Transmission wont engage until engine is warmed up -
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post #1 of 2 Old 12-28-2012, 03:36 PM Thread Starter
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1989 YJ Wrangler 
Join Date: May 2010
Location: Jacksonville, NC
Posts: 1
Transmission wont engage until engine is warmed up

Recently I've noticed my transmission will not engage on my 89 YJ until the engine has warmed up to normal operating temperature at idle, any advice would be much appreciated...?
89 YJ 4.0 I6
TH350 automatic transmission

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post #2 of 2 Old 12-28-2012, 04:20 PM
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1971 CJ5 
Join Date: Jan 2002
Location: Eagle Point
Posts: 7,472
Knee jerk guess would be the o rings in the valve body. If they have gotten old and shrunk, the valves won't engage till they warm up (expand). I had this problem with a 67 Cougar.
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