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      02-06-2013, 03:53 PM   #1
Rotary Rasp
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Upgraded Diff Bushings

Besides the $700 dif lock kit, what are our options for upgraded diff bushings?
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      02-06-2013, 04:02 PM   #2
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1) Delrin - from Turner Motorsports
2) Poly - from Powerflex

I'd pick 1
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      02-06-2013, 06:12 PM   #3
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Originally Posted by nitehawk View Post
1) Delrin - from Turner Motorsports
2) Poly - from Powerflex

I'd pick 1
Why do you prefer the delrin bushings?
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      02-06-2013, 06:33 PM   #4
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Poly's still flex. The delrins have been confirmed to work well with Defiv's partial lock down kit. And the difference in NVH between the two appears to be negligible
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      02-06-2013, 07:26 PM   #5
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Quote:
Originally Posted by Rotary Rasp View Post
Besides the $700 dif lock kit, what are our options for upgraded diff bushings?
With what happen to your driveshaft I wouldn't hesitate to get the lockdown kit...I am installing mine as we speak!
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      02-06-2013, 07:30 PM   #6
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Quote:
Originally Posted by robc1976 View Post
With what happen to your driveshaft I wouldn't hesitate to get the lockdown kit...I am installing mine as we speak!
It would be nice to have... honestly, it's too much money. That kit shouldn't be more than $300, it can't be more than $50 in materials.
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      02-06-2013, 08:33 PM   #7
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Quote:
Originally Posted by Rotary Rasp View Post
It would be nice to have... honestly, it's too much money. That kit shouldn't be more than $300, it can't be more than $50 in materials.
Materials maaaybe...

But machining pieces with the tolerances Rick must do on those aluminum bushings is insanely expensive. Precision is super pricey, plus you're paying for the R&D, building various versions and testing etc etc. Also you have to realize that it's probably super low volume, and takes quite a bit of time for one person, and the guy needs to make a living. I can see why it costs so much. I wouldn't be surprised if the production cost for a small boutique outfit like Ricks is $200-300 + R&D/Support Costs.

You consider he might sell 30-40 of these kits to a very niche group of people/year...You can see the math, he's really not making a ton of money.

The way I looked at it is if it saves my driveline, I am HAPPY to spend 700 dollars. After I broke one halfshaft the bill was around 700+ dollars for parts, labor and cleanup of all the grease that went everywhere + the tow and the inconvenience of being stuck on one of the busiest San Francisco streets. Not to mention how much more planted the car feels!
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      02-06-2013, 08:38 PM   #8
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Quote:
Originally Posted by joec500 View Post
Materials maaaybe...

But machining pieces with the tolerances Rick must do on those aluminum bushings is insanely expensive. Precision is super pricey, plus you're paying for the R&D, building various versions and testing etc etc. Also you have to realize that it's probably super low volume, and takes quite a bit of time for one person, and the guy needs to make a living. I can see why it costs so much. I wouldn't be surprised if the production cost for a small boutique outfit like Ricks is $200-300 + R&D/Support Costs.

You consider he might sell 30-40 of these kits to a very niche group of people/year...You can see the math, he's really not making a ton of money.

The way I looked at it is if it saves my driveline, I am HAPPY to spend 700 dollars. After I broke one halfshaft the bill was around 700+ dollars for parts, labor and cleanup of all the grease that went everywhere + the tow and the inconvenience of being stuck on one of the busiest San Francisco streets. Not to mention how much more planted the car feels!
+1 and Rick as VERY good customer service! Kit is well worth the money.
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      02-07-2013, 02:19 PM   #9
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Can the front diff bushings be replaced without dropping anything? It looks like there might be enough room to do it...
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      02-07-2013, 04:09 PM   #10
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Quote:
Originally Posted by Rotary Rasp View Post
Can the front diff bushings be replaced without dropping anything? It looks like there might be enough room to do it...
If you are beatingn them out possibly, using a tool no.
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      02-08-2013, 12:19 AM   #11
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Quote:
Originally Posted by Rotary Rasp View Post
Can the front diff bushings be replaced without dropping anything? It looks like there might be enough room to do it...
Anything? No, the diff needs to come out. To remove the diff you need to remove the exhaust and unbolt the driveshaft and axles from the diff. The subframe can stay up, no need to drop it. I think JoeC500 posted a nice pic in his thread recently.
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      02-08-2013, 01:00 AM   #12
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Quote:
Originally Posted by Dave W. View Post
Anything? No, the diff needs to come out. To remove the diff you need to remove the exhaust and unbolt the driveshaft and axles from the diff. The subframe can stay up, no need to drop it. I think JoeC500 posted a nice pic in his thread recently.
BOOM!

And Thanks Dave for doing a great install at FFTEC, the car feels sooo much more planted and just drives in a straight line.

http://www.e90post.com/forums/showthread.php?p=13415947
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      02-08-2013, 07:32 AM   #13
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I am doing a full DIY on the differential lockdown unit. Just waiting on my differential. The rest is complete.
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      02-08-2013, 08:22 AM   #14
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Here ya go:
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      02-08-2013, 09:27 AM   #15
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Quote:
Originally Posted by robc1976 View Post
I am doing a full DIY on the differential lockdown unit. Just waiting on my differential. The rest is complete.
Great! I am installing my lockdown kit soon and having your DIY would certainly help.
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      02-08-2013, 09:36 AM   #16
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Quote:
Originally Posted by Blaster400 View Post
Great! I am installing my lockdown kit soon and having your DIY would certainly help.
It will be vey easy to read, pics of everything...not to hard at all
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