Help! Crusing @ 60mph 5th gear 4000 revs

[supkev]

Yea thats what I thought even a 4.10 is like at 3500-3700 I can barely keep up though my car is a stroker I can hit 110 mph but I'd be at 7k or beyond (I have no redline) but the only other thing I can think of is transmission gearing? I'mma change the diff fluid soon see if it helps

[e30loverSC]

what should it be?

[nando]

there is no diff ratio that would result in 4krpm at 60mph, even with slightly undersized tires.

something else is wrong.

[supkev]

I'm thinking might be my diff, I have stock weaves.

[A Sucked Orange]

Its either not 4k, or its tiny wheels, or its your diff.

[supkev]

Hmm I'll check that out but I highly doubt its that. I lined up with my friends car at 60 mph and it sounds like my car is at 4000 revs.

[Kershaw]

coding plug issue?

[supkev]

I have a euro cluster and I have a 3.73 lsd, anyone know what might be the problem? everyone thinks I got a 4.10 but thats not the case I went underneath my car and it says 3.73? anyone know what could be the problem?