LSX and the short vs long crank
Thread Starter
Joined: Dec 1999
Posts: 3,544
Likes: 19
From: WI,USA
Car: 89 FORMULA 350, 91 Z28 Convertible
Engine: ls1, LB9
Transmission: t56, Auto
Axle/Gears: S60/ 3.73
LSX and the short vs long crank
OK, I think most of us here know there are two differant cranks in the early LSX motors (manual, auto) so if you buy a early 5.3 or similar eng. mostlikely its from an auto trans.... it has the short crank.. but, you plan to mate it with a manual so you need to buy the spacer and all is set. your ready to go!
now my question is arent all the "LS1" eng from corvettes,f-bodies and so on short cranks? some have a t56 others have the 4l60e ?? why dont these use differant depth cranks?
now my question is arent all the "LS1" eng from corvettes,f-bodies and so on short cranks? some have a t56 others have the 4l60e ?? why dont these use differant depth cranks?
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The early truck engines had the long crank, from what I understand.
Not sure why they had different length cranks. Perhaps something to do with truck vs. passenger car transmissions. By 2000 or 2001, they were all the short type.
Not sure why they had different length cranks. Perhaps something to do with truck vs. passenger car transmissions. By 2000 or 2001, they were all the short type.
Re: LSX and the short vs long crank
They changed the flange length only with the 6.0Ls because they were the only engines that could be had with the 4L80E trans. The 4L80E trans is a conventional design, with the bellhousing boltpattern changed to the new LSx style
Later, GM introduced the spacer design to cut production costs. Same crank fits all 5.3, 5.7, 6.0's and utilizes a separate converter snub adapter to receive the traditional style 4L80E TC. This is a blessing to swappers who want to use an older trans. Otherwise they'd need a custom TC or to swap the 99-00 6.0L crank in
Later, GM introduced the spacer design to cut production costs. Same crank fits all 5.3, 5.7, 6.0's and utilizes a separate converter snub adapter to receive the traditional style 4L80E TC. This is a blessing to swappers who want to use an older trans. Otherwise they'd need a custom TC or to swap the 99-00 6.0L crank in
Joined: Sep 2005
Posts: 6,258
Likes: 6
From: O'Fallon, MO
Car: 1991 Z28 convertible built 3/1/1990
Engine: Cammed 6.0L LSX
Transmission: T56
Axle/Gears: custom Ford 8.8", 4.10 gears
Re: LSX and the short vs long crank
They changed the flange length only with the 6.0Ls because they were the only engines that could be had with the 4L80E trans. The 4L80E trans is a conventional design, with the bellhousing boltpattern changed to the new LSx style
Later, GM introduced the spacer design to cut production costs. Same crank fits all 5.3, 5.7, 6.0's and utilizes a separate converter snub adapter to receive the traditional style 4L80E TC. This is a blessing to swappers who want to use an older trans. Otherwise they'd need a custom TC or to swap the 99-00 6.0L crank in
Later, GM introduced the spacer design to cut production costs. Same crank fits all 5.3, 5.7, 6.0's and utilizes a separate converter snub adapter to receive the traditional style 4L80E TC. This is a blessing to swappers who want to use an older trans. Otherwise they'd need a custom TC or to swap the 99-00 6.0L crank in
Thread Starter
Joined: Dec 1999
Posts: 3,544
Likes: 19
From: WI,USA
Car: 89 FORMULA 350, 91 Z28 Convertible
Engine: ls1, LB9
Transmission: t56, Auto
Axle/Gears: S60/ 3.73
Re: LSX and the short vs long crank
ok, I like the responces... it what I came to as well.. thanks guys! maybe someone in a search will find this header and look in 
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gixxer92
Engine/Drivetrain/Suspension Parts for Sale
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Sep 1, 2015 04:32 PM
1999, 4l60e, 60l, 99, bellhousing, crank, cranks, crankshaft, flange, lm7, ls1, lsx, mate, measurement, spacer
