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S MAxx Runs Backwards?

Old 02-21-2012, 11:13 AM
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wannabflyboy
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Default S MAxx Runs Backwards?

Posting this for a friend (I'm a plane guy). He just did some work on his gas S Mazz (no reverse gear installed) and now it only goes backwards. Any thoughts?
Old 02-21-2012, 11:23 AM
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Default RE: S MAxx Runs Backwards?


ORIGINAL: wannabflyboy

Posting this for a friend (I'm a plane guy). He just did some work on his gas S Mazz (no reverse gear installed) and now it only goes backwards. Any thoughts?
Either the engine is running in reverse (wont be running very good if this is true) or one of the one-way clutches (aka one-way bearings) can be installed backwards.
Old 02-21-2012, 11:36 AM
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Default RE: S MAxx Runs Backwards?

Where would these bearings/clutches be found?
Old 02-21-2012, 11:37 AM
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Default RE: S MAxx Runs Backwards?

Or the diffs are installed upside down.  I did that on my Revo the first time I reassembled it.
Old 02-21-2012, 01:24 PM
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Snook Man
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Default RE: S MAxx Runs Backwards?

SMaxx has only 1 diff (rear), it is installed upside down.

If the engine were running backwards the OWB in the transmission would not allow it to move at all.
Old 02-21-2012, 01:47 PM
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Default RE: S MAxx Runs Backwards?


ORIGINAL: Snook Man

SMaxx has only 1 diff (rear), it is installed upside down.

If the engine were running backwards the OWB in the transmission would not allow it to move at all.
I didnt think about that or the diff being upside down. I thought most models with diffs external to the transmission couldnt usually be installed upside down... Maybe I'm wrong..
Old 02-21-2012, 02:39 PM
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Default RE: S MAxx Runs Backwards?

All Maxx trucks (T/E/S) have diffs that can be easily be installed upside down.

It is a very common mistake with those models.

Even the Revo models have diffs that can be istalled incorrectly, they have an UP stamped on the diff housing and it still happens

Old 02-22-2012, 05:32 AM
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Default RE: S MAxx Runs Backwards?

Yes it does!  When I did it, I looked for the up markings, aligned it properly, then put it down for a second to grab another part.  Inverted it without realizing it, and presto, reverse gearing!
Old 02-23-2012, 10:30 PM
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Default RE: S MAxx Runs Backwards?

does anyone know the part number for the parts needed to make the s maxx to run reverse and to make it 4x4
Old 02-27-2012, 02:34 PM
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Default RE: S MAxx Runs Backwards?

Here's the kit to make it 4X4 part#5191X.

http://buy.traxxas.com/product_info....oducts_id=7527

Also check diff installation of the front. The other common mistake is to flip it and the wheels spin in opposite directions.

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