YJ drivetrain swap - JeepForum.com
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post #1 of 6 Old 02-11-2013, 08:26 PM Thread Starter
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1993 YJ Wrangler 
Join Date: Oct 2012
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YJ drivetrain swap

Heres what im thinking. Sbc with T18 tranny 205 transfer case dana44 hp and 9 inch from f150 with 3.50 gears with 33s. Anyone doing or has done this? What would the highway speeds be like. Dont need much maybe 55mph

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post #2 of 6 Old 02-11-2013, 08:32 PM
Joe Dillard
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1991 YJ Wrangler 
Join Date: May 2004
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You may want to checkout some gear ratio calculators. They will give you a good idea as to the final gear ratio according to tranny, tcase and axle ratio.

This one won't help you much - but gives you an idea what I'm talking about.

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post #3 of 6 Old 02-11-2013, 08:37 PM
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why a 4 speed?
205? why not a d300?

'89 YJ, 4.2L, ax-15, B&M shifter, 1" BL, TJ flares, '99 intake, '91 EFI, 5.0L explorer injectors, GenRight tank & stretch, 35" ProComp Xtreme muds, 52" chevy springs rear, 44044 Ranchos front.....
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post #4 of 6 Old 02-11-2013, 08:53 PM Thread Starter
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I have the 4 speed and transfer case. Running a 4 cylinder with ax15. Dont want to buy the adapter to the small block
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post #5 of 6 Old 02-11-2013, 10:58 PM
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I take it you have done your rresearch on input shafts for the t18?
I do have to ask about the transfer case choice though? trade it for a dana 20 or 300. Save space and weight.

Im in the process of building my t18 and dana 20 to bolt up to my 4.0
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post #6 of 6 Old 02-12-2013, 02:00 AM Thread Starter
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1993 YJ Wrangler 
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My initial post was wrong. The tranny is a NP439. The 205 is bolted up to the 439. Im going to run it behind a small block 350. I have a lot of hills on the highway and im looking to make a hill climber for hunting and pulling my boat and back and forth to work.
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