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Old 06-23-2005, 08:57 AM   #11851
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Will do...just got the one piece bevel gear. Just have to install it.

yeah yeah, something else down the "road" may break.
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Old 06-23-2005, 11:37 AM   #11852
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How good is the Pro4 in taking a front end hit? I heard it can tweak the shaft or ruin one if the gears in the front/rear box. Anyone had any of these problems? I'm a pretty good driver, and I want a Pro4, but I need to know what to stock up on, just in case. What is the biggest negative about the Pro4. If you can't find anything, state the best positive, please.
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Old 06-23-2005, 01:34 PM   #11853
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the biggest negative on the pro4 is the biggest negative on any shaft car, no give in the drive train. with any shaft car you will get the occational broke gear from a hard impact, more so if running a one way or spool where there is no give at all during impact. i own a tc3 and a pro4 and that is my main problem, busting bevel and diff gears with my one way. when running a normal ball diff i never had any other these problems because nothing locks up so i never broke gears. there have been lots put out for the HPI to try and sovle these problems. it has got to the point where you can get aluminum everything, which i dont think is a great idea. i got the aluminum diff gear for my one way so breakage only happens in two places the front bevel gear (you can get aluminum one piece) or the shaft out drives (0you can get purpple aluminum ones) which i left plastic so that there is some give in my drive train in case of a hard impact. i dont mind breaking these parts ever so offten because if you go to full aluminum everything some lese just has to give and these are the 2 cheapest part to replace so i would rather to that thn somthing else. but all in all the pro4 is a great car. one of the most free spinning drive trains you can get (if shimmed right) and the car is much more smooth the my tc3 as well as handling a bit better which makes it easier to drive.
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Old 06-23-2005, 02:15 PM   #11854
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Quote:
Originally Posted by loopedeloop
I chucked my hpi gears away, They strip way too easy, and have gone to kawada 48p spurs.

no stripping since
Where can I find Kawada? never heard of them. Doesn't anybody use Kimbrough????
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Old 06-23-2005, 02:27 PM   #11855
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Quote:
Originally Posted by Rcjunk-yard
Where can I find Kawada? never heard of them. Doesn't anybody use Kimbrough????
I in newzealand mate, dont know where they are stocked in US,sorry
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Old 06-23-2005, 02:32 PM   #11856
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i use RW Racing spurs, thin and light and never had one strip on me
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Old 06-23-2005, 02:36 PM   #11857
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Default Spur Gears

I do not think the HPI spur gear is prone to stripping. People who are having problems must not have the correct mesh or are getting debris in the gears. I am running the stock spur with a Novak brushless and my spur has held up fine.
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Old 06-23-2005, 02:39 PM   #11858
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yea, i have never had a gear strip on my pro4 yet. i think the main thing is the get stuff in them if yuor racing out doors or your mesh is off, or your motor screws are coming loose and letting the motor move away from the spur letting the mesh open up to big causinng strippage on impact.
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Old 06-23-2005, 02:51 PM   #11859
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Default stripped gears

I have stripped a fe but I DO race outside. 64 pitch can be a problem getting the mesh just right and that can do it. The one thing you gotta realize is that the gears aren't perfectly ROUND which creates high spots and low spots. sorry for those of you who already knew that.

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Old 06-23-2005, 05:55 PM   #11860
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Im Currently building my '05 Pro4 and am having trouble with the rear diff gears binding badly. Ive mucked around with shims for about 2 hours and still cant get a nice "quiet" mesh like i have in the front.

Any ideas?
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Old 06-23-2005, 06:00 PM   #11861
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i had the same problem, i stuffed around for hours and couldnt fix it so in the end i gave up and ordered the new hara input shafts
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Old 06-23-2005, 06:15 PM   #11862
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Quote:
Originally Posted by loopedeloop
I in newzealand mate, dont know where they are stocked in US,sorry
Then can I pay YOU to ship ME a few 64p KAWADA spurs?
Oh yeah... I'll pay for the spurs -JB
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Old 06-23-2005, 06:20 PM   #11863
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from rainbowten

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Old 06-23-2005, 06:23 PM   #11864
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Thanx domo!!! -JB
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Old 06-24-2005, 01:24 AM   #11865
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Quote:
Originally Posted by fjm9898
the biggest negative on the pro4 is the biggest negative on any shaft car, no give in the drive train. with any shaft car you will get the occational broke gear from a hard impact, more so if running a one way or spool where there is no give at all during impact. i own a tc3 and a pro4 and that is my main problem, busting bevel and diff gears with my one way. when running a normal ball diff i never had any other these problems because nothing locks up so i never broke gears. there have been lots put out for the HPI to try and sovle these problems. it has got to the point where you can get aluminum everything, which i dont think is a great idea. i got the aluminum diff gear for my one way so breakage only happens in two places the front bevel gear (you can get aluminum one piece) or the shaft out drives (0you can get purpple aluminum ones) which i left plastic so that there is some give in my drive train in case of a hard impact. i dont mind breaking these parts ever so offten because if you go to full aluminum everything some lese just has to give and these are the 2 cheapest part to replace so i would rather to that thn somthing else. but all in all the pro4 is a great car. one of the most free spinning drive trains you can get (if shimmed right) and the car is much more smooth the my tc3 as well as handling a bit better which makes it easier to drive.
idk about durability on the center shaft drive cups, but i use the aluminum ones right now. this is because i couldnt get my molded pieces to spin true, always wobbling. now the aluminum pieces fit the shaft well and spin true!

i say get onepiece front input shaft and let diff gear break (if you're using spool or oneway) and in the rear use either stock shaft or onepiece shaft (to keep the plastic bevel back there) and let the bevel be the weak spot.
this im pretty sure is also the lightest setup!

but hey dont trust me cuz i know jack about durability
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