Can you put a 42RLE Auto Transmission 4spd in a 2000 TJ. Need the 4th gear for the highway. 35" tires and 4.88's @ 60mph = 3000rpm's.
Well, like you, I have no experience with this swap so I searched the internets and found a lot of useful information.
The answer to your question is yes you can (
because anything is possible with unlimited money and time).
The best answer I read was this; "
Trying to get the 100% computer controlled 42RLE 4-speed automatic working in a 2002 or older TJ would be like trying to get Android working on a dial-up telephone."
Most of the answers on the other Wrangler forums were always return questions
"why do you want to ?" Most people said because of the high rpm's like you did
.
I think the bottom line is, on older TJ's, you have to live with it or re-gear.
Disclaimer; I only repeat what I read most of the time.
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