Early 1993 Grand Cherokees had the AW4. Late 1993-on had the 42RE. I have no complaints about that trans so long as idiot dealer service departments haven't screwed it up. They would often misadjust the TV cable or bands and ruin the unit or run Dexron in it thinking it was an AW4 even though is uses ATF+.
1st gear is actually 2.74, which is lower than 1st on the THM400 and TF727 of 2.45, and overdrive is .69.
My 4.0L ZJ has less than 1000 miles on it. Just for meandering around town it has the gearing to pull off the line quickly, but it's not the instant head-snapping torque a V8 gives. On the highway it feels powerful because the pedal doesn't have to be pushed down very far to cruise, but come to a hill or go to pass someone and your foot sinks quickly.
The power in a 4.0L doesn't kick in until 3000 RPM and pulls hardest at 3500, so you have to ring down to the engine room for another gear and rev the piss out of it before you do anything antsy. Do that, and the power is decent, but the sound of an I6 at 4000 RPM fighting against 4500 pounds of Jeep is not a reassuring thing. You can tell it is working hard and doesn't like it.
Perhaps I'm spoiled by learning to drive in a 360 Wagoneer, a 327 Rambler, and a 5.9 Dodge truck. I'm used to just shoving my foot down and as long as the engine is between 1500 and 4000 RPM, I'll rocket forward with no complaints from the engine. It seems to like it, actually...
I've noticed on every EFI car I've driven that pushing the throttle past 1/2 when already in the engine's peak power band doesn't do much more good compared to the same operation a 2bbl or 4bbl carbureted engine. On them, the power doesn't even kick in until 1/2 throttle.
'72 Jeep Wagoneer Custom, 360 V8
'84 AMC Eagle Limited, 258 I6
Last edited by FSJunkie : 07-16-2013 at 09:58 PM.