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Old 06-17-2013, 04:16 PM   #1
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Need some power

What can i do to my 99 4.0 to get more power out of it? I can put it to the floor and theres just no response. The thing has no balls what so ever. Any ideas?
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Old 06-17-2013, 04:25 PM   #2
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Regearing is the best thing you can do

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Old 06-17-2013, 04:53 PM   #3
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Quote:
Originally Posted by Skurvydog22 View Post
Regearing is the best thing you can do
this
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Old 06-17-2013, 05:06 PM   #4
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Give us some more details on your rig and we'll give you some pointers. Include: tire size, tranny, current gear ratio.
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Old 06-17-2013, 05:47 PM   #5
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Quote:
Originally Posted by Billdog169 View Post
What can i do to my 99 4.0 to get more power out of it?

Nothing that is cost effective.
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Old 06-17-2013, 05:52 PM   #6
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A good tune up can do wonders.. Plugs, wires, distributer/coil pack, oil & filter
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Old 06-17-2013, 06:05 PM   #7
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The performance improvement after a proper regear will blow your mind. Well worth the $1200 price tag
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Old 06-17-2013, 09:27 PM   #8
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i have the exact same problem, i have a 98 with 200k, 5spd, 4.0. I just bought it and have added, 2" coil spacers, 32" tires, intake, throttle body spacer, & banks monster exhaust. I also changed the plugs and wires. It Runs great, but in 5th gear it sort of loses power around 60ish and i have to bury the pedal to get it to get back up to speed and if I hit a hill.........forget about it, I have to drop down into 4th. I figured 32" tires with the 4.0 and 5 speed it should be ok, any suggestions?
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Old 06-17-2013, 10:54 PM   #9
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Quote:
Originally Posted by wranglahri View Post
i have the exact same problem, i have a 98 with 200k, 5spd, 4.0. I just bought it and have added, 2" coil spacers, 32" tires, intake, throttle body spacer, & banks monster exhaust. I also changed the plugs and wires. It Runs great, but in 5th gear it sort of loses power around 60ish and i have to bury the pedal to get it to get back up to speed and if I hit a hill.........forget about it, I have to drop down into 4th. I figured 32" tires with the 4.0 and 5 speed it should be ok, any suggestions?
As stated above...

regear

go to 4.56

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