Gear ratio

[1978Blazerk5]

hey I have a 1978 blazer on 33's and it has a 12 bolt with 4.56 gears and a factory locker and a dana 44 with 4.56 open diff. my question is do I have to much gear ratio for the size tire im running.Just to let you guys know this is my DD.
Thanks

 

[barneybasher1010]

Check this site out it may help you http://www.superlift.com/library/gears.asp

 

[CDA 455]

Check this site out it may help you http://www.superlift.com/library/gears.asp

Hey, great info !

 

[1978Blazerk5]

thanks for the website um accordin to that i should have 4.11 or 4.27 gears oh well 4.56 are fine

 

[u2slow]

Depends what your drive is like. 4.10 & 33's was too much for my DD at hghway speeds. :shrug:

 

[1978Blazerk5]

my blazer at 60mph is just under 3000rpm's

 

[bdozeraz]

Just put some 35"s on and it will be perfect.

 

[southernspeed]

That must howel on the freeway! As said, 35's would be better. It will still be high reving but better.
And 3000rpm at 60mph? Hope you've got some good ear plugs!!

 

[1978Blazerk5]

i accualy drove the thing from california to wisconsin 2100 miles

 

[BigEasy]

You could always swap in a built 700R4 and have the best of both worlds (low gearing AND low RPM highway cruising). Otherwise I agree with replacing your 33"s with 35"s when it's time for new rubber.