Yeah, I can't comment on the manuals, but
Originally Posted by kjeeper10
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 !