2002 Grand Cherokee 4.7 TCM Ordered!
Yes, I would recommend the 2002 jeep grand cherokee tcm. The wot shifts are at about 5400 vs the old 5200 ish, and the rpms are holding 1500 at like 60. The 2 to 3 mpgs I'm getting will hopefully pay for the 125 dollar part in no time. Like I said, the only downside is the 2nd O/D to 3rd shift for passing since the double second gear got replaced to accommodate the extra overdrive. And it does require a huge bit of throttle to hit the shift, and when it does it revs to 3k minimum. All in all it is a very good gaid with a little bit of sacrifice.
THE ULTI-MOD
Joined: Jan 2007
Posts: 19,797
Likes: 36
From: Union NJ
the 2nd prime (kickdown) is still there and is still used you just added a 2nd OD at .67:1
Engineers decided that instead of having six forward gears, it made sense to program the transmission to act as a five-speed with an alternate second gear for downshifts. So, for instance, cruising a healthy highway speed of 70 miles per hour (110 km/h) on a 545RFE would yield a 2000 RPM, about 200 RPM less than the 45RFE programming, which means less fuel consumption.
Professional
Joined: Aug 2011
Posts: 144
Likes: 1
the more I read about this the more I wish I had the $$$ around to get a durango that has the 5speed already or at least is capable of running the 5speed TCM without issues. durango's 2001-2003 dont seem very common around here and those I do find are stupid pricey, even comparing a 2000 to a 2001 the price increase is drastic
Last edited by Blind Monkey; Aug 20, 2011 at 07:47 PM.
the more I read about this the more I wish I had the $$$ around to get a durango that has the 5speed already or at least is capable of running the 5speed TCM without issues. durango's 2001-2003 dont seem very common around here and those I do find are stupid pricey, even comparing a 2000 to a 2001 the price increase is drastic
Professional
Joined: Aug 2011
Posts: 144
Likes: 1
I dont want a new one or a newer one. just want a first gen with the 4.7.
Record Breaker
Joined: Jun 2011
Posts: 2,387
Likes: 41
From: Bismarck, ND
No the 5.9l doesn't even come close for fuel economy, I was very happy when I average 15 highway mpg. Used to get 16 but then I went to a LT tire instead of the Passenger rated one that was on it cause that P rated was so easy to overload.
Record Breaker
Joined: Jun 2011
Posts: 2,387
Likes: 41
From: Bismarck, ND
what is you city milage, mine is like 9-10, I have an uncle who usually get 18-20 highway and 15-16 city. His is a 02 slt 4.7l, 4wd, and he has bad alignment with the original tires (85k now). Maybe you need some O2 sensors?