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Unread 10-20-2011, 10:53 AM   #1
Mike78cj7
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Thought I had a T176

I bought what i thought was a t176. After some reading on here i checked the serial number and it ends in 89 which means its a t177. I also checked the first gear ration and its 3.82:1. Did jeep put these in cjs? All the info i've found on them says they were in fullsize jeeps only. It has the correct input shaft and factory adapter to a dana 300.

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Unread 10-20-2011, 11:42 AM   #2
Matt1981CJ7
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According to Novak....

"The T177 and T178 are the J Series versions of this transmission as supplied with the 258 I6, and they feature significantly longer input shafts (than the T177) and bellhousing spacers to compensate for the deeper bulkheads of the FSJ Jeeps. The gearing differs as well. References to the T176 are largely similar to the other two versions. Failures of the T17x are more common in the Jeep trucks as they had greater weight and duty demands."

Are you sure it has the correct input shaft? Perhaps it's already been modified for your application.

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Unread 10-20-2011, 11:44 AM   #3
John Strenk
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Seem many people have found T-177 in thier CJ.

I wanted a T176 and was pleasantly surprised it was a t-177 and bolted right in place..
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Unread 10-20-2011, 12:29 PM   #4
Mike78cj7
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Yes im sure its the right input it measures the same as the t150 it replacing I just need to get a clutch plate for a t176. The one I had was ten spline 1 1/16. I need ten spline 1 1/8.
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Unread 10-20-2011, 12:32 PM   #5
Mike78cj7
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It could have been modified I bought it and 86 axles that came from the same jeep, at least that's what I was told. Maybe amc ran out of 176's and started using left over 177's.
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Unread 10-20-2011, 01:01 PM   #6
80cj
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Yes, CJ's used a short input shaft version of the T-177 I have one sitting in my storage shed that I got from a wrecked 81 CJ-5. I know of other T-177's that have come out of CJ's also. Novak and a few other web sites need to update their information. It makes sense that as AMC went to lower (numerical) rearend ratios to improve gas mileage in the 80s, that they would offset it by going to transmission with a lower first gear (T-177).
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Unread 10-20-2011, 03:17 PM   #7
Mike78cj7
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Thanks 80cj. I thought maybe they used them behind four bangers to help get it going. When you think about it swaping a 3.52 1st gear for a 3.82 1st gear isn't worth the time or money for parts. Either way I'm happy with the surprise of a lower first gear.
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Unread 10-20-2011, 08:58 PM   #8
80cj
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As I understand, there are a few Iron Duke 4 banger Jeeps that came with the T-176/177's. Find a bell housing from one of those and you can swap in a Chevy V-8 without and adapter.

As far as turning a T-176 into a T-177, yes it's very expensive proposition because it involves replacing several gears including the countershaft cluster gear.
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Unread 10-20-2011, 09:01 PM   #9
MoC
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Quote:
Originally Posted by 80cj View Post
As I understand, there are a few Iron Duke 4 banger Jeeps that came with the T-176/177's. Find a bell housing from one of those and you can swap in a Chevy V-8 without and adapter.

As far as turning a T-176 into a T-177, yes it's very expensive proposition because it involves replacing several gears including the countershaft cluster gear.
I was thinking about that a few weeks ago. Was wondering if you just had to change 1st or if there was more to it.
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Unread 10-20-2011, 09:11 PM   #10
80cj
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Quote:
Originally Posted by MoC View Post
I was thinking about that a few weeks ago. Was wondering if you just had to change 1st or if there was more to it.
I believe you need to change the input shaft/gear, cluster gear, 2nd and 3rd gears. Everything else is the same as a T-176.
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