Your rear has 5.14:1 gears.
I run my truck (with SM 420 4-speed trans) in the 3500 rpm range all the
time and I use regular gear oil. Truck weighs 10,000 pounds empty.
'56 4400 Stake
'56 6400 Stake
'56 8400 Wrecker w/Holmes 525
'56 9200 Tractor w/Allison Automatic
'57 10500 Fire Truck
----- Original Message -----
From: "mark" <email@example.com>
Sent: Thursday, September 30, 2004 11:48 PM
Subject: [oletrucks] rear axle ratio 55TF
> i have a one-ton dually 55 TF camper with the BIG stock 18" wheels 8 lug.
> i want to know the rear ratio if anyone has a book or knows-please contact
> i just completed the swap from 235 to a stock-looking(original links even)
> 350 and let me tell you-7200# moves down the road quite a bit faster. took
> weekend and went to big sur-drove over 800 miles round-trip at over 70mph
> and it was cool and i even had secondaries left over to punch it around
> had a few concernes about the stock 4spd tranny spinning fast so was
> thinking of adding synthetic gear lube to the trans and axle.
> northern california
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