Transfer Case

What is this part on my D20 transfer case? The transfer case currently mounted on my 1970 cj5 has this cap missing or broken off? Is this part of the casting or a seperate part. If its a seperate cap where can I find a replacement and how is it installed. I tried to show the part with a yellow arrow but it didn't come out to clearly. Also this is my first photo posting so I hope I got it right?

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The arrow didn't come out very good. I am wondering about those two caps on the left near the fill plug. The left one is missing on my transfer case.

 

OK I'll answer my own question. Its a "shift rod cap cover". How is it installed. Is it threaded, or press fit. Can it be installed with the transfer case assembled or does it install from inside of the case?

 

The older cases were cast on the later cases it is press fit on. Unless it is damaged take a block of wood hammer and wack it on, if it won't stay use red locktight and then put it on.

 

Thanks, the part is long gone so I need to scarp off the grit around where the shift rod is sticking out and try to see if this was part of the D20 transfer case housing or a press fit type.

 

You still have a model 18 in your '70? If so, you should be able to use the entire Dana 20 case. Guys, won't a '70 have the big hole case anyway? If so, all the Dana 18 guts will go in the Dana 20 case.

If that model 20 is part of another Jeep, D20s are cheap and available on the used market.

 

Timgr, I think I have a D20 in my 1970. My drive shafts are offset which I was told is a D20. And as I understand things the D18 has front and rear drive shafts connected inline. And no offense if you correct me I love to learn.

What do you mean by this? "Guys, won't a '70 have the big hole case anyway?"

 

If you still had the Dana 18, there are a few versions of it. The last version was the "big hole" version, which has a larger hole for the transmission output gear than the earlier versions.

 

The '70 CJ had an offset rear output model 18 transfer case where as you noted the two outputs are in line with each other. The 20 like you show has the rear output in line with the engine and transmission. If you have a 20 like shown in the pic then someone has done some swapping around. The shift rail covers on 20's are press fit into the housing. I'd put a wanted ad in the classifieds. Someone probably has one around.

 

Yes there's been changes and I just started to discover them. Most noted change was the addition of a SBC 283 engine. The rear brakes are 11" drums and the fronts are 10" drums (all brakes not working). Dual reservoir brake master cylinder. It has 3 speed transmission but I don't know what kind. I also have not found any tags on the differentials telling me what the ratios are. Also most of the underside is covered in mud. Had a small tree growing in the back seat area. My rear differential has the pumpkin centered. The front differential pumpkin is on the passenger side. It has manual Saginaw steering.

From what I've read here some of these items could have been stock except the engine. The vin plate says Kaiser-Jeep and the title says 1970. This jeep last ran in 1995 but I managed to get it started this weekend. I was thrilled.

 

Stock you should have had a t14 3 speed and dana 18 transfercase and 10" drums all around. Depending on when it was made in 1970 you could have had 1 piece flanged axles instead of 2 piece axles, both chunks should be offset to the passenger side(hence the dana 18) dana 20's were not offset in the rear. The dana 20 case can be used to repair a damaged late model dana 18 case as they are both large hole cases.

 

My guess is rear axle and transfercase was swapped-explains the brakes. I would assume you got the flanged axles in the deal so overall you have more desirable rig than stock. T14 trans with adapter plate to GM bellhousing?

 

duffer, my rear axle has small round caps in the center that appear to pop off. Haven't tried yet. Is this a flanged axle?

 

Flanged axles have no center caps They are basically flat in the middle. Is the cover on your rear axle round or look similar to a stop sign, if round its probably an AMC 20. Pictures would make all of this so simple. This is the end ofa flanged 44

 

Mcruff I will take a picture tonight and post back. Thanks for the help.

 

Mcruff here's the photo of my rear axle hub. What kind of rear axle do I have and is a Dana? And what number Dana?



Also thought I would show my leaking transfer case due to missing shift rod cap.



I have posted a WTB shift rod cap notice in the classified forum.

 

Definitely a model 20 transfer case, not original to that Jeep. Judging by the shape of the cover on the axle it's most likely an AMC 20 rear axle assembly, also not original to the Jeep. If you could get a pic of the diff cover we could verify that.

 

Nickmill, here's a photo of the back side of my rear axle. Can you ID what it is for me?



And a photo of the rear axle from the drive shaft side.



I guess while we're at can you ID the front axle? Here's a photo of the front axle, the steering stabilzer bracket is rubbing on the raised portion of the bell housing cover.



And front axle from the drive shaft side.



And the closed knuckle on the front axle.

 

Looks like the original front axle, which is a Dana 27. I recall there will be a "27" cast into the pumpkin somewhere, maybe in one of the webs?

The rear axle is clearly the AMC Corporate 20, aka the M20 or AMC 20. It was first used in Jeeps in the 1976 model. You should be able to find evidence that the spring perches were moved inboard to make it fit.

 

Thank you for the help. Is the AMC 20 good, bad or what. I don't plan to change it just want knowledge. Now I see why I have 11" drums on the back and 10" on the front.

I think I better check the gearing in both the front and back and make sure they're the same.