Diff ratio

[love macks]

I have purchased a rolling chassis Flindstone model Mack.  The diff ratio is stamped 7.00 on the id plate. 

Are these Diffs worth much??

also the brake boosters look more like canisters as opposed to the normal 30/30 style brake booster, con anyone help identify these for me?

thanks. 

[j hancock]

A picture of the brake chamber would be helpful to see what you have.

Low gears like that are not really sought after.  Vlad was looking for around 6.5 ratio but 7.00 may interest him.

[mrgumby]

does it look like this

Edited September 23, 2017 by mrgumby

[david wild]

roto chamber

[h67st]

My '60 H67ST has that style chamber, and there isn't room to replace them with #30 chambers (would hit the tires). It has a camelback tandem. Can you get maxi brakes that style?

[Vladislav]

I doubt on much worth of 7.00 carriers. The most trucks running commercially seldon use lower than 5.73 with 5-6-7-8 speed tranny's (0.6 OD) or 5.02 and much faster with muli speed transmissions on the highway rigs.

As for my need my original carriers have too low bull set of geras. And I can not install them faster ones from more modern CRD92/93. Can play with top (bewel) gear sets only. Or I could be happy finding complete diffs off a L-model (old 10 bolt mounting pattern) with a ratio of around 6.00. But they seem rare roaming around a hobby market.