using stock gauges with LS swap harness?

gnvair said:

Where did you purchase your HPT from?

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Direct from hpt back in like 2011.

Honestly if you aren't super interested in learning HPT or planning to continue to modify stock ECU vehicles I'd just hire someone out who can do it locally or via mail.

HPT is $400 and a license is $100, if you are having someone turning off theft and adjusting things paying someone the $150-$200 to just flash it makes sense IMO.

paradigm said:

Took this photo of the installed cluster recently. Will have to take it apart again when I decide to go to an electric speedo if I do the T56 swap. There is a local T56 from a C6 corvette for sale asking $1000, but there is no bellhousing. Also I had sprayed white lithium grease into the speedo assembly to try and get it working better and that just made it worst as it stuck onto the odometer numbers.

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You need a lot more than a bell housing to make a Corvette T56 work in a conventional application. From what I have read on some of the Tremec groups, you can end up spending more converting a Corvette box than you can get a conventional T56 from a 4th gen F body or 04-05 GTO for.

If you want a T56

Unless you get an LS/LT core T56 for under $500 or get an absolutely known good working unit that needs zero rebuild parts for $2000 or less it's almost always better financially off buying the new Magnum F T56 for $3500

Why? Because almost every used t56 either takes significant effort to convert to LS style or it's been beat hard for 100k+.

Most used t56 need syncros, and the output shaft and 5/6 gear is worn and sloppy and needs to be replaced.

I bought a 'gamble' LT1 t56 for $500 + trade disassembled LS with a bad lifter in 2016. Maybe $800 in value? I put about 10k miles on in 3-4 years and by that point the syncros were shot (I couldn't put it in reverse or 1st from a stop easily). My trans got $500 of syncros and keys and $600 roughly of output shaft and gears to replace worn parts. I also spent probably 20hrs rebuilding it (1st time going through a t56). I didn't do any bearings or shims as mine seemed OK, nothing was broken just worn.

But good luck finding an LS core T56 for $800. $1500 maybe. Assume at least $1000 in repair (wear) parts and $400 if you are paying someone to do it for you. Or some good time and tools. There are some really long press lengths you need to get bearings on/off that almost nobody has. I used my lathe to press parts on.


Long story short it's really easy to end up with a $3000+ rebuilt T56 that has 75% reused parts that will be 150hp shy in power capability in comparison to a $3500 Magnum F T56 that will just go in an afternoon.