NV3500 Tailshaft (extension housing) Bushing?

6810 Views 6 Replies 3 Participants Last post by ReadyXB, Oct 13, 2015

ReadyXB

Discussion Starter · Sep 19, 2014

I am here out of desperation. I have searched high and low for a replacement extension housing (tailshaft) bushing for my NV3500 transmission. This is the bushing in the tail of the transmission that the driveshaft slide yoke goes into.

- GM Parts shows it as discontinued with no part#.
- Cobra Transmission website showed what I think is the correct bushing, but I called them and they don't have it and can't get it.
- Drivetrain Parts Las Vegas showed a price, but I called and they don't have it. The guy also called several warehouses and they couldn't get it either.

There are only a handful of other websites that show up as a google result for the possible part numbers and none of them show it in stock or even with a price.

Possible part numbers are: 290-62A or 404066A
Dimensions: ID: 1.501", OD: 1.63", Width: 1.375"

So, has anyone replaced their bushing, and if so, where did you get it???
Thanks.

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ReadyXB

Discussion Starter · #2 · Sep 24, 2014

Well I must be the only one on the forum needing this bushing, lol, but here's an update.

As mentioned previously, finding the correct bushing seemed almost futile as I could find no one that stocked it or could get it.

After much searching, I ran across GM bushing# 6260048. It has the same ID and OD as the correct bushing but is not as wide, so I bought two and plan to "sandwich" them together in the tailshaft and then cut off the excess. Actually, I will trim the second bushing to size before pressing it in, but you get the idea. Any reason why this wouldn't work?

Photo Left: old, factory bushing | Right: new bushings that will be stacked to make one:

I will align the oil valleys relative to each other in the two new bushings to ensure adequate lubrication.

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greasemonkeys10

· #3 · Sep 26, 2014

I thought you had to split the tranny case to remove the bushing from the tail shaft?

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ReadyXB

Discussion Starter · #4 · Sep 30, 2014

greasemonkeys10 said:
I thought you had to split the tranny case to remove the bushing from the tail shaft?

Yes, that's correct. My transmission is completely disassembled and I didn't want to re-use the existing bushing. The bushing on the left is the one I removed.

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ReadyXB

Discussion Starter · #5 · Oct 1, 2014

I was able to cut the second bushing's width to size with a hacksaw and dremel cut-off wheel. The dremel worked better, but a band saw would have been ideal.

I applied Permatex Sleeve Retainer to the outside of both bushings.

Then I drove the first bushing that I cut, the narrower of the two, into the housing. Here is a pic showing the first bushing installed, and I'm just starting to drive in the second full-size/uncut bushing:

I am using a camshaft bearing tool to drive in the bushings. Works perfectly.

And here both bushings are installed. Note the alignment of the oil valleys between the two bushings, which must be done before pressing the second one in.

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Jersey_Boy_Customs

· #6 · Sep 30, 2015

ReadyXB said:
Well I must be the only one on the forum needing this bushing, lol, but here's an update.

As mentioned previously, finding the correct bushing seemed almost futile as I could find no one that stocked it or could get it.

After much searching, I ran across GM bushing# 6260048. It has the same ID and OD as the correct bushing but is not as wide, so I bought two and plan to "sandwich" them together in the tailshaft and then cut off the excess. Actually, I will trim the second bushing to size before pressing it in, but you get the idea. Any reason why this wouldn't work?

Photo Left: old, factory bushing | Right: new bushings that will be stacked to make one:

I will align the oil valleys relative to each other in the two new bushings to ensure adequate lubrication.

Where di you get these!? I'm currently rebuild my NV3500 also and had the same issue of not finding the bushing

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ReadyXB

Discussion Starter · #7 · Oct 13, 2015

I bought those two on ebay. The total with shipping was $10.73.

I just did a quick ebay search (#6260048) and there are several sellers who have them.

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