T-176 Rebuild - JeepForum.com
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post #1 of 60 Old 05-31-2011, 08:58 PM Thread Starter
SpringPro
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T-176 Rebuild

Picked up a T176 tranny and Dana 300 transfer case the other day with the intent of installing behind a SBC 350 in my CJ 7. The tranny was the first on the list for cleaning/rebuild. Parts ordered from Novak so it was time to open her up. The tranny shifted smoothly and sounded good when spun by hand. Upon removing the top cover I noticed that one of the syncros was broken and the gear behind the 4th gear on the main shaft has a half moon piece missing. The rest of the gears look good as well as the counter shaft and reverse gears. I am guessing that I will have to purchase a whole new main shaft to replace the broken gear piece behind the 4th gear. It doesn't appear that it can be removed and I have not seen it on any of the diagrams as a separate piece. The bearings did not give me to much of a problem and as recommended I bought a good pair of snap ring pliers. That made a huge difference. At this point I am cleaning the case and waiting on the rebuild kit. Any advice from the pros?

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post #2 of 60 Old 05-31-2011, 09:39 PM
littlebuddie
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Wow, any idea how the input shaft broke? Can't help much, I've just opened my first T176 and looking for parts for it but I'll sure follow this topic to see how you get along.
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post #3 of 60 Old 05-31-2011, 10:00 PM
benullman
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do you need a bellhousing adapter? I have one for sale if you do.

Going to be keeping tabs on this one!

Ben

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post #4 of 60 Old 05-31-2011, 10:06 PM Thread Starter
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I got the entire housing from Advance Adapters but thanks. So far it has not been to bad. This is my first tranny rebuild and then it is on to the Dana 300. I just finished soda blasting the tranny case. Planning on shooting it with epoxy primer and then paint. I guess I will have to start looking for the main shaft as well.
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post #5 of 60 Old 05-31-2011, 11:20 PM
MoC
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Part #13 here? Post a clear picture of it from the top looking down plz.


BTW....Your pictures are huge making it really hard to read your paragraph

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post #6 of 60 Old 06-01-2011, 02:07 AM
John Strenk
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Need to get some terms correct here or you will get the wrong part.

The part the clutch is placed on is known as the Clutch shaft or sometimes input shaft or main drive gear. It's the gear that turns the counter shaft gears for 2nd, 3rd and 4th gears
Technically, there is no 4th speed gear. The Clutch shaft is connected directly to the main shaft in 4th gear.

The main shaft, or spline shaft, support the other gears, allows them to spin freely when not engaged.
You MIGHT need a main shaft also but not because of a broken gear but the splines that go into the tcase look worn and will be sloppy and wear out quicker.

This picture is from the factory service manual:
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post #7 of 60 Old 06-01-2011, 06:12 AM Thread Starter
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Thanks Moc and John. Yea I should have been a little more clear with the part names. I will try to figure out how to resize the photos. I thought I had it last night but they posted full size. I am sure I will have many more questions once I start removing gears and attempting the reassembly.
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post #8 of 60 Old 06-01-2011, 12:11 PM
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Quote:
Originally Posted by John Strenk View Post
You MIGHT need a main shaft also but not because of a broken gear but the splines that go into the tcase look worn and will be sloppy and wear out quicker.

:
Springpro,
John Strenk has good eyes. Take a closer look at the output splines on the main shaft. It appears they may be worn. Post a closeup pic of the splines if you're not sure.
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post #9 of 60 Old 06-01-2011, 12:16 PM
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Thought I saw that also, that's why I wanted to see a picture from the top looking down at the area.

Under A Sun Thats See It All Before...
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post #10 of 60 Old 06-01-2011, 12:16 PM
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Edited your pic:
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post #11 of 60 Old 06-01-2011, 12:25 PM
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i'd like to see that close up too. im getting ready to dig into the same project and would like to learn from your findings.

Torque is the measure of force that gets the cap off your beer.


Mike D.
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post #12 of 60 Old 06-01-2011, 02:55 PM
LSUtiger
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That is what broke on mine. Everything circled broke off into the tcase. I want to use it to make a shifter handle.
Also I think the splines are good. The first 1/2 inch or so is flat then they taper into tighter splines.
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post #13 of 60 Old 06-01-2011, 03:09 PM
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If the 'half moon' piece is in reference to part '24' the input shaft, this is what allows it to be pulled clear of the counter shaft and exit out the front of the case...it's normal.

I just finished a T-5 rebuild, and they have a similar architecture.
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post #14 of 60 Old 06-01-2011, 03:16 PM Thread Starter
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Thanks for the responses. I got some more photos of the splines and will post them as soon as I get home. The splines are worn but I am not sure how much is to much. I was glad to find out that the piece on the input shaft was normal. It looked like it was machined and not broken but you never know.
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post #15 of 60 Old 06-01-2011, 03:39 PM Thread Starter
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Here are some photos of the shaft splines. I tried to resize them so we will see how it works out. Let me know what you think please.
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