Front axle ratio?
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Senior User
Joined: Mar 2007
Posts: 185
Likes: 0
From: Regina, SK
Front axle ratio?
Can front axle ratio be determined the same as the back axle? The jack up and spin method.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
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Not too long ago I swapped the back axle in my truck a 1975 crew cab with a low pinion D60 front and D60 rear. The rear tags said 4.10 but I figured I would check just to make sure. The one I swapped in was 4.10 turns on the axle to 1 on the tire. The other axle was already wrecked so I couldn’t check it. So I checked the front axle and it didn’t seem like it was matching up. I don’t remember for sure now but I am thinking it was 2 turns of the axle to 1 of the tire. It seemed odd so I checked the front axle from the donor truck and it seemed the same. <o></o>
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I convinced myself since the donor truck worked for 20 years with no problems, and it matched, that the transfer case changed the rate that the front axle so it wasn’t spinning the same speed as the back. Now I am having second thoughts.<o></o>
<o></o>
I have had the truck a couple of years and it has always seemed like it binds up and is tough to get out of 4wd. I originally blamed it on the 36” super swampers. Now it seems like the axle or transfer case is going (and it did start before the axle swap). So before I start changing the transfer case I want to make sure the ratios due match up.<o></o>
<o></o>
I would be sure the front axle is a different ratio if it didn’t seem to match the donor truck that work fine for years. I am going to check the donor truck again but it is 100 miles away.<o></o>
Any ideas? Am I counting wrong/seeing things?” <o></o>
Anyone jacked up the front and checked the ratio that way?<o></o>
fficeffice" /><o></o><o
></o>Not too long ago I swapped the back axle in my truck a 1975 crew cab with a low pinion D60 front and D60 rear. The rear tags said 4.10 but I figured I would check just to make sure. The one I swapped in was 4.10 turns on the axle to 1 on the tire. The other axle was already wrecked so I couldn’t check it. So I checked the front axle and it didn’t seem like it was matching up. I don’t remember for sure now but I am thinking it was 2 turns of the axle to 1 of the tire. It seemed odd so I checked the front axle from the donor truck and it seemed the same. <o
></o><o
></o>I convinced myself since the donor truck worked for 20 years with no problems, and it matched, that the transfer case changed the rate that the front axle so it wasn’t spinning the same speed as the back. Now I am having second thoughts.<o
></o><o
></o>I have had the truck a couple of years and it has always seemed like it binds up and is tough to get out of 4wd. I originally blamed it on the 36” super swampers. Now it seems like the axle or transfer case is going (and it did start before the axle swap). So before I start changing the transfer case I want to make sure the ratios due match up.<o
></o><o
></o>I would be sure the front axle is a different ratio if it didn’t seem to match the donor truck that work fine for years. I am going to check the donor truck again but it is 100 miles away.<o
></o>Any ideas? Am I counting wrong/seeing things?” <o
></o>Anyone jacked up the front and checked the ratio that way?<o
></o>
Senior User
Joined: Oct 2007
Posts: 114
Likes: 0
From: Sunshine Coast
The front and rear outputs on the transfer case spin the same speed as each other, whether you're on lo range or hi range. As far as the transfer case being hard to shift outta 4 wheel drive, alot of them do this. Some bind is normal. Usually backing up a bit helps to relieve this and makes it easier to shift out of 4 wheel drive.
Junior User
Joined: Apr 2007
Posts: 53
Likes: 0
Can front axle ratio be determined the same as the back axle? The jack up and spin method.fficeffice" /><O></O>
<O></O>
Not too long ago I swapped the back axle in my truck a 1975 crew cab with a low pinion D60 front and D60 rear. The rear tags said 4.10 but I figured I would check just to make sure. The one I swapped in was 4.10 turns on the axle to 1 on the tire. The other axle was already wrecked so I couldn’t check it. So I checked the front axle and it didn’t seem like it was matching up. I don’t remember for sure now but I am thinking it was 2 turns of the axle to 1 of the tire. It seemed odd so I checked the front axle from the donor truck and it seemed the same. <O></O>
<O></O>
I convinced myself since the donor truck worked for 20 years with no problems, and it matched, that the transfer case changed the rate that the front axle so it wasn’t spinning the same speed as the back. Now I am having second thoughts.<O></O>
<O></O>
I have had the truck a couple of years and it has always seemed like it binds up and is tough to get out of 4wd. I originally blamed it on the 36” super swampers. Now it seems like the axle or transfer case is going (and it did start before the axle swap). So before I start changing the transfer case I want to make sure the ratios due match up.<O></O>
<O></O>
I would be sure the front axle is a different ratio if it didn’t seem to match the donor truck that work fine for years. I am going to check the donor truck again but it is 100 miles away.<O></O>
Any ideas? Am I counting wrong/seeing things?” <O></O>
Anyone jacked up the front and checked the ratio that way?<O></O>
ffice" /><O></O><O
></O>Not too long ago I swapped the back axle in my truck a 1975 crew cab with a low pinion D60 front and D60 rear. The rear tags said 4.10 but I figured I would check just to make sure. The one I swapped in was 4.10 turns on the axle to 1 on the tire. The other axle was already wrecked so I couldn’t check it. So I checked the front axle and it didn’t seem like it was matching up. I don’t remember for sure now but I am thinking it was 2 turns of the axle to 1 of the tire. It seemed odd so I checked the front axle from the donor truck and it seemed the same. <O
></O><O
></O>I convinced myself since the donor truck worked for 20 years with no problems, and it matched, that the transfer case changed the rate that the front axle so it wasn’t spinning the same speed as the back. Now I am having second thoughts.<O
></O><O
></O>I have had the truck a couple of years and it has always seemed like it binds up and is tough to get out of 4wd. I originally blamed it on the 36” super swampers. Now it seems like the axle or transfer case is going (and it did start before the axle swap). So before I start changing the transfer case I want to make sure the ratios due match up.<O
></O><O
></O>I would be sure the front axle is a different ratio if it didn’t seem to match the donor truck that work fine for years. I am going to check the donor truck again but it is 100 miles away.<O
></O>Any ideas? Am I counting wrong/seeing things?” <O
></O>Anyone jacked up the front and checked the ratio that way?<O
></O>Well Ive heard about the turn the tire and count the spins of the drive shaft,,,,to find out the ratio--But Ive never done this,,,,,,how exactly is it done????? How accurate is this???? JUST CURIOUS THANKS------------------Robert
