jack? I'm planning to begin building this tomorrow, so any comments/suggestions on how to improve the design would be greatly appreciated. Note: Diagram is not to any scale.

The idea is to remove the cup on the jack and replace it with the above bolt-on adapter. The body of the adapter will consist of a wide piece of steel channel (1/8"?). The purpose of the adj. bolts and the free-floating stage is to allow for fine-tuning of the position of the transmission (with coarse adjustment of the transmission position being accomplished by placing blocks/wedges under the transmission).

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Last edited by Line58; 02-22-2013 at 07:38 PM. Reason: Add explanation of diagram.
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post #2 of 3 Old 03-01-2013, 08:22 AM
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sure it can be done simple enough and it does work pretty well. I've made one out of screwing sheetmetal and 2x4s into a bastard child offspring that I've used 4 seperate times.

Or you can go the route and just buy one.

google images for "floor jack transmission adapter" there are lots of style right at the top.
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post #3 of 3 Old 03-01-2013, 08:25 AM
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looking at the diagrams that just popped up, one thing I'll urge you to keep inmind is if you (most likely) are leaving the tcase attached, it really throws off the center of balance. it can be managed by angling the jack to the drivetrain but then that defeats the purpose of being able to slide the assembly out of the flywheel. If you're making your own, I'd recomend to have an offset attachment point, and a safety chain to keep it from wanting to rotate along the ds axis in the adapter.
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