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Old 07-20-2019, 11:42 PM   #15
Zombie killer
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Quote:
Originally Posted by olblue75 View Post
I have 1LE axles and was running 3.91's on a stock diff and never had a problem, then I switched to a Z28 still running the same axles and did a track day in May with no issues. I have bought a set of Z28 axles and the lines to make the diff cooler functional that's the next project on the books after cam and head swap.
Are you running with a dropped suspension or factory ride height? That may be the difference. I may try a higher temp grease and see if that helps.
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Old 07-21-2019, 12:02 AM   #16
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I am very curious to figure out this axle boot mystery myself. I am running 19” rims and when checked according to the measuring setup above, I am dead on 25.5”. However I started developing axle grease slinging out the drivers side after I installed a factory 1LE rear diff in my SS. So I installed new GM axles on both sides the day before NCM at CFest9. Guess what? One day on track and I can see evidence of fresh axle grease. So what gives ? I wonder now if I am generating heat thru the rear diff for some reason that gets the grease in the axle boot hotter some how. The drivers side is my only bad side, which of course has the less diameter half shaft to dissipate the heat. I guess I will be watching this issue more and try to figure it out. Might start checking temps with a infrared gun back there more often.

Anybody experience similiar issues that they have pinpointed the culprit ??
Just curious if you’ve ck the diff bushings for give?

I know when I ran NCM, it was hard on the drivers side suspension...

-Don
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Old 07-21-2019, 03:48 AM   #17
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Dropped

Quote:
Originally Posted by Zombie killer View Post
Are you running with a dropped suspension or factory ride height? That may be the difference. I may try a higher temp grease and see if that helps.
I'm running 1" dropped BMR springs.
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Old 07-22-2019, 11:31 PM   #18
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Just curious if you’ve ck the diff bushings for give?

I know when I ran NCM, it was hard on the drivers side suspension...

-Don
Brand new diff bushings last year when I swapped in the 1 LE diff. In fact it has the Delrin center bushing. I always do a good check over before any track day with a nut and bolt check but I didnt see anything wrong.
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Old 08-16-2020, 12:10 PM   #19
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Ran into similar issue on my 2010 SS. AAM 3.70 gears, BMR diff, subframe bushings, DSS prepared road course stock axles, BMR trailing arms, toe links and trailing arms bushing in hub. My problem was torn passenger side outer boot but no grease came out as I caught it right away. This happened twice. Rear was at 25 3/4" height from bottom lip of wheel to center of wheel arch. So, getting car ready for hopefully 1 or 2 track days this fall I've installed Hendrix poly offset diff bushings and GForce Renegade axles as well as raised the rear ride height measurement to 665mm or 26 1/4". Time will tell if this solves the issue, though an expensive solution.
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Last edited by flht99b; 01-04-2021 at 07:55 AM. Reason: correction
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Old 08-18-2020, 04:20 PM   #20
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CV Failing

I have raced the Gen 5 2014 1LE for 4 years www.msportsracing.com, and have solved the problem that you describe at high speed tracks like Road America and Daytona where the problem occurs in 30 minutes on a extremely lowered car.
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Old 08-18-2020, 04:22 PM   #21
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BTW my car and team did the suspension development for the Z-28 with the multimatics too for GM.
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Old 08-18-2020, 05:42 PM   #22
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I have raced the Gen 5 2014 1LE for 4 years www.msportsracing.com, and have solved the problem that you describe at high speed tracks like Road America and Daytona where the problem occurs in 30 minutes on a extremely lowered car.
Went to your web site and I couldn't find any mention of the CV problem or what you did to fix it.
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Old 11-13-2020, 04:47 PM   #23
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Sorry we use special boots and vent them to get the heat out which is key.
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Old 11-13-2020, 07:28 PM   #24
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Quote:
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Sorry we use special boots and vent them to get the heat out which is key.
Exactly what DSS stated about their road race upgraded OEM axles. I as well as others have found otherwise. Minimizing the suspension drop, offset diff bushings and higher quality axles/CV joints is the long haul cure.
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Old 01-04-2021, 02:40 AM   #25
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Guys you know dss and Hendrix’s are scammers in every way please I can’t tell you how many I know with under a hundred miles on them failed usually at speeds above 130 mph is their problem. Amazing I switched from 1400 hp dss to g force and no more problems.
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Old 01-04-2021, 06:27 AM   #26
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I've always wondered about the offset diff bushings. How much of the improvement comes from the offset and how much is from them being stiffer and minimizing overall diff movement?


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Old 01-04-2021, 07:56 AM   #27
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In my mind the offset diff bushings #1 purpose is to reduce the axle angle, especially on lowered cars. I've raised my car to 660mm front and 665mm rear measured from bottom lip of wheel to highest point of rear wheel arch. Along with the offset diff bushings the axle shaft axles angles are almost what they were stock when the car measured ~ 680mm and 685mm. Yet to do a track weekend yet, hopefully this spring. FYI, had a set of DSS prepped stock axles with their boots, "special" grease and vent tubes for the boots. Could not keep passenger side boots from tearing. This was before raising the car up 1/2" and installing offset diff bushings.
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Old 01-04-2021, 12:48 PM   #28
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DSS has always treated me right not so sure about Hendricks never had any dealings with them.
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