Do I have an aftermarket rear-end?

[Deus Est]

I'm at around 2100rpm at 70mph. Anyone think I have an aftermarket gear ratio?

And instead of making a separate thread about it, I also have a question about a rattling noise. Under load (like when going up a hill) in 4th gear at low RPM, I hear a rattle coming from the transmission area. Is this normal?

Thanks again fellas.

[Paul T. Casey]

I'm at around 2100rpm at 70mph. Anyone think I have an aftermarket gear ratio? No

And instead of making a separate thread about it, I also have a question about a rattling noise. Under load (like when going up a hill) in 4th gear at low RPM, I hear a rattle coming from the transmission area. Is this normal? No, I'd check it.

Thanks again fellas.

See above sir.

[Deus Est]

I don't follow.

How can I move this to the technical discussion thread?

[Blackmobile]

I have a set of 4.10's and at 2k RPMs i'll be doing about 60 MPH, so No it appears you have a stock set of rear gears.

[Paul T. Casey]

I believe you have stock gears. I also believe you have a tranmission issue if it makes a rattling noise going uphill.

[Deus Est]

Thank you for your responses.

[justbob]

Mines stock as far as i know and yes i would say 2100-2200 at 70-75.