T5 vs T176 Is the t5 not up to handling the 4.2Liter - JeepForum.com
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Unread 01-04-2015, 02:19 PM   #1
agear
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1984 CJ7 
 
Join Date: May 2011
Location: norfolk, virginia
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T5 vs T176 Is the t5 not up to handling the 4.2Liter

Okay, I've done my homework and went over pages of web search for questions about the t5 vs the t176. I'm planning on getting a t5 because my t176 is tight and notchy to shift and my rpms are high on the interstate. Is the t5 not up to handling the 258 ? I'm happy with the 258 right now. It's my daily driver but I also go wheeling. I just went to uwharrie national forrest 2 months ago and plan on trying pretty much anywhere my 2.5 suspension lift,4.10 gears, and 33"s will take me. My jeeps an 84. I'm aware the t5 is light duty and the t176 is medium duty and was put behind v8s. I just want to make sure the T5 can handle offroading. I've read that it can handle all the torque of the 258 but does it need to be stronger for extra strains ?? put on it from 4wheeling ? Or anything like that ? Will I be able to use overdrive with 4.10 gears. I don't want to go too fast in a cj but it would be nice to have the rpms lower on the interstate and better gas mileage.

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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.
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Unread 01-04-2015, 03:02 PM   #2
Matt1981CJ7
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How many transmission threads can one guy start?

Thousands of CJs with T5s have run fine for decades. It's certainly a step down from the T176, but it's capable.

Matt
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Unread 01-04-2015, 03:23 PM   #3
agear
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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.
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Unread 01-04-2015, 04:05 PM   #4
seabass1858
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i know of a guy with a t-4 and has 200k miles on it but its only upgrade to the jeep was 30x9.50s. Gary (Lumpygritts) drove his for 30 years and has something like 4.88s 33s, lockers and wheels at MOAB and its his original tranny also DD from what i heard. As long as your gearing is good and I think you will be fine with 4.10s and 33s.
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Unread 01-04-2015, 07:20 PM   #5
csmetreyeon
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I'm just finishing up my build on a 81 cj7 I have a 4.2l with mpfi on a t 176 with 33's and 3.54 it handles well with my setup not sluggish from starts and is turning 2500 rpm around 65-70 and 28-2900 at 80 mph it handled really well IMO.
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Unread 01-04-2015, 08:25 PM   #6
RenoF250
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My 85 had a T5 that had supposedly been just been rebuilt (it was all clean and painted and the clutch was definitely new) it rapidly went downhill not wanting to downshift into 2nd or 4th, not go into 1st, and popping out of R. My friend bought a CJ with a T5 in HS and it broke then and has been rebuilt 3 times since I believe. They are lightweight piles of crap. Get to something better like an AX-15 or an NV if you are switching trannies. Overdive is over rated, I have 4.10s and 32s and I have to make a point of using 5th. Jeeps are not for highways.
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Unread 01-04-2015, 08:31 PM   #7
only in a jeep cj
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Ive have both transmissions and have even had a 258/T-5/4:10 33s CJ that I wheeled. You might even have read some of my past post as Ive responded to this question before.

In a nutshell, I drive my CJ (a scrambler with a 258/T5/3:31 and 30s) like a stolen sports car. Really, I'm hard off the line, heavy on the gas and spin the tires on a regular basis. I drive 75/80 on the interstate and it see as much trails/rocks as it can handle. I prefer the feel of the T5 and its gearing. The T176 I had in it before was a pig first through 3rd. It did match my 272 axle well for RPMs on the interstate.

In the CJ with 33s, I hammered rocks and it was no problem. T5 held fine. Don;t hop or jump it when spinning tires....that will load up the drive train fast and can break stuff fast. Usally Ujoints, but maybe the T5.

I did break one T5 (of the many Ive had) and it was 3rd gear on the street.

The overdrive was nice and worked fine with my 410s and 33s. I use it everyday on my Scrambler.
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1975 CJ-6 304 T15 Dana20 30/44 3.73
1983 CJ-8 258 T5 300 30/44 3.31 Looking for full or half hardtop buy or trade
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Unread 01-04-2015, 10:25 PM   #8
gosupes
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3rd gear is the biggest liability for the T5. Like mentioned, don't load the trans and do silly things like dumping the clutch at every light and chances are it will hold up to moderate abuse.
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1986 CJ7, 4.2 w/4.0 head, TFI-HEI hybrid ignition, Clifford manifold w/Holley 390 w/cold air intake, OBA, 4.5" lift, Woody CV shaft and Tattons in front, 4.10 gears - lunchbox in front, Truetrac in the back, twin-sticked, blower upgrade for running topless, trying to keep it simple.

It's just a Jeep, and if you don't wheel it once in a while, it's not even that.
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Unread 01-05-2015, 10:16 AM   #9
wm69
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I have a T5 in my tan '7. Jeep hasn't been babied, but only has 80K on it, and I've always run 31's. I have a T177 in the shop to swap in whenever the T5 decides to go.

The T5 seems to hold up ok (not great, but ok) on stock or close to stock vehicles that aren't abused. Spankrjs over on the Scrambler board has one Scrambler that has a T5 that is fine. His other Scrambler is lightly modified and he went through THREE rebuilt T5's in ONE year.

If you have a T5, run it till it dies, but no way I'd swap one in in place of another transmission unless someone gave you the T5 and you did all the work yourself.
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85 CJ7 258, borla header, Team Rush, MC2100 ,optima batt, Warn 8274, agr super box 2 & pump, T5 w/ B&M shifter, centerforce 2, superior 1 piece axles, warn hubs 2.5 in lift, 31" BFG MT

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Unread 01-05-2015, 04:27 PM   #10
GTNMUDY
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Quote:
Originally Posted by csmetreyeon View Post
I'm just finishing up my build on a 81 cj7 I have a 4.2l with mpfi on a t 176 with 33's and 3.54 it handles well with my setup not sluggish from starts and is turning 2500 rpm around 65-70 and 28-2900 at 80 mph it handled really well IMO.
Got the same setup with a 355 SBC.

225K on the tranny and only 1 rebuild (bearings only)

T-176 is a good tranny
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Unread 01-05-2015, 07:55 PM   #11
csmetreyeon
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Quote:
Originally Posted by GTNMUDY View Post
Got the same setup with a 355 SBC.

225K on the tranny and only 1 rebuild (bearings only)

T-176 is a good tranny
Yeah I rebuilt mine before I reassembled the Jeep "some idiot thought the top end was fine and this weekend will be rebuilding the shift rails with new springs and popits"
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