42re shift kits - JeepForum.com

 
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post #1 of 3 Old 02-20-2015, 09:18 PM Thread Starter
Jarodjeep
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2003 WJ 
 
Join Date: Jul 2014
Location: paris
Posts: 25
42re shift kits

Hey guys,
Ok i got a 03 grand Cherokee, 4.0 w/ 42re 2wd and im droping trans real soon to overhaul it.. I got majority of stuff pilled up to do it.. But I've been thinking about ordering a shift kit to put in it. I've noticed the cheaper.. Oh i cant remember the brand but jr kit, superior shift kit, and the more expensive 100$ transgo kit has 3 different lvls of shift mods to choose from correct? all mod to allow constant flow of trans fluid which is great on extending my rebuilds life and they change your shift patterns at certain rpms.. But I CANT find any specs or charts on the benefits of installing.. Basically, to be more specific I mean will these kits improve fuel economy if so which kit would someone with knowledge of each kit install to get the best performance and fuel mpg. Or am i better off with sticking to stock shifting although id still like to have the constant trans fluid flow if just stock shifting is better on mpg.. I mean im just unsure of these questions and any help would be cool, so maybe influence me to purchase one thanks.

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post #2 of 3 Old 02-21-2015, 10:30 PM
MuddyWJ
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Join Date: Feb 2012
Location: San Rafael
Posts: 3,285
Transgo shift kit is the only one I would use and have. It won't help with MPG or Any of that bull****. It will definitely lengthen the life of your trans and smooth the shifting. Any trans guy will tell you, you're already spending the money Why not make it last.
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post #3 of 3 Old 03-18-2015, 11:54 AM Thread Starter
Jarodjeep
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Join Date: Jul 2014
Location: paris
Posts: 25
Mpg matters to me and isnt bull*** when your driving 80+ miles daily. I already know and understand it will lengthen the life of my build id just like to know if the shift patterns that the kit produces will affect mpg drastically in a negative way or beneficially even if slightly and a source to back it would be nice.

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