Need part and casting #'s for LT4 H/B
12-20-2003, 08:58 PM
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Need part and casting #'s for LT4 H/B
Anyone have the part numbers and casting numbers for the LT4 Harmonic Balancer and the LT4 Hub? I especially need the hub casting number.
Thanks
Steve :chevy
Thanks
Steve :chevy
12-20-2003, 10:30 PM
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Re: Need part and casting #'s for LT4 H/B (SwagonS)
I don't recall any casting numbers on the parts but here is the GM OEM Part numbers for the LT4 hub and balancer:
Hub: 12550097 Fits 96 thru 97 LT1 and LT4
Balancer: 12551486 Fits all LT4
The only difference between the hubs is that in 1996 model year on up, GM installed a crank position sensor reluctor plate between the hub and the crank timing sprocket, so this hub is shorter by the thickness of that reluctor plate.
Hub: 12550097 Fits 96 thru 97 LT1 and LT4
Balancer: 12551486 Fits all LT4
The only difference between the hubs is that in 1996 model year on up, GM installed a crank position sensor reluctor plate between the hub and the crank timing sprocket, so this hub is shorter by the thickness of that reluctor plate.
12-20-2003, 10:36 PM
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Re: Need part and casting #'s for LT4 H/B (SwagonS)
Thanks tjwong.
I found a used hub but the only ID found on it is 630287 24.
Anyone else?
I found a used hub but the only ID found on it is 630287 24.
Anyone else?
12-20-2003, 10:49 PM
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Re: Need part and casting #'s for LT4 H/B (SwagonS)
I have a brand new LT4 hub in my hands, there are no numbers casted or scribed into it. However I measured it, so you can measure yours and see if its the same. From the bolt face surface (where the balancer would contact the hub) to the bottom of the hub where it would press against the CPS reluctor plate measures 3.025" That should tell you what you have. If yours measures about .100 to .125" longer then you have a 92 to 95 hub.
