RCCrawler Forums

87JeepWrangler · 12-18-2005, 08:45 PM

does the location of the tranny output affect things like torque twist?

in other words, given two exact copies of the same crawler, the only difference being the way in which the tranny is mounted (theoretically imagine a txt tranny right side up, vs. upside down where the output would be much higher in relationship to the links). if it would have an affect, how much difference would there be between a right side up txt tranny vs upside down?

im trying to keep my COG as low as possible, but if mounting my modified txt tranny inverted so that the motor the lowest part of the tranny, im wondering if the benefits of lower COG wouldnt outweight the negatives of the possible torque twist that would ensue.

thanks,
rob

TwistedCreations · 12-18-2005, 08:50 PM

you can always build and adjust your suspension to eliminate torque twist

87JeepWrangler · 12-18-2005, 08:54 PM

so your saying build to keep COG as low as possible, and adjust the links and suspension to eliminate any problems that arise.

yea, i guess i could do that... but how much difference will i see with my tranny output 2" higher given the same link setup? but i guess that all depends on current link and suspension setup as well.

so low COG, and concentrate on the consequences later?

TwistedCreations · 12-18-2005, 08:56 PM

I am just saying that if you have a properly designed suspension to start, you shouldn't have much change. You may have to adjust some, but someone smarter than me will chime in here

skipstr71 · 12-18-2005, 09:13 PM

I dont know nearly as much as these guys do.. but I wouldnt think that the output shaft location has anything to do with it, but I could be wrong.

I just got mine together and at first (with my shocks at a hard angle) the torque twist was horrible to say the least.. I then placed my shocks almost vertical and pretty much eliminated the twist.. If you look at the rigs that do very well, they have their shocks nearly vertical.. and when your using a long shock you still have plenty of travel...

I am not sure how much the link placement has on the twist effect, but I am sure it plays a big role.. I was happy with my link location so I delt with it in the shock location.. but listen to these guys who have built many rigs.. I am a newbie in training..

12-18-2005, 08:45 PM	#1
87JeepWrangler Rock Stacker Join Date: Dec 2004 Posts: 54	tranny output location does the location of the tranny output affect things like torque twist? in other words, given two exact copies of the same crawler, the only difference being the way in which the tranny is mounted (theoretically imagine a txt tranny right side up, vs. upside down where the output would be much higher in relationship to the links). if it would have an affect, how much difference would there be between a right side up txt tranny vs upside down? im trying to keep my COG as low as possible, but if mounting my modified txt tranny inverted so that the motor the lowest part of the tranny, im wondering if the benefits of lower COG wouldnt outweight the negatives of the possible torque twist that would ensue. thanks, rob

12-18-2005, 08:50 PM	#2
TwistedCreations Colt Python/SR9c Join Date: Feb 2004 Location: out in the shop, reloading ammo! Posts: 8,626	you can always build and adjust your suspension to eliminate torque twist

12-18-2005, 08:54 PM	#3
87JeepWrangler Rock Stacker Join Date: Dec 2004 Posts: 54	so your saying build to keep COG as low as possible, and adjust the links and suspension to eliminate any problems that arise. yea, i guess i could do that... but how much difference will i see with my tranny output 2" higher given the same link setup? but i guess that all depends on current link and suspension setup as well. so low COG, and concentrate on the consequences later?

12-18-2005, 08:56 PM	#4
TwistedCreations Colt Python/SR9c Join Date: Feb 2004 Location: out in the shop, reloading ammo! Posts: 8,626	I am just saying that if you have a properly designed suspension to start, you shouldn't have much change. You may have to adjust some, but someone smarter than me will chime in here

12-18-2005, 09:13 PM	#5
skipstr71 Rock Crawler Join Date: Mar 2004 Location: BAY AREA Posts: 557	I dont know nearly as much as these guys do.. but I wouldnt think that the output shaft location has anything to do with it, but I could be wrong. I just got mine together and at first (with my shocks at a hard angle) the torque twist was horrible to say the least.. I then placed my shocks almost vertical and pretty much eliminated the twist.. If you look at the rigs that do very well, they have their shocks nearly vertical.. and when your using a long shock you still have plenty of travel... I am not sure how much the link placement has on the twist effect, but I am sure it plays a big role.. I was happy with my link location so I delt with it in the shock location.. but listen to these guys who have built many rigs.. I am a newbie in training..

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