Rear build starts

[97stanger]

Got all the goods in now, just need to install it. Went with a Detroit True Trac, Moser 31s, complete bearing/seal kit from FRPP.

Now, the question. I have been running 4.10s in the car the past 4 years...BUT it hasnt been at the power level its at now. I had two seperate tuners tell me they would go with 3.73s in a setup like this. I run 28" tall tires, and everyone knows my converter situation, but it will be in the range of 3000-3500 converter. What do you guys think, I need a new ring and pinion, should I stick with 4.10s or go with 3.73s? The one tuner told me a car almost identical to mine except with a novi 2000 was bouncing off the rev limiter w/ 4.10s in the 1/4, which is why he suggested 3.73s

 

[Javi]

Go with the 3.73's, 4.10 are a little too high for a centrifugal. IMO

 

[Win]

^^^

+1 i have 3.73's and with my S-Trim i am even wondering if i should have gone 3.55's

 

[Javi]

oh and you will have the same rear-end i do.

the tru-trac is awesome piece of engineering

 

[97stanger]

thanks guys, yeah from my understanding blower/turbo cars like more load, which means less load. And if anything the lower gear will keep me in power band longer. The True Trac looks like a sweet unit, I'll give ya my feedback on it! I have done tons of research on the units and read nothing but good about True Trac

 

[duff daddy]

not 2v tech, moved and
its easier to go with a bigger tire then it is change the ring and pinion again.

 

[97stanger]

I can't go bigger than a 28" which I'm already running...

and I have to change my ring/pinion because on decel I was getting a NASTY whine, meaning these gears are shot

 

[duff daddy]

check them out just becasue they have some whine to them doesnt mean they have failed 100% or are going to fail soon...

 

[97stanger]

"some" whine is a complete understatement, these things were ridiculous. I thought it was the bearings, when I told my tuner it was on decel he said right away the gears will need to be replaced

 

[stprorolla49]

You are definitely going to run out of gear with 4.10's, I'd say 3.73's would probably fit the ticket. I'm excited to see this thing rip!

 

[97stanger]

youre telling me! I was so excited to get it home from the dyno especially with what it pushed out with the converter problem its having and no meth yet. The next day I go to take it for a ride and washed it quick, happened to look under the car and there is a 2 foot puddle underneath the rear girdle...it hasnt moved since

 

[Paul]

If you're running a 28" tire, then you can move to 3.73s. If you need something in between, then you can simply switch to a 26" or 27" tire.

Paul.

 

[97stanger]

good call!