The Stovebolt Site Forums The Parking Lot Big Bolts 49 one ton rear end

I have a buddy that's wanting to gear his one tone up. He currently has 516 ratio and would like to go up to around 410. Where would be a good place to look for either a third member or a whole axle.

The 3rd member is the same up to '72. Try looking around at the salvage yards, the later 3/4 tons usually had the higher ratios and will swap right in.

Thanks for the reply. Thats what I told Joe but then I got to thinking about it I wasn't sure. Are these rear ends tagged in any way or are we going to have to do the turn and count to find out the ratio.

Thanks Tony

Are you sure that isn't a 5.13 ratio rear? That's what it should be if it's from a 1 ton. Go advertise on the 67-72 Chevy board ( http://67-72chevytrucks.com/vboard/index.php ) that you have a 5.13 that you'll trade for a 4.10. You might get a bite. Also look on Pirate 4x4. Turns out the 4x4 guys really want these 5.13 ratio gears. They are more rare than the 4.10's. The axle is highly desirable, as it is a super tough "bullet proof" axle, with decent ground clearance.

I've heard rumors of a 3.90 that only fits in a 67-72 carrier, but I've never seen it, much less seen one for sale. I'm keeping my eyes open though. The 4.56 is a compromise from the 5.13, but won't give you that much. The 4.10 with stock rims won't get you that much speed. Your still not looking at going out on interstate.

The only way FOR CERTAIN that I know to determine the gears, is the lift a wheel and spin and count. No... that's not true. You could take out the carrier and count the gears... but that is much more labor intensive.

I've got a 4.10 with correct 17 spline Detroit Locker in transit to my house today! This will go on my 58 1 ton. I have the same issue, wanting to drive faster than 40 mph. The gear should help. The Spicer Auxiliary (with 0.8 OD) I've pulled off a doner should help even more. With the auxiliary I've got a 2.3 Lo Lo gear, that will give me stump pulling low that I'd otherwise lose when replacing the 5.13 with the 4.10. Then with my main in 1:1, auxiliary in 0.8, 4:10 gears, and 19.5" tires, I should be able to drive 60 mph at 2000 rpm. I DON'T plan on driving that fast while carrying 2 tons of stuff. Brakes are still stock.

This is a project that a friend of mine has started and I am not sure of the correct ratio but it is from a stock untouched 49 3800. I've tried to talk him into auxiliary but he is a little shy about adding one. He's not looking at going on the interstate mostly two lane roads and 55 mph and a few less rpms.

Thanks tony

I just swapped the 5.13 in my one ton with a 4.56..makes about 10 mph difference.. i wouldnt want to go any higher than that tho..cuz i doubt the 235 would pull that one ton up hills or against wind goin too fast... the 4.56 is about all i want.. i can still do 55 without over rappin and still take some fairly decent hills. i havent had a 3 ton load of gravel on it yet with that in to know how it pulls....

Should be a 5.13, that was the standard ratio in 1 ton to'65, 4.56 was standard later. 3/4 ton was usually 4.56 until the mid 60s, 4.10 was available then. There is a rare 3.54 ratio that was '72 only. I've only seen 1 in person so far.

have a 4.10 in my 54 1ton panel(235 with 6.50x7.50 12ply tires) , drive it back and forth from weatherford to ft.worth on I20-30 and have no prqblem driving at 65 and 70. there is one hill that requires driving in the right lane but,if i get a full head of steam up i can still be at 60 when i get to the top.

tony'n weatherford

whats the diameter of those tires..thats prob the diff... mine are 18 inch wheels that are about 33 diameter of tire... that 6.50 is probably about 30 inch..?? are they 16 inch wheels..?? anyway no biggy.... the 16 inch wheels would take a higher rear end to be the same....

Sounds like changing the pumpkin is the solution.

If yer friend wants to haul with it, like a 1 ton, then you better leave that 5.13 in. Iffn it's only the occasional light haul, then the 4.56 probably good n'uff. Just wantin to cruize around town and haul grocieries, then the 4.10's yer ticket.

I've heard of a 3.90 and the 3.54 gear set, but never seen one. I've also heard of a 5.83 gear set, but never seen one of them neither. I've often wondered if someone didn't confuse this axle with an Internation that looks nearly identical, and had the 3.54 and 5.86 gears... but I don't know I havn't seen the entire world yet.

By the way... my locked 4.10 just came in. Sweeeet.

those rims are 17in and counting the tire with about 55lbs of air i measure almost 33inches in height.

tony'n weatherford

Hi Gents
Just for a Point of Info...
The 3800 series came with a 5.14 Ratio Rear or 3rd member as it were.
And standard tire size of 700-17 tires
RPO option of 750-17 tires
Regards

That for the one ton pickup?... my 3800 dual wheel one ton cab chassis type has 18 inch wheels..

yes, 17 on pickup, and 18 on dual wheel 1 ton.

err... ummm...

19.5" tubeless on my dual wheel 1 ton.

Perhaps it is best to say that there were many different wheel options on these trucks, and that they differed year to year.

i cud be wrong.. but those 19.5 tubless are addons i bet.. i dont think tubeless truck tires were even invented in 58....i had a 59 one ton for parts that had 18's on it.. and if they were tubless id of been usin them...

Weed,

I'll have to check my manual about the tubless part as I'm not certain about that. I've never heard of a 19.5" tubed tire... but there's lots I've never heard of.

I've got SEVERAL resources that state that 19.5's where an option on 1958 1 tons, and where the stock tires on the heavy capacity dually (Shop manual, restoration manual, my truck). The PO stated that the truck was all original, bought from the dealer (except the hydraulics for the dump bed which had been replace... and yes the dumpbed was a dealer addition Knapheide bed). The sticker inside my glove box lists 19.5" tires.

The rims have KH stamped on them (Kelsey Hayes?). They outer ring is riveted to the center disc (I know this is old style manufacture). The stud holes are the smaller 1/2" instead of the more modern 9/16" that you see today. The width is 6", not the larger size you see today (i.e. 7" +) to accomidate the wider lower profile 19.5" tires (i.e. 245 70R 19.5).

My 1 ton has the 18" wheels, with 7.oox18 tires. Tires were new shortly before it was parked apparently, now have some checking and dryrot. Tubless would be great!

cool.. then ya could probably run 8.25 20s on it and not notice a big diff huh..??? and they sound original to me too now.... i wonder if that option was added by the knapeheide company..?? probably not... no biggy wonder when they came out with that option...???

my one ton has 18 inch wheels

my one ton bus had 17 inch wheels on the front and 17 wheels on the rear.