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Is this a typo mistake or it’s possible?

HUMMER H1

Well-known member
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California
I have a hummer and humvee toy collection with some old school hummer factory advertisement material,

I noticed they said 3 speed transmission for 1993 model year and that is correct
But it also says 242 transfer case,

i thought 242 can only be bolted to 4L 80eIMG_7645.jpegIMG_7641.jpegIMG_7640.jpegIMG_7643.jpegIMG_7644.jpeg
 

Gastrap

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My 3 speed 1097R1 has a 242 case made in '05 when it was refurbished. My truck started out as a '93 M998, so probably a 218 back then.
 

Mogman

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So how did they bolt 242 to 3 speed ?
Splines of the 3 speed are different I think
No the -80 transmissions have the same output splines (including the 6L80), you can put a 242 behind the 3L80, in fact I think all A1s and R1s have 242s there is a different output shaft (TC output shaft) on the 242s they used behind the 4L80
IIRC they never put a 4L80 behind the 6.2L but I could be wrong.
Again IIRC only the basic had the 218
 
Last edited:

HUMMER H1

Well-known member
199
696
93
Location
California
No the -80 transmissions have the same output splines (including the 6L80), you can put a 242 behind the 3L80, in fact I think all A1s and R1s have 242s there is a different output shaft (TC output shaft) on the 242s they used behind the 4L80
IIRC they never put a 4L80 behind the 6.2L but I could be wrong.
Again IIRC only the basic had the 218
Is 242 a better transfer case ?
 

MarkM

CODE BROWN...It's all going to sh~t !
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My 91 M998 refit in 2008 has a GM 6.5 NA , Three speed and the NP 242.

Mark
 

Bulldogger

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Pretty sure my old 1987 6.2/3L80 drivetrain had a NP242. I thought it was original, given the age and lack of upgrades my National Guard truck had (or didn't have).
BDGR
 

Retiredwarhorses

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Hummer H1 92-93 used the 3L80e with 242 Tcase, essentially was an M998A1.
85-93 used 218 Tcase….when the 218 was mfg discontinue, a “57k” kit was developed so when a
218 was to be replaced, you ordered the “kit” that also had the new front and rear driveshafts, rear diff yoke, Tcase lock
lamp harness kit etc….
 
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