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02-05-2018, 08:27 PM
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#1 |
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Registered User
Join Date: Mar 2014
Location: Mt Dora FL
Posts: 68
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are 2wd sm465 trans junk?
Swapped the SM465 out of my 2WD 87 for a M20. Had it on craiglist a few times and only got 1 call but he was only interested in one for a 4WD. Is there a market for these things? Or should I just junk it? Its in the way in the garage and needs to go.
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02-05-2018, 09:12 PM
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#2 |
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Registered User
Join Date: Mar 2015
Location: South of Pittsburgh
Posts: 428
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Re: are 2wd sm465 trans junk?
They certainly arent junk, but there are just so many of them out there. Plus they take a lot of abuse and last forever.
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02-05-2018, 11:36 PM
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#3 |
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Post Whore
  
Join Date: May 2015
Location: Alabama
Posts: 14,628
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Re: are 2wd sm465 trans junk?
^^^^what he said^^^^......not a real high demand ..good for pulling stumps and lasting forever...
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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02-06-2018, 12:47 PM
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#4 |
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Registered User
Join Date: Jan 2009
Location: Arkansas
Posts: 679
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Re: are 2wd sm465 trans junk?
I thought the SM465 and M20 in a truck were the same transmission.....
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02-06-2018, 02:01 PM
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#5 |
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Registered User
Join Date: Mar 2015
Location: South of Pittsburgh
Posts: 428
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Re: are 2wd sm465 trans junk?
no, the 465 is a 4 speed, but with a granny geay- Low, 1, ,2 ,3
the M20- I assume OP is talking about a Muncie m20 car transmission. never offered in trucks factory, but gives you a true 4 speed, no granny gear before the square bodys, GM used the SM420, which is essentially the same as the 465 |
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02-06-2018, 05:38 PM
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#6 |
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Registered User
Join Date: Jan 2009
Location: Arkansas
Posts: 679
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Re: are 2wd sm465 trans junk?
From what I read, M20 is the RP0, not the transmission name.
M20 is for a 117mm 6.55 1st gear 4 speed... sounds like a 465 to me. I have an SM465 in my 83GMC (non synchronized Low gear). I'll have to look at the RP0 label and see what it says. |
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02-06-2018, 05:45 PM
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#7 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,287
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Re: are 2wd sm465 trans junk?
if you were closer id take it its always nice to have a spare
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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02-06-2018, 05:46 PM
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#8 |
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Registered User
Join Date: Jan 2009
Location: Arkansas
Posts: 679
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Re: are 2wd sm465 trans junk?
M17 : Transmission, man 4 spd, muncie, 76mm, 3.31 1st
m20 : Transmission, man 4 spd, 117mm, 6.55 1st m21 : Transmission, man 4 spd, 82mm, 2.43 1st m22 : 4 speed h.d. Transmission (muncie) m26 : Transmission, man 4 spd, muncie, 76mm, 3.50 1st |
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02-06-2018, 08:26 PM
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#9 |
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driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,717
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Re: are 2wd sm465 trans junk?
sm465 shifts slower then Rv's do the 1/4mile and only offers 3 usable speeds...nobody wants those for 2wd. I did the same as you, put a M20 in [a real muncie M20, not the RPO code] and gave my SM away.
__________________
-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me. |
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02-06-2018, 08:48 PM
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#10 |
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Registered User
Join Date: Mar 2014
Location: Mt Dora FL
Posts: 68
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Re: are 2wd sm465 trans junk?
Yes, I meant to say a Muncie M-20, not the RPO code.
Would be a shame to junk it. I have the complete setup from bell housing to driveshaft. Even has a new-in-the-box Luk slave cylinder I will throw in if somebody is interested. I am looking for a 10 or 12 bolt truck rear if somebody wants to trade. Its not a bad trans, its just bad for what I wanted it to do, lol. |
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02-07-2018, 01:46 AM
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#11 |
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Registered User
Join Date: May 2017
Location: TX <--> MI
Posts: 279
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Re: are 2wd sm465 trans junk?
The off-road crowd loves them. They are strong and have a lower gear ratio. They can be converted to 4wd by changing the main shaft or by using an adapter kit. It would probably be cheaper for someone to just buy a 4wd one, but maybe someone will come along and be interested in yours, either for a 2wd or if they plan on converting it. I wouldn't junk it.
__________________
1978 GMC K25 1984 Chevy Scottsdale K10 built 350 4"lift - SOLD |
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02-07-2018, 03:47 AM
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#12 |
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Registered User
Join Date: Feb 2014
Location: Pocahontas Arkansas
Posts: 684
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Re: are 2wd sm465 trans junk?
The 465 has a provision for a mount on the rear of the transmission. The SM420 does not it used two rear engine mounts on the bellhousing. I like to install Pontiac engines in the 60 thru 72 trucks. and the only bell housing mount stick shift Pontiac engines where in 55 thru 59 GMC trucks. so with the 465 trans I can three point mount a Pontiac engine in a GM truck using a Pontiac bellhousing or a steel scattershield. At present I have a 465 in a 86 two wheel drive 3/4 ton and another in a early square cab 3/4 ton 4 wheel drive.
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