damn battery is nuts

[programmasters]

hi,

sorry 'bout the title but it pertains to the battery and the rubber grommets/nuts that hold the tray in place. I recently had my second gear go out on me so I replaced my tranny and saw that the two rear rubber bolts were not sscrewed in because the thread on the tranny was worn out, so I thought, yes, with my new secondhand tranny that problem is fixed, however when installing my secondhand tranny, i noticed that the threads were also worn out.

How could I proceed and what do you guys think?

1. Tap a new thread that is bigger into the tranny, bu then the rubber nuts will not be able to screw into the new thread(because it is obviously bigger than the original thread)
2. just hold the battery in place with 2 of the 4 nuts(dangerous when braking as the momentum will lift the battery) but do not care
3. Lengthen the grommets/nuts by welding a piece of nut on the end of the nut, and securing it with a bolt(but will the bolt not hit the hasuing for the drive shaft)
4. weld the grommets to the tranny( but how do i remover the battery tray later when i cannot turn the grommets anymore)
5. Another idea?

Hope anybody has an idea or a best idea out of the choices above?
(i am guessing that is a fairly common problem as the two tranny's i have owned and own both have this problem, but i do not seem to be able to find an answer)

[pallum]

I had two of mine break while transferring them to a new transmission once :(



Found some rubber furniture feet at Home Depot:


Melted a hole through the centers of 4 of them with a hot nail:


Drilled and tapped the holes up to M6:


Had to trim a bit off the diameters so they would all fit, but stacked them up to roughly the same height as the OEM hardware:


Bolted them on, and haven't touched them in a year!

[Inge K.]

Another (and more expensive) alternative would be thread inserts.

[johnny]

industrial hook n loop velcro...

j p

[wmax351]

Or JB weld and a drill and tap. They aren't exactly highly stressed. If you have the thread inserts handy, the helicoils are cheap, it's the tap and insert too that costs a bit.

[programmasters]

I like pallums idea, it is very diy/mcgyver :2thumbup: but the original rubbers would allow the battery to flex up and down, whilst with your idea they would only be able to compress the rubber(so flex down). But as I said I like it and you said they where holding strong for over a year already. So it is definitely an option.

However tapping a bigger hole and then inserting a helicoil wil some threadlocker on the coil and then just screwing in the original rubbers, because those are still like new and I have a tap and inserts lying around. So I think I will go with wmax351's plan and if that does not work out, I will go with the first option.

Thanks guys for your help, it is much appreciated. :2thumbup: see you on the road