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  #1  
Old 06-16-2021, 10:55 AM
dano73 dano73 is offline
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Join Date: Oct 11, 2007
Location: Long Island New York
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T 18 with Model 229 Transfer Case

Will a 229 case in an 88 grand wagoneer bolt up to a T18 transmission from a 1979 cherokee chief? The chief has a model 20, with a passenger drop, and the axles are widetrack. Would like to put the T18 in the wagoneer, but dont have access toany early narrow axles. The chief needs to be the donor truck, because the metal is too nfar gone unfortunately. Any ideas?
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  #2  
Old 06-16-2021, 11:11 AM
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babywag babywag is offline
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I believe no, it won't just bolt up.
a np229 is 23 spline input
probably adapter kits available but they are never cheap.
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Old 06-16-2021, 11:16 AM
dano73 dano73 is offline
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Thanks Tony, yeah cheap is important. Lol. Just got a bunch of parts, and thought it would be cool to put the T18 in my 88. Ok, one less thing that I dont have to do!
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Old 06-16-2021, 03:40 PM
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tgreese tgreese is offline
 
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My understanding is the full-time cases are not up to the impact load of a manual transmission. That's why they are always offered with automatics, not manual.

A T-18 from a '79 Chief has the "Texas" pattern and a 6-spline tailshaft. Only compatible with some Dana 18s, Dana 20s, and a very scarce and pricey Dana 300 from a single production year of Scouts. All are passenger drop.

These T-18 transmissions, with an input shaft change, are sought-after by '79 and earlier CJ-5 owners as a swap candidate. Of course, these are all passenger drop, and can use their original 18 or 20s. Kinda think it's not much use for a drivers-drop Wagoneer, beyond selling it for some cash to finance other parts.

You could instead start with a 2WD 4-speed truck transmission. The Ford and GM transmissions (T-18, T-19, NP435, SM420, SM465) can be adapted to the Jeep T-176 bell housing on the AMC V8 with little difficulty. All of them are so short the shifter will come up under the dash, but you can heat and bend the stalk so you can reach it. Then adapt the back of the transmission to a driver-drop NP208 or NP241 part-time chain-driven transfer case.

The only bolt in combo will be from an '80-up FSJ with a manual transmission, either a Wagoneer/Cherokee/J10 with the T-17x 4-speed, or an '80-up J20 with a T-18. Both will have a driver-drop NP208 transfer case. The T-18 J20s are scarce.
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Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
ECO Green: '15 FCA Jeep Cherokee KL Trailhawk

Last edited by tgreese : 06-16-2021 at 03:51 PM.
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Old 06-17-2021, 07:35 AM
dano73 dano73 is offline
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Thanks Tim, appreciate it. I bought the 79 to part it. Just a cool drivetrain, thought it would maybe fit in my 88 waggy without too much trouble, since I had all the parts. I was thinking if I could source an earlier narrow track front axle passenger drop that would be the easier way to go. Or maybe just part it as originally planned, cause ya know how this stuff seems to find a home in the yard after a while. Lol
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  #6  
Old 06-17-2021, 10:45 AM
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tgreese tgreese is offline
 
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Quote:
Originally Posted by dano73
Thanks Tim, appreciate it. I bought the 79 to part it. Just a cool drivetrain, thought it would maybe fit in my 88 waggy without too much trouble, since I had all the parts. I was thinking if I could source an earlier narrow track front axle passenger drop that would be the easier way to go. Or maybe just part it as originally planned, cause ya know how this stuff seems to find a home in the yard after a while. Lol
The T-18 has some desirable characteristics. It's strong and durable - way under-stressed in this application. Parts are widely available. If the donor is a V8, it will bolt in and the shifter will be perfectly centered in the cabin.

On the down side, they can be a pain to row in stop-and-go traffic. They are not fast shifting. They are loud compared to an automatic or the other manuals, with an audible whine in 2nd or 3rd.

You could go passenger drop and use the original Dana 20. Your existing rear axle is centered, which will work with the 20. A passenger-drop front Dana 44 should not be too hard to locate - every Wagoneer '74-79 got one. Finding one in a matching ratio may be harder.

Good luck with whatever you choose!
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Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
ECO Green: '15 FCA Jeep Cherokee KL Trailhawk

Last edited by tgreese : 06-18-2021 at 07:28 AM.
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  #7  
Old 06-17-2021, 11:48 AM
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goldhammer goldhammer is offline
 
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Going to a passenger drop will require some trans tunnel work to get clearance, IIRC. But can source that from the donor rig and graft it in.
With the Dana 20, you lose some in low range, but with the wide ratio 18, you should break even or a little better.
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ASE Master Collision Tech
"Beast" - 81 "S" W/T, 85-360, T-18, Lock-rite,wag alloys, 31-10.50 Pro Comp MT's, Warn 8274 in a fabbed bumper/deer strainer(tested and approved)

88 XJ, 3" lift, 31-10.50's, custom bumpers and winch/tow bar mounts, Warn 9500HS, custom sliders/steps, camo paint, & headliner

Member: FSJ Prissy Restoration Assoc.
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  #8  
Old 06-17-2021, 01:29 PM
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jpcoutts jpcoutts is offline
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I've got a T18/208 combo from a later J20 I haven't used if you really want that set up.
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Correction- it just needed a water pump!
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  #9  
Old 06-17-2021, 02:45 PM
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goldhammer goldhammer is offline
 
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There you go. Had that in my big Cherk. With stock 360, 3.31's and 31-10.5's got around 12 in town and 14 on the highway at 65.. oh, and in 1st- low range at idle I could get out and walk faster.
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Art
ASE Master Collision Tech
"Beast" - 81 "S" W/T, 85-360, T-18, Lock-rite,wag alloys, 31-10.50 Pro Comp MT's, Warn 8274 in a fabbed bumper/deer strainer(tested and approved)

88 XJ, 3" lift, 31-10.50's, custom bumpers and winch/tow bar mounts, Warn 9500HS, custom sliders/steps, camo paint, & headliner

Member: FSJ Prissy Restoration Assoc.
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