I've a question on parts numbers

Spider

Spider

Member
Hi, I'm normally kicking around on the Model A and early V8 forums but I have a question for you later V8 fans. Who has a parts book handy?

I was at a swap meet yesterday and brought a NOS clutch release bearing still in the box, part number 74-7580-B, box says FORD, THUNDERBIRD, MERCURY but what years?

Thanks
 
A throw out bearing for a Thunderbird nearly has to be for a 55 to 57 model. I have never heard of the bigger birds having a stick transmission. That bearing should go back to 49, and up to the late 70's to mid 80's.
 
It's a bit before my days in Ford parts, but I think it's pre-WWII, about 1937 or so.

Yeah, the part number is what tells you what it fits, not the box; if Tbird is printed on the box it's just part of Ford's packaging design for the time when the part was sold.
 
I don't know much about new cars but the Green Bible shows 74-7580-5 fits '37-'39 V8 60 engines. I doubt they would reuse the part number. The number reflects the first use of the part. The part could have been used years later with the same number.

Charlie Stephens
 
Spider said:
Hi, I'm normally kicking around on the Model A and early V8 forums but I have a question for you later V8 fans. Who has a parts book handy?

I was at a swap meet yesterday and brought a NOS clutch release bearing still in the box, part number 74-7580-B, box says FORD, THUNDERBIRD, MERCURY but what years?

Thanks
Click to expand...
All Ford throwout bearings have the base part #7580.55-57 T-birds had the prefix of B5S,B6S,or B7S.The B refers to the decade 50s,5,6,or7 are the years,and S is T-bird.The sufix further definds the part in case there's more than one style.Hope this helps.
 
It is for the 1937-39 60 h.p. engine. My theory is that it was probably made for service replacement by FoMoCo in the 1950's and the boxes then in use were printed with the labeling you describe.
 
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