by oldspwr » Fri Jun 23, 2017 7:42 pm
Hi benji...
Let me see if I can help a little bit...
>Frame...155W-20-135 1/2-55759
>Serial no. off the dash 155w-20-55759
Based on the serial number, 155w-20-55759, I believe your truck is a 1958. I have 1958 listed from 55500 to 56199. My '55 is 155W-10-52856 and the original TA-66 steering box had the integral column. I replaced it with a TA-66 box with a u-joint from a 1958 155W parts truck (serial number 55608)
>trans..first letter is obliterated..? -A-430
The full number is 5A430. This is an 5 speed Fuller and 5th gear is overdrive. If you notice, your fifth gear is towards the dash. That means its an overdrive. If was was back towards the seat, it would be a direct drive trans, or model 5A43. I have an older Fuller book dated 1965. The 5A43 and 5A430 were for 'Approximate motor size, 6 cylinder gasoline engines 430 cu in. This is for use only as a guide in making preliminary selections.' So the 5A33 and 5A330 were for 330 cu in motors, 5A62 and 5A620 were for 620 cu in motors, etc...
Hear are the gear ratios for both trans...
5A430 6.52 3.33 1.77 1.00 0.771
5A43 8.03 4.61 2.46 1.41 1.00
> Rear member...huge cast steel, air actuated 2 speed
Your rear is an Eaton 2 speed. I believe the model number is 20501 or 20503 but these are Brockway numbers, not Eaton. They had (3) gear options, including 5.43/7.39, 6.14/8.66 and 6.71/9.13. I had the 6.71 ration but was able to find a set of 5.43's for it. It you look at the head of the pinion, the ring and pinion numbers will be stamped there. Divide these out to get the high ratio of your rear.
>I have acquired a beautiful set of fenders of the same vintage to replace them.
They may have relocated the headlights to the fenders by 1958. I'll have to take a look at the fenders that came with my '58 parts truck.
>Cab has hinged rear corner vent windows, curved plastic.
These rear windows came standard on the 155W's.
>Air breather is under the hood as you can see by the round screen in the hood.
Both my '55 and '58 had the air cleaners under the hood. I have paperwork with my '55 that says it went back to the dealer in '58 and had a new Zenith carb and air cleaner installed.
>Has Brockway heater!
The square heater was actually made by Evans and it has an oval Brockway tag on the front.
Hope this info helped! If you have any other questions I would be glad to help...
I may have a front axle with buds for sale but it's pretty rusty.
Tom