Diff

[Dustyhd05]

Can I run just 4.56 in the rear diff and leave it stock in the front as long as I don’t engage 4wd? With drive shaft still attached? Replaced the rear diff and not front yet and my Speedo is way off.

 

[OR VietVet]

Did you not expect the speedo to be off with a new gear ratio? You did not supply ANY vehicle info.......Is it a secret?

 

[Dustyhd05]

Did you not expect the speedo to be off with a new gear ratio? You did not supply ANY vehicle info.......Is it a secret?

2006 tahoe z71 sorry about that it has 33 inch tires and 6 inch lift. The Speedo just changed dramatically I’ll have to get a tuner for it?

 

[Dustyhd05]

Did you not expect the speedo to be off with a new gear ratio? You did not supply ANY vehicle info.......Is it a secret?

I did expect it but I didn’t think a lot and can I just run rear gear for now until I get the money to replace the front

 

[OR VietVet]

The tires can have a lot to do with it too. There is a way to work it out on paper but yes, you will need some tune work. Contact a vendor here, Black Bear Performance, and see what they say.

 

[swathdiver]

Can I run just 4.56 in the rear diff and leave it stock in the front as long as I don’t engage 4wd? With drive shaft still attached? Replaced the rear diff and not front yet and my Speedo is way off.

Sounds like you've done it already. On the generation after yours, the computer system would have a fit with one axle turning a different speed than the other. Doing so on those turns off the ABS and other safety features.

 

[Dustyhd05]

The tires can have a lot to do with it too. There is a way to work it out on paper but yes, you will need some tune work. Contact a vendor here, Black Bear Performance, and see what they say.

Thanks for the help

 

[Dustyhd05]

Sounds like you've done it already. On the generation after yours, the computer system would have a fit with one axle turning a different speed than the other. Doing so on those turns off the ABS and other safety features.

Thanks for the info