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Old 06-28-2019, 08:56 AM   #1
gixxer711
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Speedmaster rear diff mount

Anyone used this? Good or junk? Shake your teeth out?
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Old 06-28-2019, 10:31 AM   #2
Glynn
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May be another, "what's the cost and then why not insert or harrop?" situation.
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Old 06-28-2019, 12:32 PM   #3
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It looks rigid. I installed a spacer from rev shift in the OE mount. Too much vibration because the insert is hard poly. So, I went old school and linked together some long hose clamps. The trick is to crisscross the clamps over the tranny and under the x-member. It prevents the tranny from rocking and still dampens vibration.

I am not trying to prevent you from buying the unit. If it stiffens the drivetrain without vibes, I'd buy one too. But if if is hard poly and not rubber, or extremely hard rubber, than it will vibrate.
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Old 06-28-2019, 12:35 PM   #4
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Excuse me? Is this a tranny or diff mount. It looks like a tranny mount. If for the diff, then I stand corrected. But, the trick does work for tranny mounts.
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Old 06-28-2019, 12:41 PM   #5
gixxer711
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Quote:
Originally Posted by rednari2...View Post
Excuse me? Is this a tranny or diff mount. It looks like a tranny mount. If for the diff, then I stand corrected. But, the trick does work for tranny mounts.

It's a diff mount. One place that lists it mentions that is comes with both rubber and delrin bushings but I have not found that anywhere else. I plan to do something back there eventually and just stumbled across this, never seeing anything about it before, and thought I would see if anyone had experience with it.
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Old 06-28-2019, 01:32 PM   #6
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Yes, delrin is a type of polymer and commonly used in suspension bushings. Try the rubber bushings. But beware, rubber can achieve durometric hardness similar to poly.
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Old 06-29-2019, 07:43 AM   #7
LIL KID
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I bought one! Haven't had a chance to pick it up though. When I get it installed I'll let you all know what it's like.
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Old 07-10-2019, 10:33 AM   #8
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Quote:
Originally Posted by LIL KID...View Post
I bought one! Haven't had a chance to pick it up though. When I get it installed I'll let you all know what it's like.

I look forward to hearing your review, ive been thinking about this unit as well, sicne it comes with a rubber bushing option
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Old 07-10-2019, 02:16 PM   #9
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I installed one just like it but doesn't have the GTO engraved in it. Seems to work fine. Not sure it has any advantages over the insert though. I still have very slight wheel hop. I had the diff insert installed before.
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Old 07-10-2019, 02:54 PM   #10
LIL KID
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Quote:
Originally Posted by GTO_X-11...View Post
I look forward to hearing your review, ive been thinking about this unit as well, sicne it comes with a rubber bushing option

That will take a while. I'm recovering from partial knee replacement. I have picked it up and it comes with 2 sets of bushings, rubber and plastic.
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