LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

Lsx swap question

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Old Jan 17, 2012 | 11:40 PM
  #1  
projectredsled's Avatar
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Lsx swap question

I'm bouncing around the idea of ditching my 305 for an lsx motor (instead of a 350 or 400). I currently have an 87 Camaro with 5 speed. Would it be possible to reuse my current trans with an lsx until I get the money together to pick up a 6 speed?

If it is possible, do I reuse my crossmember and flywheel?

I know that the t5 won't hold up to the increase in power for long but if I drive it conservatively until infer the 6 speed would everything else bolt up?

Thanks for the help guys
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Old Jan 18, 2012 | 12:35 AM
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xpndbl3's Avatar
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
Re: Lsx swap question

no the trans will not work
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Old Jan 18, 2012 | 09:00 AM
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From: Shakopee, Mn
Car: 89 Iroc
Engine: 305TPI
Transmission: T5
Re: Lsx swap question

Actually, the trans will work. The way I have seen it done with the best success is with a 621 bellhousing, LS1 clutch, etc. Howe racing throwout bearing, and LS7 pilot bearing. You will need to figure out how to create a shifter to correct the 17* angle of the factory mounting, but it can be done.
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Old Jan 18, 2012 | 09:11 AM
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techrunner's Avatar
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Car: 91 Formula
Engine: lq4
Transmission: t-56
Re: Lsx swap question

yeah, sure you could make it work. but by the time you get it all sorted out i bet you'd be over half the cost of just picking up a used t56 and doing that, which will also be a ton easier. just wait to swap until you can do it with the t56 and not waste money on a t5 thats not gonna stay long anyway.
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Old Jan 18, 2012 | 09:14 AM
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1985WS6TA's Avatar
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From: Norfolk,NE
Car: 1985 WS6 Trans Am T-Top
Engine: 355 TPI N/A
Transmission: Borg/Warner T-5
Axle/Gears: 3:42
Re: Lsx swap question

Originally Posted by Drkhrse89
Actually, the trans will work. The way I have seen it done with the best success is with a 621 bellhousing, LS1 clutch, etc. Howe racing throwout bearing, and LS7 pilot bearing. You will need to figure out how to create a shifter to correct the 17* angle of the factory mounting, but it can be done.
Does the T-5 26 spline input shaft match the 26 spline LS T56 26 spline shaft??

If it was me, I'd just save up and find a T-56 right away. Why go to all that trouble getting those parts when you can find a decent T-56 for $400-$1200 ready to go. Remember though, you need a 98+ T-56 if/when you do it.
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Old Jan 18, 2012 | 09:14 PM
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Re: Lsx swap question

sounds like i should just keep stacking parts until i have everything ready to go in. Thanks for the info guys
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Old Jan 18, 2012 | 09:18 PM
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: Lsx swap question

Like the others say find a t56. You'll even get another gear over that t5!
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Old Jan 18, 2012 | 09:42 PM
  #8  
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Re: Lsx swap question

Originally Posted by 1985WS6TA
Remember though, you need a 98+ T-56 if/when you do it.
I thought that the 93-97 t56 was the one that was a direct bolt in (other than crossmember)? and that the 98+ required changing alot of stuff
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Old Jan 18, 2012 | 09:46 PM
  #9  
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: Lsx swap question

Originally Posted by projectredsled
I thought that the 93-97 t56 was the one that was a direct bolt in (other than crossmember)? and that the 98+ required changing alot of stuff
Lsx will bolt up to 98 to 02 t56
ltx will bolt up to 93 to 97 t56

Corvette and gto t56 will require quite a bit of changing to make work. 98 to 02 is what you need
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Old Jan 18, 2012 | 09:55 PM
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Re: Lsx swap question

wow....i knew that. forgive my stupidity..lol
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