Four wheel drive?
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Posting Guru
Joined: Nov 2004
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From: N. Mississippi
Four wheel drive?
I got to wondering about the rear axle under a 1986 F-150 4x4 that I just bought. The axle code is "19".....same code as on my 97 Lariat. Same rear end??
If so...it's non-limited slip...right? Ok....if so.....what about when I put the 86 into 4 wheel drive and get in some mud. Do both front wheels spin and just the one rear that's not getting any grip thus giving me three wheel drive?
This is my first 4x4 and I was just wondering about that.
Thanks in advance.
If so...it's non-limited slip...right? Ok....if so.....what about when I put the 86 into 4 wheel drive and get in some mud. Do both front wheels spin and just the one rear that's not getting any grip thus giving me three wheel drive?
This is my first 4x4 and I was just wondering about that.
Thanks in advance.
Lead Driver
Joined: Dec 2003
Posts: 6,773
Likes: 7
From: On the road in Ohio
If you can check the tag and look for a 3 digit number like this 3.55 or 3.73 that will tell you the ratio then if it has Ls either in front of the number or after , that means that it has a Limited slip rear = 3 wheel drive. another place to check is the door tag it will list the options of the truck. 
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
19 is the code for a 3.08 axle. The front is a 3.07. Actually a rare ratio for a 4x4. Most were 3.55. Both differentials are open, meaning when the tires spin, one wheel on each axle will spin while the other sits idly by. When the wheels aren't spinning, traction is distributed approximately equally.
Lead Driver
Joined: Dec 2003
Posts: 6,773
Likes: 7
From: On the road in Ohio
Originally Posted by andym
19 is the code for a 3.08 axle. The front is a 3.07. Actually a rare ratio for a 4x4. Most were 3.55. Both differentials are open, meaning when the tires spin, one wheel on each axle will spin while the other sits idly by. When the wheels aren't spinning, traction is distributed approximately equally.
Thread Starter
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Posting Guru
Joined: Nov 2004
Posts: 1,931
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From: N. Mississippi
Originally Posted by andym
19 is the code for a 3.08 axle. The front is a 3.07. Actually a rare ratio for a 4x4. Most were 3.55. Both differentials are open, meaning when the tires spin, one wheel on each axle will spin while the other sits idly by. When the wheels aren't spinning, traction is distributed approximately equally.
