GMT Number on Pitman Arm

[Allen N.]

What is the meaning of the three digit number after GMT on a 3741383 pitman arm for a power steering car? I see them for sale on ebay with 166, 167, 169, 170 and 171. Is this a year designation?

Thanks,
Allen

[Joe L.]

Re: GMT Number on Pitman Arm

What is the meaning of the three digit number after GMT on a 3741383 pitman arm for a power steering car? I see them for sale on ebay with 166, 167, 169, 170 and 171. Is this a year designation?

Thanks,
Allen

Allen------

The "GMT" represents "General Motors-Tonawanda". In this case it refers to the old Tonawanda Forge which was one of 3 GM forging plants in days-of-old. The 3 digits following that represent forging die numbers. Each die set includes a number assigned to that set. That number is used for quality control purposes. The only way to know what the original forging number was for any original forging on a car is to have the original part. There's no other way to know it. Consequently, there's no way any number could be judged as correct or incorrect.

[Allen N.]

Re: GMT Number on Pitman Arm

Thanks Joe.