I think its a tcase problem

[holley2346]

So about a week and a half ago I started hearing a ticking sound when coasting from 40 mph down. I asked around and discovered the chain in my tcase was most likely stretched and very loose. So I kept driving it.... then I started having some slack in my drivetrain only noticable when going over 40 mph. I wheeled today, and when I got home I SCREEETCHED to a hault 30 feet from my parking spot. I backed up a little bit and went forward again and parked in my spot without a problem.

My question is.... what on this gosh darn thing has broken now?

Am I going to have to drop my tcase and rebuild the dang thing?:mad:

Thanks for your assistance! I am supposed to be converting to propane thursday.

Mud season is quickly approaching! :fsj:

[j20brett]

Well, its pretty obvious you need a new tcase chain, and you are very lucky it didnt break your case when the chain jumped teeth and locked up on you. So to answer your question, yes a rebuild is in order. There are many threads here related to rebuilding the quadra trac that can guide you through it.

[holley2346]

What kind of tcase do I have exactly? I have looked around for the tag, but there is so much gunk and build up on it I couldn't find anything. Also, where do you reccomend getting the parts from?

Thanks!

Edit:

Note that this is a 1974 with a manual tranny.... online it said dana 20's were mounted behind manual trannies in this year period? If so, I don't see chains for them at bj's.

[imiceman44]

What kind of tcase do I have exactly? I have looked around for the tag, but there is so much gunk and build up on it I couldn't find anything. Also, where do you reccomend getting the parts from?

Thanks!

Edit:

Note that this is a 1974 with a manual tranny.... online it said dana 20's were mounted behind manual trannies in this year period? If so, I don't see chains for them at bj's.

If you do have the D20 you would have a floor shifter inside the cab, and if it is it doesn't have chains, it's all gears.
I doubt it would be that then. I have to think about what else could be wrong.
Are there any QT equiped manual trucks out there?

[holley2346]

It does have a shifter through the floor.... this really gets me then because now I have no idea what the speed related ticking noise is.... it sounded like my driveshaft was loose, but everything checked out when I gave it a look. Do these tcases break teeth often?

[j20brett]

Ah i was assuming you had the auto and qtrac tcase, so that rules out the tcase chain issue.

[holley2346]

Ah i was assuming you had the auto and qtrac tcase, so that rules out the tcase chain issue.

Sorry for not clarifying that in the first post. So has anyone experienced this, or have any idea whats going on? There are black skid marks in my driveway that extend about 3 feet, so the rear locked up somehow. I just was guessing this was related to my minute, speed related ticking sound. As well as the slop in my drivetrain (experienced when traveling at cruising speed and letting completely off the gas then pressing the petal again). I can't figure out how to exactly say it but there is slack somewhere.

[holley2346]

I am by no means a professional and am very new to fsj's. But here is my guess..... chipped a tooth somehow in the transfer case, the ticking is from the missing tooth. This tooth gets lodged in between some gears and causes everything to lock up..... possible? I don't know, it still doesn't explain the slop. :(

[Stuka]

Well, its hard to say. Your best bet is to drop the pan on the t-case, so you can see the gears. Spin the rear output so you can inspect the gears, and of course check for any metal that falls out. But when in 2wd, those gears are not meshing. So it seems unlikely.

I would not rule out the rear axle as being the culprit either. I have seen diffs that tick like that when decelerating.

[derf]

My vote is for chipped teeth as well. Possibly bad bearings. Dropping the pan and looking for missing chunks of teeth will tell you everything. Also, bits of metal swimming in the fluid will be a good sign as well.

[jaber]

I'm going to say its the rear end. Mainly because I had one do it to me. I sheared 2 teeth in each the 12, 3, 6, and 9 o'clock positions.

But I could be wrong, AGAIN....:D

[imiceman44]

I have to say Rea axle.
Unless you have some really lifted truck and the driveline angles are so bad a U joint is going bad and bound up.
But I am guessing a DD so maybe not lifted much.:rolleyes:

[KJ Ryu]

Are you driving in 4WD on the road? I ask because it seems like you thought you had Quadratrac but if you have a D20 and drive it in 4wd in high traction conditions, you can bind up the t-case.

[holley2346]

Are you driving in 4WD on the road? I ask because it seems like you thought you had Quadratrac but if you have a D20 and drive it in 4wd in high traction conditions, you can bind up the t-case.

No, I didn't think I had a quadratrac tcase.... that was suggested by the first person that replied to my original post. But I do not drive down the road in 4wd, and it was not in 4wd when it locked up.

I am going to take the cover off of the rear end this afternoon.

Thanks :)

[holley2346]

Well I found that the answer to all three problems was my rear end. This all seems to be caused by the small pin coming out somehow that holds the carrier pin in.

Problem 1: Slight ticking noise that was related to speed.

Resolution1: The carrier pin was sliding up and down in either direction but the ring gear in a little d44 prevented it from sliding completely out. So it just bounced back and forth from one side to the other (you can see in the picture how it beat the crap out of itself on each end).

Problem 2: Gap in the drivetrain somwhere.

Resolution 2: The pin was missing about a half of an inch or so in total length and when slid as far as possible in the carrier in either direction only one side of the pin was actually in one carrier hole at a time.

Problem 3: Wheels locked up and forced ~3 ft. of black marks on my driveway.

Resolution 3: Somehow a piece of metal or the carrier pin was lodged in the rear end and froze everything up.


My pinion gear has 3 very worn teeth now, but the ring gear looks good as new.

Here are pictures of the damage.

Thanks everyone for your help. :)

http://farm5.static.flickr.com/4057/4289434878_c44d053f02.jpg

Old pin is obviously on the right, glad I had a spare! :)
http://farm5.static.flickr.com/4035/4289435606_5c810f0b30.jpg

http://farm3.static.flickr.com/2718/4288694973_73478bf11b.jpg

[imiceman44]

Well I found that the answer to all three problems was my rear end. This all seems to be caused by the small pin coming out somehow that holds the carrier pin in.

Problem 1: Slight ticking noise that was related to speed.

Resolution1: The carrier pin was sliding up and down in either direction but the ring gear in a little d44 prevented it from sliding completely out. So it just bounced back and forth from one side to the other (you can see in the picture how it beat the crap out of itself on each end).

Problem 2: Gap in the drivetrain somwhere.

Resolution 2: The pin was missing about a half of an inch or so in total length and when slid as far as possible in the carrier in either direction only one side of the pin was actually in one carrier hole at a time.

Problem 3: Wheels locked up and forced ~3 ft. of black marks on my driveway.

Resolution 3: Somehow a piece of metal or the carrier pin was lodged in the rear end and froze everything up.


My pinion gear has 3 very worn teeth now, but the ring gear looks good as new.

Here are pictures of the damage.

Thanks everyone for your help. :)

http://farm5.static.flickr.com/4057/4289434878_c44d053f02.jpg

Old pin is obviously on the right, glad I had a spare! :)
http://farm5.static.flickr.com/4035/4289435606_5c810f0b30.jpg

http://farm3.static.flickr.com/2718/4288694973_73478bf11b.jpg

Well I thought of a lot of things that could have been wrong in there, that was not one of them. :eek:
I wonder where that missing piece is?

[holley2346]

Couldn't find any metal anywhere, but it may of slipped into the small drain pan hole somehow...

[mdill]

My Also, bits of metal swimming in the fluid will be a good sign as well.

I usually take this as a bad sign :p

Mike D.

[wickedwagon767]

glad you figured it out without any major carnage:thumbsup:

[fulsizjeep]

Well I thought of a lot of things that could have been wrong in there, that was not one of them.Me Too! Wow, just goes to show you, it is always something.

[holley2346]

I still haven't removed the old gear, does anyone know what size socket it is to remove the pinion? I removed the front one once, but know for a fact I had to burrow the socket. I'd like to stop by the store on the way to the shop and grab one, or a set if possible.


Thanks

[Locked and Loaded]

My Model 20 is a 1 1/8.

[holley2346]

I ended up just putting everything back together and ordering a 3.54 ring/pinion set from bj's. I welded the pin back into the carrier so I wouldn't have to worry about it anymore. :)