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Thread: Heavy duty 38T final drive gear?

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Old 04-01-2007, 04:49 PM   #1
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Default Heavy duty 38T final drive gear?

Who's using the HPI Heavy duty 38T final drive gear part number A856 and heavy duty final drive pinion part number A857?

Ring gear:

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXTB54

Pinion:

http://www2.towerhobbies.com/cgi-bin...?&I=LXTB55&P=M

Who's just using the plain ol pot metal stockers HPI part number A855?

Pot metal stockers:

http://www2.towerhobbies.com/cgi-bin...?&I=LXTB48&P=M

Who's blown a diff gear set already???
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Old 04-01-2007, 05:48 PM   #2
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i think most people are locking the diffs solid so its not really a problem

Last edited by Nabil; 04-01-2007 at 05:48 PM. Reason: bad spelling
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Old 04-01-2007, 05:53 PM   #3
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I think it has to do that there are the same part as the rs4 mt and the people who often stuck big blocks in those.
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Old 04-01-2007, 06:55 PM   #4
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Quote:
Originally Posted by e-hills4x4 View Post
i think most people are locking the diffs solid so its not really a problem
Locking the diff would accually put more stress on the ring and pinion. At least I think!?

I'm still running the stockers with no problems, but I haven't ran it much. Was going to upgrade it after I made a chassis for it and started modding it some more.
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Old 04-01-2007, 07:11 PM   #5
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Quote:
Originally Posted by e-hills4x4 View Post
i think most people are locking the diffs solid so its not really a problem
This is the ring and pinion gear...not the spider gears inside the diffcup...so they take alot of stress in a crawler. My TLT diffs are pot metal and have held up so far when shimmed properly, but now that I just got a WK, I don't know how well the HPI ring and pinion gears hold up. Anybody else with some actual experience with these gears?

Crawlin Coles,

Have you locked your axle diffs yet?
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Old 04-01-2007, 07:18 PM   #6
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Yeah they're locked up. I only had it on the rocks once, today at a WPAC GTG, and it rained. So I didn't get to run it much. I haven't shimmed anything yet either.
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Old 04-01-2007, 09:50 PM   #7
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I'm running stock with no problems. Since the tranny seems to have a slipper built in (the loud clicking noise sometimes heard) there has been no breakage of gears in any of my rigs. YET!!! Still trying!!
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Old 04-01-2007, 10:59 PM   #8
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CrawlinColes,
Too bad you didn't get to run it a bit more today.

JIA's Dad,
Stock is probably no problem...I'm going to run it that way a few times before I change it all up. Probably going to use a locked Pede tranny with it for now, but the WK tranny looks pretty solid and like it has potential as long as its internal slipper doesn't go bad like the HPI Minizilla and Venom Mini Giant ones do.
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Old 04-02-2007, 12:12 AM   #9
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Got a buddy who's been bashing jbweld locked stock axles front and rear.
No breakage and it's been hammered on.
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Old 04-02-2007, 01:08 AM   #10
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Quote:
Originally Posted by Natedog View Post
Who's using the HPI Heavy duty 38T final drive gear part number A856 and heavy duty final drive pinion part number A857?

Ring gear:

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXTB54

Pinion:

http://www2.towerhobbies.com/cgi-bin...?&I=LXTB55&P=M

Who's just using the plain ol pot metal stockers HPI part number A855?

Pot metal stockers:

http://www2.towerhobbies.com/cgi-bin...?&I=LXTB48&P=M

Who's blown a diff gear set already???

THose are the wrong ones and cost more than if you get the ones for the MT2


This is what yoyu need: http://www2.towerhobbies.com/cgi-bin...?&I=LXJYM2&P=Z

Last edited by Gula; 04-02-2007 at 01:10 AM.
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Old 04-02-2007, 10:29 AM   #11
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Quote:
Originally Posted by GulaVW69 View Post
THose are the wrong ones and cost more than if you get the ones for the MT2


This is what yoyu need: http://www2.towerhobbies.com/cgi-bin...?&I=LXJYM2&P=Z
Ahhh...thanks but dang that's still pricey. I'm going to see how the stockers last before I buy the HD gears.
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