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#1
04-18-2008, 08:10 AM
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Milage gains?
I have an 95 wrangler with the 4 cylinder, auto. At highway speeds it runs about 25-2800rpms. I was wondering is replacing siad tranny with a 5 speed manuel would be worth it and what RPM range would I be running at 60MPH. Would I have to change out the thrust bearing in the engine, due to the flywheel and all.
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#2
04-21-2008, 01:28 AM
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Re: Milage gains?
right now u have a TF904 (30RH) with the final gearing 1:1. if you change to a 5 speed, that would include an overdrive and reduce your rpms. if you ran an AX-5 (this is the stock 5 speed for the 4 banger), guessing that you have the stock tires and gearing, you would be reving 2300, roughly. if you ran an AX-15, (which was the 5 speed for the 6 cyl) you would be reving at 2100.
this is a good web site to help you with the gearing and rpms http://novak-adapt.com/knowledge/gearing.htm as for the thrust bearing, idk. i think as long as you get the right flexpate for the tranny, i think u should be alright. hope this helps.
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89' YJ / 95' YJ / 94' XJ 4.2 L I6 / 2.5 L I4 / 4.0 L I6 HO 5 Spd. AX 15 / 5 Spd. AX 5 / AW4 3 Spd. W/ OD 4" Rough Country / 4" Pro Comp Mickey Thompson 33/11.50/R16 BFG Mud Terrain 33/12.50/R15
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