With the new TRF417 and R version of the TA05 V2 coming out soon, I'd like to open up a newer thread to help others tailor their car to their own driving style, or vise versa.
Final Drive Ratios:
Early to late TA05, TA05-R, TA05 MS and six month original VII production kits: 2.25:1
TA05 IFS, IFS-R, VII w/ upgrade pack, VDF, V2-R: 2.055:1
Center (all): full-time or one-way. 16T (basic), 17T (3Racing), or 18T (IFS/ late V2)
Front (all): Ball diff, one-way, or direct coupling, 36T or 37T*
Rear (all): Ball diff typically or direct coupling, 36T or 37T*
* See FDR note below, as F/R pulleys need to be the same for a uniform "gearbox" ratio
NOTE on FDR (Final Drive Ratio): Both pulleys, front and rear must have the same pitch/ amount of teeth. Ignoring this will result in driveline failure, premature wear, offset final drive ratios from front to rear, and other additional problems that we all care not to have.
My car currently has the kit's stock FDR.
I crunched the numbers together and matched the perfect 2.0:1, for brushless motors like they want, just like my old AE TC5FT.
36T diff pulleys, 18T centers from the IFS setup equals 2.0:1, so that's what I will want to change on my car quite soon.
Old school silver bars were so rare and unseen that they must have rusted and died. They looked around 2mm thick.
Blue - hard, about 1.5mm
Yellow - med, about 1.25mm
Red - soft, about 1mm
Black - see kit (medium or soft)
more later but please add on -