Interlock rods

[bright87]

When I disassembled my transmission/transfer case, the two interlock rods and the two hole locking spacer from the rear of the shift rods are all missing.
Is it a common practice to remove them so you can use the front axle when you are in higher gears?
Any experts out there?
Michael

[steve-0]

it was talked about here
http://g503.com/forums/viewtopic.php?t=129864

[HenryVIII]

I took my transmission completely apart to rebuild it. When i put it back together again I did not completely understand the interlock system. when I did realize what it did, I decided to remove the interlock system. so I pulled out the interlock rods and the slider locking thingy. What I did not realize until later is that there is a half moon key in a slot in a shaft way down in there. Its the first shaft you put in during reassembly. Anyway if you do not also remove this key you have a crazy combo of shift pattern to get the 4wd engaged  I think it is something like it has to be in low range, and low gear to engage the 4wd. And after it is in 4wd you can shift into any gear as long as you do not shift out of 4wd. once you shift out, it has to be in the one special combo to get back into 4wd. I tried every possible combination of gears and wrote it down and can still hardly understand it.

I just use 2wd and it shifts normal but 4wd is there if it is needed. My advice is either leave it all in or take it all out. But with only some of the parts removed its even more complicated than normal.

It says in the operators manual how it shifts. This is from memory but it is something like it has to be in 4wd for all low range and,  hi 1and 2 and reverse, optional in a couple of other gears but must be in 2wd in the higher gears.

If some one has the book handy please correct me if I am wrong.  I will look it up when I can and make corrections as necessary.

Thats what I know about interlocks. I think I may still have the rods and slider lock around somewhere.

Henry

[spec4don]

Most of the halftracks I've seen have the inter locks removed. Otherwise like the jeeps you would have to have the front axle engaged in low range. Also from what I read the interlocks were removed when the halftrack was used as a prime mover. It would give you some extra gears, you could split shift the transfer case. Normal operation would be the front axle could be shifted in or out with the transfer in high range. With interlock the front axle must be engaged to shift into low range. 

A lot of the jeep guys remove the interlock so they can use low range in parades.

My 2 cents!

Don G.

[HenryVIII]

I just found it in the tech manual TM-1710A page 110 says. "interlocks are arranged so that Front drive must be used in first and reverse speeds with the transfer case in underdrive; Front drive may be used in first and reverse speeds with transfer case in direct drive; and Front drive cannot be used with second, third, and fourth speeds."

If you remove the interlocks you should be able to use 4wd with or without any gear combination.

Just wondering.... can you drive the vehicle with a missing track in 4wd if you could keep the bogies from sinking in too much?

Henry 

[spec4don]

That's the way mine drives now, I can go into low range and not have the front end in. Works great for Parades. and yes you can drive it around just using the front end. Ask Steve1973!

Don G.

[steve1973]

I know this has been talked about before but I have a question as what all parts need to be removed to have the interlocks removed? My mechanic has gone through my transmission and said I'm missing some pins in the top cover shift rods. According to him I'm missing "C" in the top diagram. In the description in the parts manual it is described as an interlock pin. Should this be left out or do I need it?





Thanks,
Steve A.

[dwhite]

You'll need pin "C".  The piece that can be omitted is plate "B".  DW