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06-05-2014, 09:36 PM
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#1 |
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Registered User
Join Date: Jul 2012
Location: Jackson, Oh
Posts: 20
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Will 4l60e fit in 1970 c20 with factory sm465?
I have a 1970 c20 with a factory 4 speed sm465. It has that big transmission cross member towards the front and of course its riveted in.
Im installing a 95 lt1. Do you guys know if I have to cut the cross member out so a 4l60e will fit? thanks, Kris 
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06-05-2014, 09:45 PM
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#2 |
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Registered User
Join Date: Jul 2012
Location: Jackson, Oh
Posts: 20
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Re: Will 4l60e fit in 1970 c20 with factory sm465?
When I bought it a year ago.
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06-05-2014, 10:39 PM
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#3 |
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Registered User
Join Date: Jul 2012
Location: Jackson, Oh
Posts: 20
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Re: Will 4l60e fit in 1970 c20 with factory sm465?
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06-06-2014, 06:51 AM
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#4 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: Will 4l60e fit in 1970 c20 with factory sm465?
That's a pretty rare C/20 there. I've never done the swap,but I know automatics take a different crossmember than manual. I believe on a factory auto truck the crossmember either needs to be moved back and/or you need the 4L60e crossmember. I believe companies like Early Classics offer a swap crossmember,but could be wrong.
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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06-06-2014, 08:38 AM
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#5 |
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Registered User
Join Date: Jul 2012
Location: Jackson, Oh
Posts: 20
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Re: Will 4l60e fit in 1970 c20 with factory sm465?
I figured it will need to be removed.
Its the first 67-72 I have owned so I don't know much about them. I think it was ordered as a cab and chassis cause there are no bed mounts and doesn't look like they were cut off. The cab light are factory cause it has the stamped roof.  As far as the dually stuff it has the narrow rear end and it all looks factory but I was told that a c20 never came as a dually so I'm not sure. It also has rear coil springs which I thought was unique for the combo also. When I ordered a front wheel stud the parts store told me it was the size of a 73. Any info would be great. |
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06-06-2014, 08:42 AM
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#6 |
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Registered User
Join Date: Jul 2012
Location: Jackson, Oh
Posts: 20
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Re: Will 4l60e fit in 1970 c20 with factory sm465?
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06-06-2014, 09:10 AM
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#7 |
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Hittin E-Z Street on Mud Tires
 
Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: Will 4l60e fit in 1970 c20 with factory sm465?
If you're talking about the one that is installed near the front of the trans, take it out, you'll need a rear mount cross member for the automatic. It's a pain in the ass too.
__________________
Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride  American Born, Country by the Grace of God  1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! |
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06-06-2014, 09:12 AM
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#8 |
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Registered User
Join Date: Jul 2012
Location: Jackson, Oh
Posts: 20
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Re: Will 4l60e fit in 1970 c20 with factory sm465?
I was going to keep the sm465 but with the low gears... IDK
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06-06-2014, 09:16 AM
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#9 |
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Hittin E-Z Street on Mud Tires
Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: Will 4l60e fit in 1970 c20 with factory sm465?
??? I thought you said you wanted the 4L60? You can always torch the rivets, save the cross member, and bolt it back in with Grade 8 Bolts.
__________________
Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! |
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06-06-2014, 09:18 AM
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#10 |
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Registered User
Join Date: Jul 2012
Location: Jackson, Oh
Posts: 20
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Re: Will 4l60e fit in 1970 c20 with factory sm465?
I did. Cant decide which one to go with.
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06-06-2014, 10:32 AM
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#11 |
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Registered User
Join Date: Apr 2004
Location: Las Vegas, NV
Posts: 2,188
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Re: Will 4l60e fit in 1970 c20 with factory sm465?
My '72 was factory auto and I needed only to move the stock cross member back a bit. Pretty sure CPP and ECE sell new conversion/drop cross members if yours is different.
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RIP EastSideLowLife '72 C20 SWB convert. 5 lug, LS1/4l60e |
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06-06-2014, 03:05 PM
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#12 |
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Registered User
Join Date: Dec 2013
Location: Dunwoody,Ga
Posts: 443
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Re: Will 4l60e fit in 1970 c20 with factory sm465?
Talk to these guys,
http://www.brphotrods.com/mm5/mercha...gory_Code=CNV9 |
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