NP200 Leaks

[Jester]

Put new aftermarket seals in and she still leaks like mad. Did not speedi-sleave the yokes but they did not appear grooved.

What next? I can drive very far before it leaves a puddle under the truck.

I am really at my last straw with this thing - about ready to yard it and put in a NP205.

[brute4c]

What fluid are you using? If you run synthetic, it will leak more...

What seals? The mil ones are usually have a better double lip type with a stronger metal hull where some of the civvy ones have a thinner hull and a single lip seal...not as good at all.

[Jester]

What fluid are you using? If you run synthetic, it will leak more...

What seals? The mil ones are usually have a better double lip type with a stronger metal hull where some of the civvy ones have a thinner hull and a single lip seal...not as good at all.

Running reg gear oil. Using the civi seals. It leaks ALOT. After driving for 30 mins or so it will leave a puddle.

[Barrman]

I don't know what to tell you. My old seals only leave a few drops if I have driven the truck more than 100 miles at a time. Otherwise, it just looks oily.

Can you tell where it is leaking from? It shouldn't be all of the seals unless somehow, you got all wrong ones.

[Jester]

I don't know what to tell you. My old seals only leave a few drops if I have driven the truck more than 100 miles at a time. Otherwise, it just looks oily.

Can you tell where it is leaking from? It shouldn't be all of the seals unless somehow, you got all wrong ones.

Yup - basically leaking from the 3 seals I replaced. Can see the trail.

I used the part number listed here to get the Timken seal.

[fisherman]

The seals you replaced are? Front and rear output seals? The seal for the stub shaft? My guess would be the yokes are worn enough you are not getting a good seal. You would need the speedy sleeves and another reseal. Not worth the time or effort on a 200. You better start looking for a 202. A 205 will work too. I just know how to install a 202 thats all.

[Jester]

The seals you replaced are? Front and rear output seals? The seal for the stub shaft? My guess would be the yokes are worn enough you are not getting a good seal. You would need the speedy sleeves and another reseal. Not worth the time or effort on a 200. You better start looking for a 202. A 205 will work too. I just know how to install a 202 thats all.

Pretty much what I figure too. I have put a lot of work into that boat anchor.

[randyscycle]

Wipe the seals off really good and then check to see where the oil is actually coming from.

I have found that a lot of transmission and pinion seals along with transfer case seals will leak not from the seal itself, but from around the metal housing when its driven into the housing. I started using Permatex Form-A-Gasket around the outer circumference of the seals before driving them in now.

[Jester]

Wipe the seals off really good and then check to see where the oil is actually coming from.

I have found that a lot of transmission and pinion seals along with transfer case seals will leak not from the seal itself, but from around the metal housing when its driven into the housing. I started using Permatex Form-A-Gasket around the outer circumference of the seals before driving them in now.

I will look at that

[moosejr]

Another thing to look at, sometimes the splines get a little loose and the oil can seep from the spline itself. When I put yokes on, I put some sealer on the spline itself before I slide it on. . .