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what transfer case for a sm465?

8K views 12 replies 9 participants last post by  MAD MAC 
#1 ·
I recently purchased a 2wd sm465 tranny out of a 77 chevy one ton truck. I plan on puting this in my YJ behind a 350, my problems comes up when I try to find a transfer case that is driverside drop and has a fixed yolk that i can bolt up to this tranny without a exspensive adaptor. I already know that I have to change the mainshaft in the tranny so I guess I am just looking for a transfer case that bolts directly up to a chevy with a fix rear yolk and driverside drop. And I am looking to go the junkyard route over buying anything new, any options?
 
#4 ·
RickB has one for sale. Drop him a line. He's on this board allot.
 
#5 ·
How about an NP241 out of an '88+ Chevy truck. I'm not 100% sure they used the SM465 in '88+ Chevys, but they might have. I have an '85 Chevy with an SM465 and NP 208 in it. The Chevy 208 front output is on the wrong side for your Wrangler, but you might be able to bolt up a Ford 208. The splines may not match, but you could probably swap the Chevy 208 input shaft into the Ford case. Not sure if any of this is possible, but that would be the direction I would start in. Maybe someone will know if this will work.
 
#8 ·
A chevy 241 would have an input spline if 27 or 32 so does anyone know what the 208 might be or what output spline the 456 will be. 10 like a 420?
 
#11 ·
agro4 said:
maybe I am just stupid but could anyone try and explain how the divorced unit works , or just refer me to a website that tells about it?
Divorced means that it mounts seperately behind the tranny and is connected by a short driveshaft. The good thing is you can put it behind any 2wd tranny without using any adapters. Unfortunately it takes up a lot of room and probably isn't a good option unless you have a lot of wheelbase.
 
#12 ·
Forget about using a divorced t.case in a YJ. Just not enough rr driveshaft length.
Here's some t.case info:

Transfer Cases:
NP203: Full time, chain driven, steel housing, 2:1 low. Big, heavy.
Big 3 used it until about '79. Both left and right drop [Conversion to part time kit available]
used in:
'73-79 Blazer/Jimmy/P.U w/ V8 and autos
'74-79 Dodge Power Wag/Ramcharger
'74-76 Ford F100 w/V8 and auto
'77-79 Ford F150,F250, '78-79 Bronco (optional)

NP205: Part time, gear driven, iron housing, 1.96:1 low.
Big 3 used it. Both left and right drop. Very heavy, very strong.
used in:
'69-73 Blazer/Jimmy with auto
'73-74 Jimmy with auto (opt)
'70-73 GMC P.U/ Suburban w/ manual trans
'81-87 Chevy and GMC K3500 P.U
'69-74 Dodge Power Wag
'80-93 Dodge Power Wag, W200, W250 crew cab, W300
'76-79 Ford F150, F250, '78-79 Bronco.
NP208: Part time, chain driven, aluminum case, less stout than above, 2.61:1 low
used in:
'80-91 Blazer/Jimmy
'81-87 GM K1500, K2500, K3500 (optional) P.U.
'80-93 Dodge Power Wag, W150, W250 (except crew cab)
'80-85 Ramcharger
'80-86 Ford F150, F250 (except H.D.), Bronco
'82-84 Jeep P.U. except J10,
'85-87 Jeep J10/J20 P.U. w/auto
'80-83 Jeep Cherokee/Wag
NP231: "Command Trac", Part time, chain driven, aluminum case, 2.72:1 low, weaker yet than above. A weak 3 pinion planetary gear/ 1 inch chain. No true neutral for flat towing.
Most desireable version is the NP231D found in Dodge 1/2 ton trks. [larger chain/hub/sleeve] Short shaft kit needed because of the 9.25" tail shaft.
used in:
'89-present, S-trucks, Blazer/Jimmy
'87-present Dodge Dakotas
'93-present Dodge Ram 1/2 ton
'87-present Jeep Wrangler
'87-present Jeep Cherokee and some Grands
NP242: "Select Trac", Part time/full time, chain driven, aluminum case, 2.72:1 low, similar to the NP231 except for extra full time setting.
used in:
'88-present Jeep Cherokee (optional)
'93-present Jeep Grand Chero (without quadra trac or command trac)
NP241: Part time, chain driven, aluminum case. Stronger than the NP208. 2.72:1 low
replaced 208 in late '80's Dodges and
'88-present Chevy P.U./ Sub.
Dana18: Part time, steel housing, gear driven. Compact. Gears spin all the time. rr output offset. 3 versions of intermediate shaft: 3/4"/1-1/8"/1-1/4". Noisy. 2.46:1 low.
used in:
'45-71 Jeep CJ and
'47-65 Jeep P.U. /wag
'61-66 Scout
Dana20: Part time, steel housing, gear driven, 2.03:1 low. Straight through design. Flat tow, O.K.
used in:
'66-77 Ford Bronco (driver side drop)
'72-79 Jeep CJ, except Quadra Trac (pass side drop)
'63-64 Jeep Chero/ Wags w/ manual trans
'67-73 Jeepster/Commando
'67-79 Scout and Scout II (pass side drop)
Dana300: Part time, steel case, gear driven, 2.61:1 low. Straight through design. All helical cut gears-quieter. No flat tow without modifications. Weak-tailhousing output.
used in:
'80-86 Jeep CJ
'80 Scout II ( w/ 'Texas' bolt pattern case, same as D20)
Warner Gear 13-45: 2.74:1 low
used in:
'86 Ford F250HD, F350
Warner Gear 13-56: 2.69:1 low
used in:
'87- 93 (present?) Ford F250/350
regards, as always, jefe
 
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