rear end asploded. is it still driveable?

[SScamino]

Yea a bigger tire diameter lowers it to 1717 so.. that is strange indeed haha....

 

[-83MONTESS-]

With my TH400 and 255/60r15 tires I was running at 17-1800 rpm at highway speeds.

 

[Bonnewagon]

I agree, something doesn't add up. I have a 2:78 rear, 205-75-15 tires, and I turn 2000 rpm at 55 mph. Maybe your speedo gear is wrong?

 

[stockgp]

my speedo is always accurate when i go past "your speed is" signs

 

[Bonnewagon]

HA! I do the same thing. But then why are you spinning so high? Strange.

 

[Bonnewagon]

This calculator says you should be going 87.24 mph with your set up.http://www.wallaceracing.com/calcmph.php Could the tach be off?

 

[stockgp]

you're guess is as good as mine. i even had someone pace me after i installed the rally cluster and i was only off four mph at 60. and to be perfectly honest, i'm not entirely positive my car could break the 85 mph mark on the speedo :lol:

no, it can. i'd love get this pig to \drop 800 rpm at highway speeds. might actually keep me from selling it

 

[pontiacgp]

have you never has the cover off to change the diff oil and check the gear ratio you have?..

 

[stockgp]

if you go back to the FIRST post, you will clearly see pictures of my OPEN rear end. and i also posted a few after that that my ratio is 48:21 or 2.29:1

if you are asking if i've had the cover off before this incident, yes i have. changed the fluid once and considered changing gear ratios until my job moved further away

 

[-83MONTESS-]

Glad I could help ya out with the rear end. Hope everything works out.