40 series torque converter clutch spring

[rydr93]

Hi all,
I am new here and hope for your help.

Recently I just bought aftermarket 40 series TC, but spring in clutch are too weak. I need to increase clutch engagement RPM above 2000, so I definitely need a "red spring".

But here is the deal. I am from middle Europe and dont have change to get "red spring" from US market for any reasonable price. I measured dimension of spring what I have now. Wire diameter is 2mm. I guess that stronger spring should has little bit bigger wire diameter. Other dimension are probably same.

Does anybody know what is the wire diameter for the stronger spring? I have found something about 2.5 mm, but not sure. I am trying to find some alternative for it.

Thanks guys.

 

[itsid]

Hi and welcome;

you're on the wrong path!..
the spring you are talking about is NOT the clutch spring, it's not even the clutch!
the clutch is the front pulley not the rear pulley.

You need red springs, but THREE not one, the order number is 203040A (comes in a set of three)
and they can easily be found online (ebay, amazon, several webshops)

and yes, 20 bucks plus 20 bucks shipping is not uncommon for small stuff like that,
but you can't wind your own anyways since it's not about wiredimensions alone I'm afraid.
what alloy steel, tempered to what hardness etc..
if you don't hit the correct pull strength of the spring, you'll be off by 1000rpm of engagement speed .. and again you need three to be perfectly identical or you'll ruin your TC by the resulting imbalance.

Heck I bet you find those on aliexpress or alibaba as well and get a set for 8 bucks plus 5 shipping or such...

'sid

 

[rydr93]

Thank you for answer.
Yes, I meant front pulley with three"red" or "yellow" springs. Just wrote not exactly right. But yes, you are right about the spring parameters. It just only my estimate about the wire diameter. Because with trying to find some right springs for my needs can costs me more than order to right one.
I have found, for now, that ebay is sold out and aliexpress unfortunately does not offer these stuff. But keep finding.

Thanks.