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01-27-2016, 09:41 PM | #1 |
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Join Date: Oct 2003
Location: Carmichael, California
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5.3LS behind 85 4spd manual?
A friend of mine is picking up a 85 3/4 ton 4wd that is a factory 4spd manual and wants to install a 5.3 LS. Is there adaptors available so he can reuse the original 4spd transmission?
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Anthony |
01-27-2016, 11:17 PM | #2 |
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Join Date: May 2015
Location: Alabama
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Re: 5.3LS behind 85 4spd manual?
I used Advance adapters on mine. Youll need adapter bellhousing and the clutch pressure plate flywheel setup to make it all work. Get ready...it ain't cheap to do.
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01-27-2016, 11:23 PM | #3 |
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Location: Carmichael, California
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Re: 5.3LS behind 85 4spd manual?
I'll pass it on to him. He might decide on something else. I told him I would ask because I didnt know what was available.
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Anthony |
01-28-2016, 07:50 AM | #4 |
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Re: 5.3LS behind 85 4spd manual?
If it is the RPO M20 SM465 4 speed it is not a "high performance/racing" transmission: it will have three forward gears and a 6.56:1 creeper low gear.
He might want something else if he is going for "sporty". K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ Last edited by Keith Seymore; 01-28-2016 at 07:59 AM. |
01-28-2016, 08:24 AM | #5 |
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Join Date: Oct 2003
Location: Carmichael, California
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Re: 5.3LS behind 85 4spd manual?
It's a long bed 3/4 ton 4wd. Don't believe he is going for "sporty". I think more reliable with better power is what he wants but don't think he wants to spend a lot of money on adaptors.
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Anthony |
01-28-2016, 12:45 PM | #6 |
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Location: Alameda, CA
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Re: 5.3LS behind 85 4spd manual?
Given the same rear end, I'd expect better highway mileage with an overdrive automatic than a 465. In a 3/4 I'd go 4L80E (or a 6L80/6L90). Or an NV4500 or NV5600 if he wants to keep it stick.
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1973 C20, 350/350 |
01-31-2016, 12:42 AM | #7 |
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Join Date: Mar 2004
Location: Pueblo, CO
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Re: 5.3LS behind 85 4spd manual?
You don't have to get a complete advanced adapters setup to run the old school manual trans behind the 5.3.
Follow this link as it has a good bit of info to follow and save bucks from going with the AA stuff. http://67-72chevytrucks.com/vboard/s...d.php?t=421258 The main issue is the thickness of the flywheel on the gen 3/4 stuff differs from the gen 1 setup. Getting the flywheel they list is a little thicker to take up the difference by making the flywheel surface in the same position as the gen 1 clutch would be in. Meaning, you use the stock bellhousing and clutch. Just make sure to get the LS2 pilot bearing.
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Rob Z. 1975 K5 350/465/205/D44/12b 4" lift on 35's- RIP 1991 K5 8.1L/NV4500/241/D44/14b FWC Camper |
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