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Hello all.
I purchased a 74 vette last year with no known history.
It came with an 86 3/4 ton 4-bolt main truck engine that was already 30 over.
It was running fine but was tired and I decided to rebuild. I never even got the car over 60 mph before the rebuild bc the suspension bushings were so worn that it wandered very bad at speeds. Otherwise, the TC seemed to operate fine.
The only markings on the torque converter were in white marker but no stampings.
The markings were 47013 and 37-00CB.
I googled these numbers and all I came up with was 47013 is a Boss Hogg Street Bandit 2800-3200 stall converter for a TH350 trans. Your guess is as good as mine if these were actual model numbers or a junk yard designator.
If the number is true, what differentiation is there between the TH350 and the TH400 trans in relation to this TC?
My trans is the 400 and was running fine with this TC.
Im having my 350 bored and stroked with vortec heads, .040 hyper pistons, retro roller cam and shooting for 9.5-10.0:1 compression.
No sure yet what to expect as far as hp goes, as I haven’t made any firm decisions on cam specs.
I know it’s usually a safe bet to purchase a new TC for a rebuild, but my budget is getting stretched with this build and wondering if anyone can shed any light on my TC.
Thanks all!
Last edited by Jarhead 74 Vette; Mar 15, 2021 at 08:17 AM.
Reason: Additional information
Have you tried contacting the suspected manufacturer to see if they can confirm it's theirs?
No, I have not. Sounds like a good idea, though.
Should’ve been one of the first things I did, but I went to my “go-to” pals on CF first.
I’ll take your advice tomorrow.
thx
The reason I suggested yours was a stock 12 inch converter is that a 10 inch requires "ears" to reach the flex plate bolt holes and I didn't see that on yours. I did however take a stock vega converter one time, and re-drill the flex plate to enable it to bolt up.
On a budget:
Flush the converter in a clean container and see "what comes out of it". If the container doesn't have flakes/metal particles/etc. and it is designed to fit the trans you have, don't stress about the details.
See Youtube videos if you decode......decide to flush it yourself.
Last edited by doorgunner; Mar 17, 2021 at 01:36 AM.
Torque converter question
