What is your RPM's in 5th gear at a GPS confirmed 60 mph? or 50 mph? What is your tire size?
How do you know your rear is 3:73?
The reason I ask is something is not adding up here.... With 3:73 in 5th OD, you should be turning alot slower erpems.....I think I remember the guy I bought it from telling me that, but I’ll shoot him a message to see if he remembers.
Also, when I bought it the speedometer was off, so I bought a new speedometer gear that was designed to work with a 3.73 rear end. I must have been told it had a 3.73 by somebody because I definitely wouldn’t have figured that out on my own, and I wouldn’t have bought the gear unless I was sure it would work.
That being said, it still reads about 5mph fast. Not sure what that tells us, I don’t know how accurate these were from the factory.
Correct. A 275/40/17 tire should be around 25.7" in OD. You'll have to look up the brand specs to get a more accurate number as there is some variation between manufacturers.
Any pics of your wheel/tires? Wondering if they are rubber band tires.....
I am guessing you have low gears in the rear....
you can raise the rear wheels off the ground, look at the driveshaft while turning the rear wheel one turn, count how many times the driveshaft spins.
373 gears will spin three and about three quarter turns per one wheel spin.
also your 1352-065-904 is a 83-84 v 8 non world class t 5.
Also, If you do not know how many teeth are on the speedo drive gear (the one on the output shaft of the T5) then you are guessing in the dark as to what driven speedo gear (one on the end of the VSS).
Black - 6 tooth
Yellow - tooth
Translucent Green/Yellow - 8 tooth
Its hard to tell the yellow from the translucent green/yellow one but with a nice LED flashlight you can. I listed the black one as that is what I changed mine to so I could run a lower tooth count driven gear as the higher tooth count gears have a tendency to strip and not be as accurate.
No reason to have nightmares, everyone on this site is usually pretty helpful...
I reread your original post and again, you might have really low ( high ratio) rear end gears...
I had a 69 Super Bee when I was in HS with 4:10 rear gears.... Same thing with that car, you were grabbing for 2nd pretty quick.....