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02-01-2017, 10:32 AM
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#1 |
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Registered User
Join Date: Sep 2003
Location: cameron, tx
Posts: 35
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Motor Swap?
OK, I've got this motor....
 And this transmission....  Motor is an ~03 I think. 5.3 fairly low miles. Transmission is a mid nineties 4L80E. I think from a 4wd. I'm thinking about putting these two together in my '75 Blazer. It's gonna have to be cheap though. I've got several questions. Will the 5.3 PCM (which I don't have) control the earlier generation 4L80E? Is there a better (ie. Megasquirt, etc) controller for a budget to control both? The engine and trans will bolt together with a crank spacer, correct? What will I need as far as keeping the 4wd? I'm not completely opposed to keeping the fulltime, but if changing can be done cheap enough I want to look into it. I know a big chunk of these questions could be answered by searching, but this way I can keep it all in one place. Thanks in advance for the help.
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Carson 1995 Sonoma--LT1/T56, full suspension mods, curvy road style <---Hasn't moved in years 1967 Camaro--undergoing restification <--  1975 Blazer--thats what I'm here for 1978/84 C30 Crew Cab--Going to try for a spare parts build using mostly Suburban parts... |
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02-01-2017, 11:11 AM
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#2 |
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Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,939
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Re: Motor Swap?
That's a 2wd trans in the pic. It has a 2wd tail-shaft housing w/a yoke.
A 4wd would need to have the adapter in place for a transfer case w/1 yoke going toward the front & the other to the rear.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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02-01-2017, 12:03 PM
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#3 |
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Registered User
Join Date: Mar 2013
Location: Campbellsville, KY
Posts: 888
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Re: Motor Swap?
That's a 2WD transmission. The 5.3/4L80 combo won't be a bad one, but just so it's been said - if your skill level is such that you don't know the difference in transmissions, you should probably do a lot of keyword searching on this board and others before you even get into the details of your own build. Getting those two components to running/driving status in a '75 truck is far from a beginner task.
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Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue. |
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02-01-2017, 12:12 PM
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#4 |
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Registered User
Join Date: Sep 2003
Location: cameron, tx
Posts: 35
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Re: Motor Swap?
I don't have any doubts in my skill level of doing the swap, only in my skill level of 4wd and automatics. This is the only one I've ever owned.
I've done a couple LT1/T56 swaps in the past. You can convert the tailhousing to the 4wds one, right? Is this 80E specific or will the 60E work?
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Carson 1995 Sonoma--LT1/T56, full suspension mods, curvy road style <---Hasn't moved in years 1967 Camaro--undergoing restification <-- 1975 Blazer--thats what I'm here for 1978/84 C30 Crew Cab--Going to try for a spare parts build using mostly Suburban parts... |
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02-01-2017, 12:35 PM
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#5 | |
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Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,939
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Re: Motor Swap?
Quote:
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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02-01-2017, 03:16 PM
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#6 |
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Registered User
Join Date: Sep 2003
Location: cameron, tx
Posts: 35
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Re: Motor Swap?
Some Blazer pictures for reference.
  
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Carson 1995 Sonoma--LT1/T56, full suspension mods, curvy road style <---Hasn't moved in years 1967 Camaro--undergoing restification <-- 1975 Blazer--thats what I'm here for 1978/84 C30 Crew Cab--Going to try for a spare parts build using mostly Suburban parts... |
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02-02-2017, 12:04 AM
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#7 |
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Registered User
Join Date: Dec 2012
Location: Temple City
Posts: 3,580
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Re: Motor Swap?
You need to either adapt your harness to control the 4L80E or you can buy a adapter harness.
But yes it will control it just fine. |
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