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Old 07-28-2017, 07:26 PM   #1
D13
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Length of SM465 and Tcase adapter?

I looked and 'think' I found the answer but wanted to check with people who know. I'm trying to find the length of an SM465 and its T-case adapter, preferably to an NP208C in a square body. Trying to figure out if my A833, out of I think an 1982 K10, 32 spline output to an NP208C, will swap for a 465 with similar output, without getting into drive shafts etc. Neither of us have the 465/208 combo to measure.

What I've come up with is the 465 plus adapter is 19 1/2". Measuring my A833 plus adapter I get 20 1/2". My assumption is that both bell housings are the same length, as my A833 bell is double drilled for both types of trans patterns. Looking at it the another way, the A833 is 26 3/4" engine face to t-case face, and 24 1/2" engine face to trans mount center line.

So is seems the tcase would sit 1" further rearward, needing new holes but the shafts might work. But it seems odd that this GM spec set up would be different length than the 465 combo.



Anyone got the 465 combo laying around they can measure?
Thanks!
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1987 2 ton
1982 250/TH350 beater in progress
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77 1/2 ton 250, 3OTT, and hokey aftermarket AC
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Old 08-04-2017, 06:27 AM   #2
D13
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Re: Length of SM465 and Tcase adapter?

Come on now, don't be shy. No one has one of these sitting on the floor?

LOL.

Seriously, need to find this out before I decide what to do with this thing.
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1987 C10 6.2 oil burner
1987 2 ton
1982 250/TH350 beater in progress
Dad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrapping
77 1/2 ton 250, 3OTT, and hokey aftermarket AC
Plus a mess o' tractors
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Old 08-30-2017, 06:05 AM   #3
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Re: Length of SM465 and Tcase adapter?

Anyone? Just looking for a tape measure length on the units.
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1987 C10 6.2 oil burner
1987 2 ton
1982 250/TH350 beater in progress
Dad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrapping
77 1/2 ton 250, 3OTT, and hokey aftermarket AC
Plus a mess o' tractors
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Old 08-30-2017, 11:24 AM   #4
B. W.
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Re: Length of SM465 and Tcase adapter?

SM465 - 12"

adapter for NP205 - 7"

sorry, no 208
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Old 08-30-2017, 04:58 PM   #5
mongocanfly
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Re: Length of SM465 and Tcase adapter?

found this on the 208...
NP208 (pictured) / 209 / 228 / 229Manufacturer: New Process GearNumber of speeds: TwoHigh: 1:1Low: 2.69:1Case (or housing) material: AluminumFront output drive type: Chain (driver and passenger side drop)Availability or aftermarket parts and support: LowInput spline count: 23, 27, 31 or 32Rear yoke: Fixed or SlipPlanetary gear: Yes (six-pinion)Available U-joint sizes for yokes: 1310, 1330Flange or slip yoke eliminator available: YesShifter type: MechanicalWeight: ~79 poundsLength: ~18 inches (mount face-to-yoke center)Commonly found in: '80s fullsize Jeep Cherokee & fullsize domestic truck
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Old 08-30-2017, 05:01 PM   #6
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Re: Length of SM465 and Tcase adapter?

and this on the sm465
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Old 08-30-2017, 05:07 PM   #7
mongocanfly
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Re: Length of SM465 and Tcase adapter?

and this on the trans and adapter...
.The SM465 is 12 long with an adapter housing of 7.250. The transmission and transfer case adapter length is approximately19-1/4. The overall length of the adapter kit is approximately 1 longer than the stock; therefore, driveline modifications may benecessary. The overall assembled length including the bellhousing is 26.250"
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Old 08-30-2017, 06:37 PM   #8
franken
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Re: Length of SM465 and Tcase adapter?

I crawled under the truck and measured. I got ~21" maybe a hair less for the trans and adaptor. Its about an 85 465/208 round pattern, which should make it a 32 spline. Its in a 72 truck so I can't be exact on the year...
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Old 08-30-2017, 08:37 PM   #9
OldCreek
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Re: Length of SM465 and Tcase adapter?

A straight line from right edge of the bell housing face to right side end of adapter is 27 1/8" on my '84 k10. (SM465 to np208 with long foot adapter). I figure if I measured square from the bell housing it would be somewhere less than that...maybe 26 3/4?

Wil
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