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Old 04-22-2013, 06:07 AM   #1
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Join Date: Mar 2010
Location: South Carolina
Posts: 392
YJ TF999 transmission swap

I have a 1987 YJ with the 4.2 engine, Chrysler TF A999 transmission, and an NP207 transfer case. What transmission can I swap in the TF A999's place? I would like to keep the 207 transfer case. Maybe even go with a manual transmission.
My problem is that I've had a pan leak for quite a while, and I can't get it to stop. I've changed out the gasket several times, bought a new pan, had a friend of mine rebuild it, and added a transmission cooler. Idling its fine, but when I drive it for a few miles it blows fluid from the pan. Not a small leak either, it pours. Transmission performs great, just leaks. It all started when my torque converter broke off the pump drive tabs. When I had it out to replace the T/C I welded up the vent in the pump and moved the vent over the forward band in the transmission. Its like its building too much pressure.
Its a really great transmission and I'd like to keep it, but I can't handle the leaking anymore and can't find another 999 that I can afford.

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87 YJ 4.2 Automatic
8.5" lift 35x12.50 Baja Claws
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