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Unread 01-05-2010, 06:41 PM   #1
Stroudcreek
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1986 CJ7 
 
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5 speed in a CJ?

I am running 4.88 and 35's, in an 86 CJ7 with a T176. I have a 8.8 rear and a 44 front but I sure would like to have a 5th gear for the road. What would be a good 5 speed and has anyone put one in?

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Unread 01-05-2010, 06:57 PM   #2
scottymac62
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Here's your puppy..........If you want to go 5 speed...go with this one..

The NV4500 Transmission - Novak Conversions
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Unread 01-05-2010, 06:59 PM   #3
Area.3.Fiftyone
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^^^ Just be prepared to open your wallet really wide.^^^
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Unread 01-05-2010, 07:03 PM   #4
scottymac62
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Quote:
Originally Posted by IronMaiden View Post
^^^ Just be prepared to open your wallet really wide.^^^
Oh yea...I forgot to mention that!
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'77 CJ-5 Renegade 304 / T-150, Dana 20, 30/20 axles, Aussie Locker in the Dana 30, American Racing 15x10 Outlaw II's, 33" Dynapro M/T's" ,Optima Battery, TeamRushed + Summit Racing CDI ignition, FlowKooler water pump, Edelbrock Performer Intake Manifold, Holley 4160 390cfm, Herculiner, Silver Ceramic Coated Hedman Hedders, Flowmaster 40's.
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Unread 01-05-2010, 07:11 PM   #5
foggybottombob
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I don't think you want an NV4500 unless you have a V8. For a 6 cyl I would suggest the NV3550 but it probably would not cost much less for all the adapters. I have a T5 in my CJ which everybody hates but I have not torn it up yet.
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Unread 01-05-2010, 07:30 PM   #6
gojeepin
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Quote:
Originally Posted by foggybottombob View Post
...I have a T5 in my CJ which everybody hates but I have not torn it up yet.
Agree on the T5 being a good transmission for you. With 4.88s, you've transferred the stress of the driveline to the axle shafts... had you been running 2.73s,the greatest stress would be on the transmission, transfer case, and driveshafts.
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Unread 01-05-2010, 08:01 PM   #7
CJhollic
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x3 on the T5. I have put a lot of miles on it with no problems. Like a previous poster said, it seems like everyone hates them, but mine keeps humming along.
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Unread 01-05-2010, 10:38 PM   #8
86cjjeeper
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X4 on the T5. over 117,000 on mine and still going strong. people hate them, and they're claimed to be weak, but if you dont go romping on the skinny pedal everywhere you go, then i dont see it being a problem with 4.88's. although i run 4.56's and the skinny pedal is held to the floor multiple times during any trailride(running an '86 with a 258). the ability of being able to shift quickly if needed has gotten me out of some pretty sticky and offcamber situations. drive it right and a T5 should last. and if it doesnt, they are pretty cheap and simple to rebuild.
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Unread 01-06-2010, 12:22 AM   #9
only in a jeep cj
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X5 on the T-5. I prefer them as I like they way they feel when shifting and the way the shifter springs back to center. Easy to find the gears and the overall gearing matches my driving style. I really need a 5th gear for interstate travel as my stockish CJ-7 sees higher speeds. I also picked up an AX-15 for a future project....we'll see.
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1975 CJ-6 304 T15 Dana20 30/44 3.73
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Unread 01-06-2010, 10:56 AM   #10
trailhead2004
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X6 on the T5. I have one and love it. BTW, running 4.10 diffs. You may also want to look into the B&M short throw shifter. It really tightens the pattern up a lot.

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Unread 01-06-2010, 12:57 PM   #11
foggybottombob
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Just FYI, the T5 comes in two versions. One has a 0.86 5th gear and the other has a 0.76 5th gear. That is a significant difference when it comes to chosing gear ratios.
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Unread 01-06-2010, 01:45 PM   #12
trailridin4x4x4
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i have a t5 behind a 4.0 mpi in a 81 cj7 w/4:56 gears and 35's it's perfect and i'm not worried about blowing it up 4.0's are torquey but not really enough to grande a t5
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Unread 01-06-2010, 05:10 PM   #13
carldimery
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why dont you consider the ax-15. This is a great tranny and it has an overdrive.You can find these very cheap, they are much stronger than the t-5, and it only cost $100 to adapt them to a dana 300.
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Unread 01-06-2010, 05:16 PM   #14
foggybottombob
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I've read a lot of "I rebuilt my AX-15 and it went out the next week" stories. I have no experience with them but a lot of people say the synchros quit on them a lot. I've run my T5 for several years with no problems and I bought it used from a junkyard.
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Unread 01-07-2010, 08:43 AM   #15
Happy Joe
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T-5s work and work well if applied and driven properly.
That said they were originally designed with a 100,000 mile life and most (survivors) are now well past their prime (probably need a rebuild). It should be noted that there are many different strengths and flavors of T-5 the one behind the jeep 6 was one of the stronger early ones (before the "world class"). The ones behind 4 cylinders were not as strong (break pretty easily) as they were designed for very low torque applications.
These trannies are well matched to low torque applications (6-cylinders of the 258 and 4.0 liter flavors) and short stroke (in the 3" range) v-8s if not abused. They do not typically work well for the younger drivers or behind medium torque engines (v-8s in the 350 cubic inch range, and higher).

I like mine it was abused nearly to death then pulled from a fellow Jeeper's garage many years ago (definitely needs a rebuild).

Recently though I have been looking at the NV-3550s.

I have a spare T-5 though and it has occurred to me that the long tail shaft might be replaced with a range doubler (low range gears from a NP-207) giving a low torque 6 or 8 speed (some gears would be too close together to count) with a first gear that would be lower than 10:1 (some machine work would be involved; I need to heat the shop, pull apart a 207 to measure its innards, get some milling machine tooling, and replace the motor on my lathe, first). (Back burner/someday project).

Enjoy!
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