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Lineset code question

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I have the lineset ticket for my 1955 R-202 and need to figure out my rearend ratio.

this is what i have for a line code

7049 Gear Ratio 1447 D

does this tell us anything?

TIA

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You might have a 14 tooth pinion and a 47 tooth ring giving a ratio of 3.36:1 which I doubt. Did you try crawling under the truck and seeing what is stamped on the housing? International was very good at doing this.

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You might have a 14 tooth pinion and a 47 tooth ring giving a ratio of 3.36:1 which I doubt. Did you try crawling under the truck and seeing what is stamped on the housing? International was very good at doing this.

nope, its like 9 degrees out with the wind screaming. even though its in the shed i dont feel like crawling in the dirt and trying to scrape old grease off...........im still cold from pushing snow earlier today <_<

where would it be if i did want to try and locate it? was it on a tag bolted on something like Dana axles typically have?

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7.049 might be a gear ratio? I think that It would be fairly close to what is in my 1700.

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7.049 seems like a pretty steep gear. How does your loadstar do running down the road (mph and rpm)?

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The ratio is stamped on the top of the carrier right near the pinion shaft unless it has been changed out (the carrier )

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I do have to admit that 7.049 is a possibility. My R130 has a 7.39 rear end .

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7.049 seems like a pretty steep gear. How does your loadstar do running down the road (mph and rpm)?

Sorry, I missed this.

About 65 mph at 4000 rpm. (392 gas.) Realistically it runs 55 to 58 comfortably.

I found that my rear axle is pretty common, it has electric shift and was made unchanged for a lot of years.

This might help with info locations.

http://www.dana.com/wps/wcm/connect/a3eaee004b289140aa75fff859534476/DEXT-axsm0040-0795_DriveAxlesServiceManual_LR.pdf?MOD=AJPERES

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PS: This is what my 1700 axle looks like.

post-546-0-95295300-1356548991_thumb.jpg

Friggin things are very large. No boubt a big ring gear. I can't find the right docs at the moment <_< but it seems like axle low reduction is around 10:1.

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My F700 has a 2 speed with the low end @ just under 10:1 (9.91---9:96 ??) -----high range is in the low 7-1 range. (429 engine with 10:00x20 tires)

Sounds like the same ratio that M-D has----most ratios were common for a long period of time. Gotta always consider tire sizes into the mix and intended original use.

Most I have seen are either stamped on the housing or carry a small aluminum tag with the ratios stamped on it.

DD

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I may just have to go out tomorrow with my flashlight and scraper to see if i can find the stamping. Mkaes me wonder what mine will be since its a single speed rearend. The truck has a 7 and a 3 in it behind an RD450. It runs some beefy 11.00*20 rubber

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well i went out with my scraper and my work light. what grease i could get to come off i didnt find anything. 50 year old frozen grease doesnt come off too well. however, the axle has a diff cover like you would see on like a smaller Dana even thoght the 'pumpkin' still comes out the front. so tomorrow im gonna take my cordless impact, and drip pan and see if i cant get in there and just pyhsically count the pinion and ring gear teeth and do some math.........

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For the gassers a 6:50 ratio was a racer ratio and the 7:17 ratio was a hard work ratio.These were Eaton ratios that was used when I first started trucking but don't hear tell of them much now.I suspect your ratio will be around the 7:50 mark.

Cooter

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Company I work for has had thousands of medium duty trucks with gas engines and single speed rear diffs. 7.17 ratio with tire sizes 8.25 x 20 all the way to 11.00 x 22.5.

The old trucks topped out about 55, the new ones over 70

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well, i went out and took a look. its a double reduction axle and i cant see all the teeth on all the gears to do the math.

i came up with 2 options.

A- find a 4900 or soemthing like that wrecked and just take engine tranny and rearend out of it and put it into the 202

B- leave the rearend in it, leave the brownie in it and just keep it in OD. put the 466 in it like i planed and run a straight 10 speed

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