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#1 |
Registered User
Join Date: Jul 2007
Location: odessa, tx
Posts: 16
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Re: 4 speed w/granny gear...lets talk...
anyone put a late model block(96 vortec 350) in front of one of these?
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#2 |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,247
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Re: 4 speed w/granny gear...lets talk...
There isn't anything that different about bolting a SM420/465 up to a L31 Vortec engine. You'll just need a flywheel for a one piece rear main. Everything else just bolts up.
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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#3 |
Registered User
Join Date: Nov 2009
Location: stoddard nh
Posts: 693
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Re: 4 speed w/granny gear...lets talk...
ive got the sm465 in my 72 c25 and i love it though 1st and 2nd are useless around town as i got 5.13s out back, however when cold i use those gears to help speed the motor warming up
![]() heres a vid of me shifting it.
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1972 gmc c25 292/sm465 dana 60 w/5.13s 1973 vw super beetle 1600cc/4spd(baja bug) 1974 chevy c60 351v6/np-540+2 speed eaton rear 2005 chevy cobalt 2.2l |
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#4 | |
Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: 4 speed w/granny gear...lets talk...
Quote:
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'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. |
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#5 |
Senior Member
Join Date: Jul 2010
Location: South Dakota
Posts: 4,093
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Re: 4 speed w/granny gear...lets talk...
Anybody ever rebuild one of these 465s?
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1969 Chevy c20(Miss Hackjob) Last edited by treveiger; 01-29-2011 at 08:46 PM. |
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#6 |
Registered User
Join Date: Aug 2009
Location: Red Deer, Alberta
Posts: 190
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Re: 4 speed w/granny gear...lets talk...
What would you say is the best rear end set up for granny? Mine is a 3.08?
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"If you need to tell everyone how good you are - your probably not" |
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#7 | |
Six in a row makes it go...
![]() Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
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Re: 4 speed w/granny gear...lets talk...
Quote:
I know that others don't like the Gear Vendors option I showed, but it allows me to keep my 7:1 granny first, then split the remaining gears, and overdrive at .78:1. It's cheaper to put in a 5-speed, but I love that low first and all that cast iron...
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67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
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#8 |
Registered User
Join Date: Nov 2009
Location: stoddard nh
Posts: 693
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Re: 4 speed w/granny gear...lets talk...
thanks shyguy
their not overly hard to rebuild if u do make sure while your in their i believe 3rd gear needs a snap ring?(cant remember now) that helps the tranny survive if your gonna speed shift in and out of 3rd. though speed shifting these trannys can get tricky no matter how their built. but their strength is great ive seen them behind 800hp bbc in mud trucks and the axles will snap before that tranny even peeps. as for a rear end i'd look for a 3.2-3.42 if just a driver, and a 3.73 if some towing is seen. you could go higher like a 3.08 but that beggs for alot of low end torque or the need to wind up. i had a truck with a 3.55 and i felt it was a very doable gear, still had gaps but didnt need to get all tricky with the clutch or motor. (btw truck had a 305 w/stroker kit) oh yeah if your rebuilding the tranny yourself when pulling out of truck USE A JACK!! their heavy never get directly underneath it and dont sit on the seat in cab and try and jiggle it using the shifter cuz when it drops say OUCH goodbye man berries that shifter will pinch you with all 160+lbs of cast iron.(my dad just watched me then tell me after words..what did we learn??...)
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1972 gmc c25 292/sm465 dana 60 w/5.13s 1973 vw super beetle 1600cc/4spd(baja bug) 1974 chevy c60 351v6/np-540+2 speed eaton rear 2005 chevy cobalt 2.2l Last edited by 292farmer; 01-30-2011 at 10:09 AM. |
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#9 | |
Senior Member
Join Date: Jul 2010
Location: South Dakota
Posts: 4,093
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Re: 4 speed w/granny gear...lets talk...
Quote:
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1969 Chevy c20(Miss Hackjob) Last edited by treveiger; 01-30-2011 at 02:27 PM. |
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#10 |
Registered User
Join Date: Nov 2009
Location: stoddard nh
Posts: 693
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Re: 4 speed w/granny gear...lets talk...
if the tranny is fine now i wouldn't bother with a rebuild, i believe now the snap ring comes with kits as its a popular upgrade hoping someone will chime in and verify its been a couple years. believe you need a special tool for 4wd mainshaft lock nut. you'll need bearing press and a couple other tools i cant remember off hand. my dads a professional mechanic so he helped me with.
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1972 gmc c25 292/sm465 dana 60 w/5.13s 1973 vw super beetle 1600cc/4spd(baja bug) 1974 chevy c60 351v6/np-540+2 speed eaton rear 2005 chevy cobalt 2.2l |
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#11 | |
Registered User
Join Date: Aug 2009
Location: Red Deer, Alberta
Posts: 190
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Re: 4 speed w/granny gear...lets talk...
Quote:
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"If you need to tell everyone how good you are - your probably not" |
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#12 | |
Registered User
Join Date: Jan 2013
Location: Eastern TN
Posts: 1,921
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Re: 4 speed w/granny gear...lets talk...
Quote:
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#13 | |
Six in a row makes it go...
![]() Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
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Re: 4 speed w/granny gear...lets talk...
Quote:
There's other 5-speeds that have better spreads. I have a Richmond in my '66. First is fairly low and 5th is 1:1. It works pretty good with a 3.08 rear.
__________________
67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
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#14 |
Senior Member
Join Date: Jul 2010
Location: South Dakota
Posts: 4,093
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Re: 4 speed w/granny gear...lets talk...
The tranny is starting to leak and show signs of wear. And my truck is 2wd an is a 69, would the tranny be different from the 70s 465?
Thanks.
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1969 Chevy c20(Miss Hackjob) |
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#15 |
Registered User
Join Date: Nov 2009
Location: stoddard nh
Posts: 693
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Re: 4 speed w/granny gear...lets talk...
i cant imagine their any different,
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1972 gmc c25 292/sm465 dana 60 w/5.13s 1973 vw super beetle 1600cc/4spd(baja bug) 1974 chevy c60 351v6/np-540+2 speed eaton rear 2005 chevy cobalt 2.2l |
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#16 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: 4 speed w/granny gear...lets talk...
Had a 4 speed granny low (SM465) in my 1979 GMC 3/4 ton. Best manual tranny I ever had. Pullin' and haulin' they can't be beat. Even on the trail.. dump the NP205 into 4 Low, run the tranny in granny... and let the clutch out. It would crawl places a Billy Goat couldn't. You could walk faster than that thing would crawl at idle...
![]() I miss that truck... a lot. Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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#17 |
Still drivin' a Rat Rod
Join Date: Sep 2004
Location: Monett Missouri
Posts: 4,925
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Re: 4 speed w/granny gear...lets talk...
I have driven these 465's so long now I don't even notice. Just gas shift gas shift and smile..lol
They are impossible to tearup, mine has jumped out of 3rd for as long as I've had it and it's still going. Just waiting for me to drop the other one in that I've been saving in case it actually does quit, which I don't see happening.
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Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the *a$#* 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website |
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#18 |
Registered User
Join Date: Nov 2006
Location: Fortville, IN
Posts: 9
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Re: 4 speed w/granny gear...lets talk...
I see trucks with sm465 transmissions. I bought a 66 c10 chevy. It has been changed from a column 3 spd to a 4sp granny but the numbers on the side are 2c gm 477 , 3901127. It looks like it may have a power take-off on the side. On the top behind the shifter the numbers are D208, 3706. Anyone have or know about one of these transmissions? thanks, Dick
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#19 |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,247
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Re: 4 speed w/granny gear...lets talk...
If reverse is towards you and down it is a SM420. If reverse is away from you and down it is a SM465. If the top cover is aluminum it is a SM435.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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#20 | |
Six in a row makes it go...
![]() Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
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Re: 4 speed w/granny gear...lets talk...
Quote:
http://www.novak-adapt.com/knowledge/sm420.htm
__________________
67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
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#21 |
Registered User
Join Date: Nov 2006
Location: Fortville, IN
Posts: 9
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Re: 4 speed w/granny gear...lets talk...
Thanks Captainfab, my reverse is dwn an away so it's a sm465. And Shaky, the 66-67 builds were great, and the road trip in my favorite yr. chevy truck to Alaska, priceless!
Thanks to both, Dick |
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