Black & Red Posted October 29, 2014 Report Share Posted October 29, 2014 Heard a lot of stories about people going to 4.10's and getting driveline vibrations. I'm planning on a 3.90/4.10 gear swap soon. How critical is this weight??? Thanks... Link to comment Share on other sites More sharing options...
95opal Posted October 29, 2014 Report Share Posted October 29, 2014 Its only use of dampening is for a stock gear. Once you swap toss it in the trash its useless Link to comment Share on other sites More sharing options...
Black & Red Posted October 29, 2014 Author Report Share Posted October 29, 2014 Ok, I would think that the increased driveline speed of a 3.90/4.10 would be a problem and the weight may be helpful in this scenario??? Link to comment Share on other sites More sharing options...
Prokiller Posted October 29, 2014 Report Share Posted October 29, 2014 usually that's from people not swapping all the bearings around, not the weight.usually that's from people not swapping all the bearings around, not the weight. Link to comment Share on other sites More sharing options...
Black & Red Posted October 29, 2014 Author Report Share Posted October 29, 2014 Thanks, I been curious because I have gone from 3.23 to 4.10 in other cars and never had a vibration issue, so this has really puzzled me... Link to comment Share on other sites More sharing options...
Blackmage Posted October 29, 2014 Report Share Posted October 29, 2014 my only vibrations were caused by the stock driveshaft. I went to an aluminum one and that took away my vibrations. Link to comment Share on other sites More sharing options...
Det_Riot Posted October 29, 2014 Report Share Posted October 29, 2014 4.30s, dynotech alum driveshaft, no damper on the pinion, no vibrations in mybutt Link to comment Share on other sites More sharing options...
F8L GT Posted October 29, 2014 Report Share Posted October 29, 2014 When I went to 4.10s I lined up the drive shaft and pinion flange marks, I have a vibration above 60. Rotated the shaft on the pinion flange 180° and vibration went away Link to comment Share on other sites More sharing options...
Black & Red Posted October 29, 2014 Author Report Share Posted October 29, 2014 I will eventually do an engine swap to a Total Engine Airflow headed 4.6 with my own custom camshaft profiles ground for me by Ultradyne, our longtime cam grinder. I am planning a 3.90-4.10 axle, so any links to the aluminum shaft??? P.S. Based on calculations, a 3.27 axle in OD would have a 2.22 FDR and turn roughly 2,033 RPM @ 70 mph. A 4.10 axle in OD would have a 2.78:1 FDR and turn roughly 2,500 RPM @ 70 mph, so we are talking a difference of only 500 RPM shaft speed. Sure seems odd that this would cause issues when I have made much bigger jumps in other vehicles... P.S. wouldn't it be wise to keep the weight bracket as it serves as a bump stop impact surface??? Link to comment Share on other sites More sharing options...
Det_Riot Posted October 29, 2014 Report Share Posted October 29, 2014 Weight is on bottom of the axle Link to comment Share on other sites More sharing options...
Black & Red Posted October 29, 2014 Author Report Share Posted October 29, 2014 Weight is on bottom of the axle Right, but the bolts that hold the weight go through the webbing and into a bracket that serves as an impact surface for the bumpstop... Link to comment Share on other sites More sharing options...
Zach Posted October 30, 2014 Report Share Posted October 30, 2014 Right, but the bolts that hold the weight go through the webbing and into a bracket that serves as an impact surface for the bumpstop... yes but the bracket itself has captured nuts, and I just used two shorter bolts and washers were the damper used to be.Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Blackmage Posted October 30, 2014 Report Share Posted October 30, 2014 I will eventually do an engine swap to a Total Engine Airflow headed 4.6 with my own custom camshaft profiles ground for me by Ultradyne, our longtime cam grinder. I am planning a 3.90-4.10 axle, so any links to the aluminum shaft???heres a link for the driveshaft:http://bit.ly/1xFXvlf or do a search for a ford aerostar driveshaft, aluminum as well and is the correct length. http://bit.ly/1xFXy0r Link to comment Share on other sites More sharing options...
Black & Red Posted October 30, 2014 Author Report Share Posted October 30, 2014 heres a link for the driveshaft:http://bit.ly/1xFXvlf or do a search for a ford aerostar driveshaft, aluminum as well and is the correct length. http://bit.ly/1xFXy0r Seriously????? What years???? Link to comment Share on other sites More sharing options...
Blackmage Posted October 31, 2014 Report Share Posted October 31, 2014 cant find the original posts i made about this. but i believe this is correct. Aluminum driveshaft from AeroStar:It needs to be from a 92-93-94 Aerostar AWD and you will need u-joint part #353 from NAPA. It is supposed to be a bolt up once the U joints are replaced.and you need to swap your flanges over from the mustang Link to comment Share on other sites More sharing options...
Black & Red Posted October 31, 2014 Author Report Share Posted October 31, 2014 cant find the original posts i made about this. but i believe this is correct. Aluminum driveshaft from AeroStar:It needs to be from a 92-93-94 Aerostar AWD and you will need u-joint part #353 from NAPA. It is supposed to be a bolt up once the U joints are replaced.and you need to swap your flanges over from the mustangWoW! That's great news!!!!!!!!!!!! Link to comment Share on other sites More sharing options...
Blackmage Posted October 31, 2014 Report Share Posted October 31, 2014 Well yes and no. It's not a performance part, don't treat is as such. You still want to go frpp or aftermarket if you want that. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Black & Red Posted October 31, 2014 Author Report Share Posted October 31, 2014 Well yes and no. It's not a performance part, don't treat is as such. You still want to go frpp or aftermarket if you want that.Sent from my iPhone using Tapatalk True, but a great upgrade for my driver.... WoW! That's great news!!!!!!!!!!!! The 353 is a "split dimension" u-joint, same style used when putting an 8" drive shaft up to a 9" differential.... Link to comment Share on other sites More sharing options...
Blackmage Posted October 31, 2014 Report Share Posted October 31, 2014 I'm talking about the d/s, not the u jointSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Black & Red Posted October 31, 2014 Author Report Share Posted October 31, 2014 I'm talking about the d/s, not the u jointSent from my iPhone using TapatalkRight, I was just commenting on the fact I am familiar with that joint. It will adapt the narrow Mustang flange to the wider Aerostar u-joint... Link to comment Share on other sites More sharing options...
