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03-27-2010, 11:06 PM
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#1 |
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Registered User
Join Date: Dec 2008
Location: richmond, MO
Posts: 794
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4l80e swap?
putting a 4l80e in my truck had 350 turbo what cross member do i need
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03-28-2010, 12:34 AM
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#2 |
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Active Member
Join Date: Apr 2005
Location: Miami, Florida
Posts: 286
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Re: 4l80e swap?
Stock cross member will work, it needs to be measured to the length of the new tranny, then re-drill the frame for that position. You will also need a 4L80e mount and bit of fabrication to have it fit the stock x-member.
I'm doing the swap from a th400 to a 4l85e super-matic the end of next week, I'll get some pictures up to show off my "electrician trying to play mechanic" skills, you can learn from my mistakes...
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"The Great State of Florida" |
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03-28-2010, 10:39 AM
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#3 |
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Registered User
Join Date: Dec 2008
Location: richmond, MO
Posts: 794
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Re: 4l80e swap?
well i don't mind buying aftermarket cross member would in fact rather do so then trying to mod old one and having it look like sh**.cause im no fabricator
Last edited by weircc; 03-28-2010 at 10:40 AM. |
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03-28-2010, 11:57 AM
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#4 |
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Active Member
Join Date: Apr 2005
Location: Miami, Florida
Posts: 286
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Re: 4l80e swap?
There are a few aftermarket cross members out there ranging in price from $70.00 to $270.00 they are all basically the same part give or take powder coating, painted or raw. Thing is all those that I have seen are advertised as being for a TH350, TH400 or 700-R4 none of them are specific for a 4l80e, or 4l60e.
Also the tranny mount itself is a different piece for a TH's and a 4L's, I think one is two bolts to the tranny and the other one bolt to the tranny? Anyone else out there having done this conversion with an aftermarket x member what did you use and what was the solution?
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"The Great State of Florida" |
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03-28-2010, 05:16 PM
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#5 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: 4l80e swap?
I am curious about how the speedo is done.
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"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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03-28-2010, 06:11 PM
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#6 | |
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Active Member
Join Date: Apr 2005
Location: Miami, Florida
Posts: 286
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Re: 4l80e swap?
Quote:
I pined over this as well going from a mechanical to an electric speedometer. The options I found were: New tranny tail shaft housing $400 then adding a drive gear, sleeve and driven gear, sleeve retainer, and bolt added another $250, So $650 total-ly insane  Cable X makes an electronic to mechanical tachographs that can also do the trick for $350 A specially machined output shaft that allows you to use a stock TH400 gear in a 4l80e A few hundred bucks for that also However I believe that all of these options require a Electronic Ratio Adapter to adjust for tire size or gear swap another $170. Needless to say the price is steep for something that should be so simple, then it hit me, two birds with one stone for about $200... And the gauges are an upgrade that I have been wanting to do for some time now and this speedo just plugs into the 4l85e harness, simple is as simple does...
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"The Great State of Florida" |
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03-28-2010, 07:44 PM
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#7 |
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Factory Strippers Rule!
 
Join Date: Mar 2009
Location: Shingle Springs, CA
Posts: 707
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Re: 4l80e swap?
Not trying to hijack, but will a 4L80E fit a low hump cab? I need to know... and I hope the answer is yes.
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"Feast your eyes on a feast of smoke." 67 Chevy Short Fleet PLAN: LQ9, 4L60, D60 Looking for School Bus Gauges - Help me out! |
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03-28-2010, 09:05 PM
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#8 |
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Registered User
Join Date: Dec 2008
Location: richmond, MO
Posts: 794
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Re: 4l80e swap?
never thought about that but don't see why it wouldn't
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03-28-2010, 10:04 PM
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#9 | |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: 4l80e swap?
Quote:
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03-28-2010, 10:26 PM
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#10 | |
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Registered User
Join Date: Dec 2008
Location: richmond, MO
Posts: 794
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Re: 4l80e swap?
Quote:
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03-28-2010, 10:37 PM
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#11 |
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Active Member
Join Date: Apr 2005
Location: Miami, Florida
Posts: 286
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Re: 4l80e swap?
Thanks for the info nova...
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"The Great State of Florida" |
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03-28-2010, 10:58 PM
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#12 |
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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: 4l80e swap?
How do you "control" it?
Is there a "stand alone" computer kit for them?
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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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03-28-2010, 11:03 PM
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#13 |
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Registered User
Join Date: Dec 2008
Location: richmond, MO
Posts: 794
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Re: 4l80e swap?
yea there is thats the downfall its 1100 dollars but i would have that much in a 700r4 that wouldn't hold the power i want
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03-28-2010, 11:17 PM
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#14 |
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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: 4l80e swap?
Wow, that is pricey!!!
It's only money though, right?
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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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03-29-2010, 10:20 PM
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#15 |
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Registered User
Join Date: Jan 2010
Location: Bremerton, WA
Posts: 29
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Re: 4l80e swap?
is there not another option for controlling it other than $1100
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'71 C20 350 TH400 2004 Subaru STi Excuses are bridges to nothingness. Last edited by cplkillian; 03-29-2010 at 10:20 PM. |
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03-29-2010, 10:43 PM
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#16 |
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Registered User
Join Date: Feb 2009
Location: minonk illinois
Posts: 224
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Re: 4l80e swap?
I have heard of guys using computers out of 90-93 chevy diesel pickups that had mech injection and 4l80
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03-30-2010, 12:08 AM
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#17 | |
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I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: 4l80e swap?
Quote:
packers05 is correct. 91 - 93 diesel trucks, 6.2 N/A and 6.5TD, had a stand alone ECM just for the transmission since the engine was no computer controlled. In '94, the engines got computers and it was integrated.
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03-30-2010, 01:18 AM
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#18 | |
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Registered User
Join Date: Oct 2009
Location: Mountlake Terrace, WA
Posts: 260
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Re: 4l80e swap?
Quote:
91 - 93 diesel trucks Trans only computor from $45 to $100
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1950 Chevy 1500 1961 C-10 1969 C-10 1971 Chevelle 2008 Dodge HD3500 Tow Rig |
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03-30-2010, 09:48 AM
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#19 |
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Registered User
Join Date: Jan 2010
Location: Bremerton, WA
Posts: 29
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Re: 4l80e swap?
that seems a whole lot more reasonable
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'71 C20 350 TH400 2004 Subaru STi Excuses are bridges to nothingness. |
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03-30-2010, 04:34 PM
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#20 |
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Registered User
Join Date: Sep 2005
Location: sc
Posts: 1,203
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Re: 4l80e swap?
my stock X-member is used along with no drilling on frame. I did use the 4l80 trans mount b/c it is slightly offset and works better.
You will need a trans controller, and it's $$. I am using an Abbot Cable X unit to run my stock speedo from the PCM. (I can ship those for $300) I have a low hump cab and plenty of room.
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71 Cheyenne C10 LWB cam'd 6.0/T56 Swap |
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03-30-2010, 08:17 PM
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#21 |
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Special Order
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: 4l80e swap?
I wondered about aftermarket speedos made for the electronic transmissions.That`s what I`ll do.My 4L80E is out of my`91 Diesel 3/4t Suburban.If I don`t resurrect that the trans goes in my`72.
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"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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06-05-2010, 10:23 PM
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#22 |
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Registered User
Join Date: Dec 2008
Location: richmond, MO
Posts: 794
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Re: 4l80e swap?
ok so i just found out mine is a 93 so what do i need for this stand alone computer does anyone have pictures or info
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