Delrin? Poly? HDPE?

[Dantheman1540]

Not sure if this is a good place to put this but since it involves a NBS Tahoe I figured what the hell.

Between my Hurst shifter and NV4500 transmission sits a 3/8" spacer made of a piece of metal with rubber molded to it. It's an OEM part but it doesn't seem to survive more than a year. I think the reason it doesn't last long is that the rubber portion of the spacer has slightly larger holes than the metal portion and is designed to have a bushing sleeve fit from the shifter mount itself to the rubber helping hold them in place. For some reason, this Hurst shifter doesn't have the same diameter holes so the sleeve cannot be added thus leaving a space around the bolt allowing some movement when installed. That minor movement coupled with bang shifting wears the rubber out quickly, loosens the shifter, and lets oil leak all over the place.

I would like to remake this spacer using something more rigid, oil resistant, and having the correct sized holes to eliminate any possible movement. My question is what would you guys make it out of? I could probably get a sheet of steel and cut one out then use RTV between the surfaces to help reduce unwanted metal on metal vibration noises but drilling the steel would suck, as would cutting the shifter hole out. I was thinking possibly I could use some sort of plastic that would reduce vibrations yet be rigid enough not to tear and not melt with the oil exposure.

 

[randeez]

sendcutsend.com

or look somewhere like mcmastercarr or fastenall and find the right bushing for the mounting screws?

 

[Bill 1960]

Easy enough to machine that from HDPE, however I think getting it oil tight might be problematic because nothing sticks to that stuff.

Can you drill out the holes in the shifter and allow use of the intended bushings?

 

[Dantheman1540]

sendcutsend.com

or look somewhere like mcmastercarr or fastenall and find the right bushing for the mounting screws?

Cool site! I suppose I could get a smaller bushing for just the spacer but the rubber still seems to degrade rapidly.

Easy enough to machine that from HDPE, however I think getting it oil tight might be problematic because nothing sticks to that stuff.

Can you drill out the holes in the shifter and allow use of the intended bushings?

Drilling the shifter is probably the best option I was thinking about that after I posted. I didn't even think about getting rtv to stick to HDPE.

 

[Dantheman1540]

I suppose I could cut the current bushing sleeves to fit just inside the rubber too.

 

[exp500]

Would this work for ya?

Pardon Our Interruption...

www.ebay.com

 

[randeez]

like this?

 

[iamdub]

Could you get some round stock (rod) of whatever material- aluminum, delrin, etc. in the diameter of those bolt holes, maybe slightly larger for a firm press-fit, cut them to make short cylinders, press or epoxy them into the holes then drill out the smaller inner diameter using the back side with those holes as a drill guide?

I had a Hurst shifter on the NV3500 in my S10. LOVED that thing!

 

[Dantheman1540]

Would this work for ya?

Pardon Our Interruption...

www.ebay.com

That's what I have, the problem is those little sleeves are supposed to fit through the shifter and the rubber insulator but the Hurst shifter holes are too small. Drilling them would be the easiest thing I think.

like this?

View attachment 349867

That's hawt! Doesnt look like for an nv4500 tho

Could you get some round stock (rod) of whatever material- aluminum, delrin, etc. in the diameter of those bolt holes, maybe slightly larger for a firm press-fit, cut them to make short cylinders, press or epoxy them into the holes then drill out the smaller inner diameter using the back side with those holes as a drill guide?

I had a Hurst shifter on the NV3500 in my S10. LOVED that thing!

I picked up some giant stainless roll pins from Ace and was planning to cut them down to fit tight, adding epoxy is a great idea! The Hurst shifter really is a must!

I thought it came loose again already but it was just the 2 bolts that mount the shift level to the shifter base, I never lock tited them and they dint fare well to bang shifting.

 

[iamdub]

That's what I have, the problem is those little sleeves are supposed to fit through the shifter and the rubber insulator but the Hurst shifter holes are too small. Drilling them would be the easiest thing I think.

That's hawt! Doesnt look like for an nv4500 tho

I picked up some giant stainless roll pins from Ace and was planning to cut them down to fit tight, adding epoxy is a great idea! The Hurst shifter really is a must!

I thought it came loose again already but it was just the 2 bolts that mount the shift level to the shifter base, I never lock tited them and they dint fare well to bang shifting.

Those holes look like they're for a socket head cap screw:

Is that what you're using? Or am I not accurately picturing how the arrangement is set up?

 

[Dantheman1540]

Those holes look like they're for a socket head cap screw:

View attachment 350122


Is that what you're using? Or am I not accurately picturing how the arrangement is set up?

I see what you're saying but no the rubber isolator goes between the trans and shifter. The shifter only has space for the bolt threads to go through and I use flange head grade 8 bolts.

 

[George B]

you could use aluminum too. Just add gasket maker on both sides.