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Jahay · 10.26.2010, 04:22 AM

here is a tip as you are using the tranny...

I had the same problem. I couldnt run a 25t pinion with my 1520, as i couldnt push the motor out enough...

So what i did was, i ran the 39t high speed idler gear inside the tranny replacing the 44t stock idler gear (replace the 18/23t top drive gear when you do this with an HD One) and then i ran a smaller 18t pinion which sorted out my problems.

Still gave me PLENTY of torque!!! and worked really well!
Also my HD Drive gear wore very well because it used the drive for the larger 23t side rather than the smaller 18t side which have worn out faster!
Out of all the times of replacing pinions and other gears in the tranny. NOT ONCE did i replace my 39t idler of HD Drive gear! (they are built solid when shimmed correctly)

And by the way... your motor can defiintely sit back a litle more in the motor mounts... and with the smaller 18t pinion you can put it closer towards the spur and hopefully avoid hitting the TVPs...

Trust me, you went with the right choice! The flm forward mount tranny conversion is not in the same league as this! and is not as strong or have many options for flexibility!

	(#20)
Jahay RC-Monster Titanium Offline Posts: 1,007 Join Date: Apr 2010	10.26.2010, 04:22 AM here is a tip as you are using the tranny... I had the same problem. I couldnt run a 25t pinion with my 1520, as i couldnt push the motor out enough... So what i did was, i ran the 39t high speed idler gear inside the tranny replacing the 44t stock idler gear (replace the 18/23t top drive gear when you do this with an HD One) and then i ran a smaller 18t pinion which sorted out my problems. Still gave me PLENTY of torque!!! and worked really well! Also my HD Drive gear wore very well because it used the drive for the larger 23t side rather than the smaller 18t side which have worn out faster! Out of all the times of replacing pinions and other gears in the tranny. NOT ONCE did i replace my 39t idler of HD Drive gear! (they are built solid when shimmed correctly) And by the way... your motor can defiintely sit back a litle more in the motor mounts... and with the smaller 18t pinion you can put it closer towards the spur and hopefully avoid hitting the TVPs... Trust me, you went with the right choice! The flm forward mount tranny conversion is not in the same league as this! and is not as strong or have many options for flexibility!