Jeep CJ7 T176 or T5 - JeepForum.com
 2Likes
Reply
 
LinkBack Thread Tools
post #1 of 16 Old 12-04-2019, 08:45 PM Thread Starter
beanerchorizo
Registered User
1984 CJ7 
 
Join Date: Oct 2015
Location: San Diego
Posts: 6
Garage
Jeep CJ7 T176 or T5

I have an '84 CJ7 with a freshly*rebuilt 4.2, Yukon Axles, 4.56 gears , 35 inch tires, and a 4inch lift. I busted my T5 last month. Should I put a T176 or T5 in it? All other trans are out of my budget. I only drive it on the highway to get to my off road destinations so about twice a month.*


v/r

Beaner
beanerchorizo is offline  
Sponsored Links
Advertisement
 
post #2 of 16 Old 12-04-2019, 08:50 PM
littleblackjeep
Registered User
1995 YJ Wrangler 
 
Join Date: Apr 2011
Location: Spring Creek
Posts: 296
T176 is a drop in replacement and a stronger transmission.


Sent from my iPhone using Tapatalk

'95 YJ
GM 350, SM420, NP231 SYE, Fnt. D60 SOA 4.10, Rr. D60 SOA 4.10 Detroit Locker, Fnt.Sus. N/A. Rr.Sus. XJ Springs, RuffStuff Wayback.
YJ Build: https://www.jeepforum.com/forum/f22/my-girlfriend-1327158/
littleblackjeep is offline  
post #3 of 16 Old 12-04-2019, 08:55 PM
walkerhoundvm
Registered User
 
walkerhoundvm's Avatar
1981 CJ8 
 
Join Date: Apr 2010
Location: The Big Cholla
Posts: 3,758
I second the t176. It's pretty hardy, and easy to rebuild on top of that.
walkerhoundvm is offline  
 
post #4 of 16 Old 12-04-2019, 09:42 PM
BagusJeep
Web Wheeler
 
BagusJeep's Avatar
1981 CJ7 
 
Join Date: Jul 2009
Location: Bali
Posts: 7,246
T176 all the way. It is a much stronger but shorter transmission. It is rated medium duty but lots of us run them for decades without failure. A T5 is along car transmission and is prone to internal stresses when you use it off road, flexing puts a lot of stress in there. T5 are known to be destroyed by such use and it looks like you have built a serious rig.

OK, you would lose the overdrive 5th gear. A T176 has first gear of 3.52:1, a T5 4.03:1 so there is a slight edge for a T5 with a lower crawl speed. The gears and axle ratios look well matched to your 35" tyres but it is unlikely with all that rolling mass that the overdrive would have been useful on highway and, as you say, you only use it on highway occassionaly. What is your comfortable top speed, 60mph?

It is not a direct replacement, you will need to change the driveshafts, gaiter, transmission cover as well. However it will fit on to the clutch / engine / transfer case (dana 300) so all the expensive areas are direct fit.

You may want to measure your driveshaft angles and decide now if you want to go to the expense of a double cardan shaft in the rear (if you do, changes are needed to the rear axle spring perches so you can rotate the axle) or can make do with the original style. Tom Woods is a good source for info on this.
keith460 likes this.

BagusJeep lives in Bali.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
BagusJeep is offline  
post #5 of 16 Old 12-04-2019, 10:27 PM
caseypotts
Registered User
 
caseypotts's Avatar
1980 CJ7 
 
Join Date: Nov 2003
Location: Prescott
Posts: 586
T19, T18, T176. If it were me.
caseypotts is offline  
post #6 of 16 Old 12-05-2019, 03:16 AM
80cj
Web Wheeler
 
80cj's Avatar
1980 CJ5 
 
Join Date: May 2002
Location: Hawaii
Posts: 7,815
T-177 with 3.82 first gear.
80cj is offline  
post #7 of 16 Old 12-05-2019, 08:46 AM
NormWild
Registered User
1985 CJ7 
 
Join Date: Sep 2017
Location: Lehigh Valley
Posts: 292
T176 and 4.56 gears on the highway will be cranking pretty hard. As long as you are OK with the lack of overdrive, the 176 is a better trans. I purposely stayed with 4.10s in case my T5 ever blows up, so I could swap out to T176.

1985 CJ7- Too many mods to list due to stupid 100 character sig restriction
NormWild is offline  
post #8 of 16 Old 12-05-2019, 12:25 PM
80cj
Web Wheeler
 
80cj's Avatar
1980 CJ5 
 
Join Date: May 2002
Location: Hawaii
Posts: 7,815
T-176 and T-177 are the same basic trans but T-177 has the lower 3.82 first gear which would be better if you ran 4.10's. Most CJ's 81 and later actually have T-177's. Look for the tag number 5359389.
Attached Images
 
Nucking1Futs likes this.
80cj is offline  
post #9 of 16 Old 12-05-2019, 12:42 PM
only in a jeep cj
Registered User
1986 CJ7 
 
Join Date: Jun 2001
Location: Mobile
Posts: 6,069
I’m glad you chimed I’m with that ^^
Everyone calls those units 176s when it has been my experience that most all the later CJs used the 177
I have like 5 of them sitting on the shelf and all are 177s.
If the tag ends in a 90, it’s a 176. If it ends in a 89, it’s a 177.
If the tag is missing and the trans is out of the jeep, you can put it in first gear and watch the output shaft for one rotation while you count the input turns.
I drove one for a while in my Scrambler and like the feel and shifting of the T5 way more. The Tremic just feels like a truck transmission. I’ve driven several others as well. The T5 still has long throws and not as car like as some suggest.
I’ve pounded trail Jeeps on the rocks before and don’t destroy the T5. Gear ratio to tire size is key to making them survive.
My second favorite trans would be a swap to the NV3550 as it’s stronger but geared just like the T5. Then the AX15 would be good. Both would require a clocking ring at the tcase.

Ed
1975 CJ-6 1983 CJ-8
1986 CJ-7 Laredo 1986 TJ-7 Trail Jeep
2003 Inca Gold TJ Rubicon
only in a jeep cj is offline  
post #10 of 16 Old 12-05-2019, 02:07 PM
agear
Registered User
1984 CJ7 
 
Join Date: May 2011
Location: norfolk
Posts: 3,242
I agree with above your rpms would be high on the interstate with the 4.56s and 35s. I ran 4.10s and 33s and the t176 and I didnt like having my rpms that high. I just dont know if the 35s will cause problems with the t5. I dont think the t5 is as bad as some people say . If I'm not mistaken they used the same platform for the World class t5 versions they put behind 5.0 mustangs

1984 jeep cj7, 258 I6, rebuilt T176,rebuilt Dana 300, amc 20 , dana 30, 4.10's Trac-lok in rear , 4.10's detroit soft locker in dana 30, 2.5 inch bds suspension lift, 1 inch polyurethan body mount lift. Line ex. weber carburetor. factory tach. factory clock ,oem replacement speedomter cluster, and oil pressure gauge, factory volt gauge.
agear is offline  
post #11 of 16 Old 12-05-2019, 04:40 PM
80cj
Web Wheeler
 
80cj's Avatar
1980 CJ5 
 
Join Date: May 2002
Location: Hawaii
Posts: 7,815
To determine first gear ratio by counting revolutions, put it on first gear, not fourth. I imagine that was a typo. I’ve seen T5’s broken in a stock setup with stock tires. I know people who have luck running T5’s with 35’s but I had a chance to compare a T-177 and a T5 with the shifter covers off side by side and I definitely would feel better running a T-176/177.
80cj is offline  
post #12 of 16 Old 12-05-2019, 05:05 PM
only in a jeep cj
Registered User
1986 CJ7 
 
Join Date: Jun 2001
Location: Mobile
Posts: 6,069
Yep, brain fart. ^^I was thinking of it being a 4 speed I guess. I’ll correct it.
I use a paint pen and put a dot at the 12 o’clock position of each shaft or top spline.
Turn the shaft and count watching the output for just 1 full rotation. After 3 full turns, if it stops at the 6 o’clock position it’s a 176 and almost 10 o’clock, it’s a 177.

Ed
1975 CJ-6 1983 CJ-8
1986 CJ-7 Laredo 1986 TJ-7 Trail Jeep
2003 Inca Gold TJ Rubicon
only in a jeep cj is offline  
post #13 of 16 Old 12-05-2019, 05:05 PM
agear
Registered User
1984 CJ7 
 
Join Date: May 2011
Location: norfolk
Posts: 3,242
Quote:
Originally Posted by 80cj View Post
To determine first gear ratio by counting revolutions, put it on first gear, not fourth. I imagine that was a typo. I’ve seen T5’s broken in a stock setup with stock tires. I know people who have luck running T5’s with 35’s but I had a chance to compare a T-177 and a T5 with the shifter covers off side by side and I definitely would feel better running a T-176/177.
Oh ok. Just those highway rpms. I didnt like running that high of rpm

1984 jeep cj7, 258 I6, rebuilt T176,rebuilt Dana 300, amc 20 , dana 30, 4.10's Trac-lok in rear , 4.10's detroit soft locker in dana 30, 2.5 inch bds suspension lift, 1 inch polyurethan body mount lift. Line ex. weber carburetor. factory tach. factory clock ,oem replacement speedomter cluster, and oil pressure gauge, factory volt gauge.
agear is offline  
post #14 of 16 Old 12-05-2019, 07:47 PM
cpadget
Registered User
 
cpadget's Avatar
1983 CJ7 
 
Join Date: Feb 2018
Location: Goodyear
Posts: 157
T-5, 33’s, 4.88’s, 165K miles, no issues. Exploded the T-5, self induced and not paying attention. Rebuilt the T-5, moved to 35’s, same 4.88’s, good use of overdrive with the setup, and don’t foresee any issues. Wheeled all over SoCal during its life...for what it’s worth. Only 1,000 miles on the rebuilt thus far
cpadget is offline  
post #15 of 16 Old 12-09-2019, 11:27 PM
Nucking1Futs
Registered User
 
Nucking1Futs's Avatar
1984 CJ7 
 
Join Date: Oct 2015
Location: Sacramento area
Posts: 132
Quote:
Originally Posted by beanerchorizo View Post
I have an '84 CJ7 with a freshly*rebuilt 4.2, Yukon Axles, 4.56 gears , 35 inch tires, and a 4inch lift. I busted my T5 last month. Should I put a T176 or T5 in it? All other trans are out of my budget. I only drive it on the highway to get to my off road destinations so about twice a month.*
How far do you drive? With 4.56 gears. 35" tires (34.5" most likely) at a 1:1 final ratio of the T176/177 the rpm will be around 2442 rpm at 55 mph. If you had 4.10 gears it would drop rpm down to ~2200 rpm. Food for thought.....

What kind of off road adventures do you do? How remote are you when doing said activity? Do you need a lower first gear ratio? (Questions for yourself not to answer).
The T5 can be a reliable option if you play nice with it. As you've found the T5 has its limitations. Yes the T176/177 are superior in strength compared to the T5, but your gearing is set up for the T5. So there is that too.
Furthermore, what were you doing to destroy the T5? If you rebuild the T5, would/could that happen again?

I think you need to determine what your intended use is now, what the use will be, what transmissions will work within your given parameters, and then what works with you budget. If you failed to plan, then you're planned to fail. Figure out where you need/want to be with a build. Then you can plan a path. Maybe a NVG3550/AX15 would suit you better than the T17X varieties. Maybe a T18/NP435/SM420/SM465 would be in order. Switching from a T5 to anything else is going to cost you money. New bellhousing for the Ford pattern, of modify the T5 for the GM trannies. New bellhousing for the 3550/AX15. Deals are out there if you are patient.

Also, if you need lower gearing, the Dana 20 and Dana 300 have 4:1 kits available, so more food for thought.

If you can be patient, I would urge you to not be in a hurry. Remember:
Buy Once Cry Once,
Buy Twice Cry Twice.

O\IIII/O
[]-o-[]
Nucking1Futs is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome