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Old 09-24-2011, 09:27 PM   #61
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Yeah, I can't comment on the manuals, but


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Originally Posted by kjeeper10 View Post
Hence a Tuner or uh um.... SprintBooster

The stock throttle response in the pre 12 jk is toned down for a couple reasons. no secret... Glad they worked it out.
With the sprint booster I don't have to wind it out to 3000+ before I shift. I would hit 2300 ish-depress the clutch and give it gas, the rpms would sink to under 2000 before it cought up.. We all no the 3.8 performs poorly under 2000 rpms. A tuner has been noted to help also with TR.

Don't know if regearing would help. Plus most people regear for bigger tires and/or the AT.
Have not seen a performance regear yet.
With my 5.38s and in 2hi, all shifts, including downshift on demand (foot) are very quick and abrupt--

Now in 4lo--GADZOOKS-HANGON TO YOUR TEETH--when I drive in 4lo "D", the shifts are LIGHTNING/JARRING

Need someone with some 5.13/5.38 --(manual) advice and there ain't many !

JIMBO

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Old 09-24-2011, 09:42 PM   #62
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Quote:
Originally Posted by JIMBOX
Yeah, I can't comment on the manuals, but

With my 5.38s and in 2hi, all shifts, including downshift on demand (foot) are very quick and abrupt--

Now in 4lo--GADZOOKS-HANGON TO YOUR TEETH--when I drive in 4lo "D", the shifts are LIGHTNING/JARRING

Need someone with some 5.13/5.38 --(manual) advice and there ain't many !

JIMBO
Ya I know but

You have 33's correct?

So your 5.38's puts you in the the performance range. Heck, the 4 speed auto needs at least what? 4.88's to be comparable to a rubi with 4.10's

With the manual 4.56's would be similar with stock 32's. (too you)
I could not justify spending that much money going from 4.10 - 4.56

I would really like to find someone who has 4.88's and a manual.. And see how that goes

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Old 09-24-2011, 10:01 PM   #63
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Heh Heh, just let me say one more thing tonight--


Quote:
Originally Posted by kjeeper10 View Post
Ya I know but

You have 33's correct?

So your 5.38's puts you in the the performance range. Heck, the 4 speed auto needs at least what? 4.88's to be comparable to a rubi with 4.10's

I could not justify spending that much money going from 4.10 - 4.56

I would really like to find someone who has 4.88's and a manual.. And see how that goes
For the 42rle auto/wrangler 4.56 is a total abomination and should never be used in a jeep--There's no difference in it's use for 32" tires and a complete failure in 33" tires-

4.88 ring/pinion is the MININUM RATIO, that anyone should pay good money for a regearing --manual/auto

JIMBO
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Old 09-24-2011, 11:35 PM   #64
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I've had 4wd Taco's and an FJ. The 4.0 is easily stronger and sounds right but the slush box in the FJ was the reason I bought a 12 Wrangler w/6spd. Not sure about the 3.8 but this motor is way better than the old straight 6s of old.

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