1. ## Gear Ratio chart

I think this is still accurate I'm sure someone will correct me if I'm wrong, lol.

72/20 = 3.6:1 ratio
72/18 = 4:1
72/16 = 4.5:1 (most torque)
70/20 = 3.18:1(most top end)
70/18 = 3.88:1
70/16 = 4.38:1

2. Mathematically the numbers are correct, however, I do not know whether those combinations will fit physically because of motor mount limitations. Funny because I mess with gearing on my electrics all the time, but more or less stick with stock gearing on my fuel powered RC's.

I'm sure a dremel rotary tool would cure any limitation in the motor mount adjustability though.....

3. They should fit the stock spur is a 72 tooth and the clutch bell stock is a 20.
The chart above is spur and clutch bell teeth.

4. Well, if you take the stock spur/cb ratio of 3.6 and divide the satted overall drive ratios of the T-Maxx you get a Final Drive Ratio of 6.686111 for 1st and 4.563888 for 2nd.
If I'm understanding this right, the Final Drive Ratio(s) is another way of saying the transmission drive ratios, right?
One other thing, do the differentials have a ratio also or are they 1:1?

5. The stock diffs are 2.85:1

I used to have a gear ratio chart somewhere, however I have seemed to misplaced it. It took into account all the different gears and did the math for you. I will look for it.

Clicky

6. The clicky chart says my Tmaxx top speed is 34mph in second gear but I am pretty sure my truck is faster then that LOL

7. Originally posted by Nolaw
The clicky chart says my Tmaxx top speed is 34mph in second gear but I am pretty sure my truck is faster then that LOL
You might be surprised.....Did you put in the correct RPM?

8. ## Really cool !

Originally Posted by Rickz96
The stock diffs are 2.85:1

I used to have a gear ratio chart somewhere, however I have seemed to misplaced it. It took into account all the different gears and did the math for you. I will look for it.

Clicky

Sorry to bring a old one up but i thought it was great thing to read and try on the clicky

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