Stock gearing differences???

[Nooch13]

I have heard a few guys on here saying that they run 2100 rpm with 31's at 55mph and a couple even claimed similar with 33's...Well, I have stock 225 tires and I am running 2400 rpm at 55mph. Is this normal??? It is a 98 TJ Wrangler with a 2.5

 

[OutOfStep]

sounds normal to me

 

[Bounty__Hunter]

Stick or auto? It matters since the auto has no OD and the manual does.

 

[Inspector-Gadget]

Oh My!

The number of engine cylinders might also matter in this comparison.

I would expect that a 4-squirrel Jeep engine would be turning a higher RPM than a 6-squirrel Jeep engine at a given road speed, with both transmissions in a 1:1 gear, with identically sized tires because of the higher (numerically) differential ratios typically supplied with the 4-squirrel powered Jeeps.

Yes?...No?...Maybe?

Gadget

 

[Nooch13]

Gadget,

That makes all the sense in the world. Sometimes its the obvious answers you miss! That makes me feel kinda stupid!

 

[Snitty]

that makes sense!

with stock gearing on a 4.0 (3.07:1), my odometer reads 1700 when the speedometer reads 65... but that would mean i'm actually going faster