Need help with a part #
 

Ok, I posted this in the transmission forum yesterday but no response yet and I've searched and no luck...I need a part number for a 1990 RS 700R4 VSS.
Advance has two different ones :

BWD Vehicle Speed Sensor
Part No. S8033
Warranty: 1 YEAR REPLACEMENT IF DEFECTIVE
w/ 53 mm Dia.
$58.69

and


BWD Vehicle Speed Sensor
Part No. S8301
Warranty: 1 YEAR REPLACEMENT IF DEFECTIVE
w/ 22mm Dia.
$117.19

They are different sizes, which one do I need.

Thanks,
Mike

Re: Need help with a part #
 

buy both and take back the one you dont need back, or take the one you have out and with you might be the only way

Re: Need help with a part #
 

I was trying to avoid buying both, even though I would be returning one. I haven't pulled the old one yet because I understood transmission fluid would leak out. I had hoped to pull one out and put the new one in. I have never done this, will I lose much fluid during this?