66 k20

[jdl71]

Originally Posted by raylube

How's the rear axle coming along?

I bought a 4:10 ho72 last weekend and I’m going to pick up another later this week don’t know what ratio yet. Haven’t done any more.

[Short 3/4]

I think your going to like that 4:10 rear, it's a great ratio for these trucks. You can still pull, but allows you to cruse at 60. Should be no problem finding a matching r&p for the front Dana 44 (new or used), much more common than for the HO rears.
While your tearing into that rear, now is a great time to weld in a pipe bung for a drain plug. That's the one thing they are missing, and with clean oil they truly last forever.
I'm putting my money on your noise being in the transfer case. Even after a total rebuild of mine, truck still sounds like it has a bad ring and pinion about to blow. As I said in an earlier post I ran the truck with Xfer bypassed during rebuild, so I know exactly where the noise is coming from. Looks like my next project is some serious sound proofing.
Keep up the good work on the project,
Tom

[jdl71]

Originally Posted by Short 3/4

I think your going to like that 4:10 rear, it's a great ratio for these trucks. You can still pull, but allows you to cruse at 60. Should be no problem finding a matching r&p for the front Dana 44 (new or used), much more common than for the HO rears.
While your tearing into that rear, now is a great time to weld in a pipe bung for a drain plug. That's the one thing they are missing, and with clean oil they truly last forever.
I'm putting my money on your noise being in the transfer case. Even after a total rebuild of mine, truck still sounds like it has a bad ring and pinion about to blow. As I said in an earlier post I ran the truck with Xfer bypassed during rebuild, so I know exactly where the noise is coming from. Looks like my next project is some serious sound proofing.
Keep up the good work on the project,
Tom

Your statement about the xfer case is in the back of mind every time I fool with it lol. I'm stubborn though and I won't let it go until I've swapped 3rd members and at least drove it once to confirm. Plus the one that's in it has a ton of lash.

I looked at Randys at a r&p set for the front, it wasn't too bad but they said I would likely need a new yoke as the old ones were coarse splined. I'm going to pick up this other center section this weekend and see what ratio it is then make my decision.

I've also been thinking about dynamat or some sort of home depot knock off, and just ignoring the noise until something blows up. I called a local trans shop that I know does t-case rebuilds to see if they had ever worked on one of these, when they mentioned TorqueKing as a parts source I had a feeling they could handle it. Looks like a monster to get out of there though.

Thanks again for all your advice, I really do appreciate it. Been waiting and hoping you'd chime in shortly.

[jdl71]

I like these nmo antennas, they flex easily and don’t look obnoxious. I don’t know if this is ideal mounting spot (I know the middle of the cab would be best) but I’m going to try it a while.

[raylube]

I hope your rear gears fix your problem. The xfer case is easy to drop out. The upper rear input shaft bearing will come out easy with out pulling case out at least it did on mine. I would look at the shop manual and see if you can fix it yourself it not too complicated. It'll save you money as all parts alone at least 500. And if you need input shaft its near unobtanium.

[jdl71]

Originally Posted by raylube

I hope your rear gears fix your problem. The xfer case is easy to drop out. The upper rear input shaft bearing will come out easy with out pulling case out at least it did on mine. I would look at the shop manual and see if you can fix it yourself it not too complicated. It'll save you money as all parts alone at least 500. And if you need input shaft its near unobtanium.

I’ve wondered how much I could do without pulling it. It doesn’t look complicated to get out but heavy and I don’t have a tranny jack or any help to speak of. I know it needs seals for sure. I’m going to look through the manual again. Thanks, you’ve given me some encouragement to try.

[straight6chevyguy]

Originally Posted by jdl71

I like these nmo antennas, they flex easily and don’t look obnoxious. I don’t know if this is ideal mounting spot (I know the middle of the cab would be best) but I’m going to try it a while.

Since it looks like the antenna sticks up above the cab it should work ok but you really wont know until you try it.

Sometimes short antennas that are shorter than the height of the cab tend to have some of the signal blocked or sometimes wont tune correctly because of funny signal reflections from the metal truck cab being right next to the antenna.

[j.kirn]

Originally Posted by jdl71

I bought a 4:10 ho72 last weekend and I’m going to pick up another later this week don’t know what ratio yet. Haven’t done any more.

never heard of a 4.10 gear ratio in a HO72, I have seen them in a HO52

[jdl71]

Originally Posted by j.kirn

never heard of a 4.10 gear ratio in a HO72, I have seen them in a HO52

It was in a 70 3/4 ton 4x4. Has the adjuster bolt on the yoke which I thought only the ho72 had. 41 10 stamped on the ring gear. Guess someone could have regeared it but the front axle was 4:10 also

[j.kirn]

Originally Posted by jdl71

It was in a 70 3/4 ton 4x4. Has the adjuster bolt on the yoke which I thought only the ho72 had. 41 10 stamped on the ring gear. Guess someone could have regeared it but the front axle was 4:10 also

A H052 is a 3/4 ton , a HO72 is a 1 ton axle

[jdl71]

Originally Posted by j.kirn

A H052 is a 3/4 ton , a HO72 is a 1 ton axle

Was there an HO52 with the load bolt?

[j.kirn]

Originally Posted by jdl71

Was there an HO52 with the load bolt?

yes

[jdl71]

Originally Posted by j.kirn

yes

I stand corrected then. I was under the impression only the 72 has that.