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Post by vmrod on Jan 25, 2009 0:58:01 GMT -3
I picked up a used tranny for under $200 on ebay. Kinda old and grimy, but not too bad. It would likely have been worth it, to simply spend another hundred or 2, and get one that has been refurbished. That way, it is clean and ready to go! Hopefully, this will give me no probs.
Instead of flipping the ring gear, I'm wondering if I shouldn't just order my motor so that it will run in the opposite direction? That way I wouldn't have to flip anything. I'm pretty sure that the Warp 9 is versatile enough to run either CW or CCW, depending on how you set it up.
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Post by chrisdolph on Jan 27, 2009 14:47:07 GMT -3
I've never had a VW transaxle apart but I assume they use helical gears both internally in the transmission and for the ring and pinnion. It is designed for the input to be a certain rotation and if you reverse it you will probably get abnormal noise and wear. Its best to keep it stock and flip the ring gear.
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Post by vmrod on Jan 27, 2009 23:44:15 GMT -3
Isn't flipping the ring gear suppose to allow the transmission to work properly. (since the electric motor spins opposite of the VW engine). I thought that if the electric motor spins the same directions as the VW motor, then there is no need to touch the ring gear. Certain electric motors can be ordered to operate either way. ...or does flipping the ring gear serve another purpose?  |
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Post by chrisdolph on Jan 28, 2009 22:35:45 GMT -3
the electric motor needs to have the same rotation as a vw engine. the transmission is installed in the xr3 backwards, you need to flip the ring gear so you have 4 fwd speeds and 1 reverse instead of 4 reverse, 1 fwd.
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Post by vmrod on Jan 29, 2009 15:48:00 GMT -3
Ok, let's see if I have it correct.
1. If the e-motor rotates just as the VW-motor, the wheels will spin backward, cuz everything is spun 180 degrees.
2. If the e-motor spins opposite as the VW-motor, the wheels will spin OK, however their may be an issue with abnormal wear and noise.
*****
So, I was correct by thinking of the wheel direction for option #2, but I didn't consider the possiblity of abnormal wear and noise due to the reversal of the motor direction.
Do you know anyone that has actually run a VW tranny backward without flipping the ring-gear?
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Post by vmrod on Jan 30, 2009 12:48:03 GMT -3
I talked to Mr. Riley this morning. He is unsure if the VW tranny uses helical gears or not. If helical gears are being used, then yes, the ring-gear should be flipped. Rather than figure out if the tranny has helical gears or not, it's probably wisest to just flip the gear, just to be safe. Mr. Riley also pointed out that some VW type 1 trannies cannot have the ring gear flipped. He said that if you only have 1 round side cover (near the output shaft), then you cannot flip the ring gear. You need to have a round, removable cover on each side of the tranny, to be able to flip the ring gear. Good to know! (I'll check mine today...fingers crossed.) Big thanks to Chris, for pointing out the potential issue here! Flipping the ring-gear will give me something to do!  |
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