Gearbox components

beetlek · Samba Member Joined: August 04, 2009 Posts: 45

Hi,

I have a gearbox with a broken ring and pinion.
Broken one is a swing type gearbox with new clutch(and clutch sleeve).
For parts I have older swing box(with older clutch bearing).
Can I swap all content of older box to newer case?
Or just swap ring and pinion from older to new?

Thanks you

mark tucker · Posted: Sun Jul 24, 2016 8:33 am Post subject: Re: Gearbox components

possibly.but unless you have all the tools&know how you would be better sending it off to somebody to do it that knows how and has a good reputation for such work.

Bruce · Posted: Sun Jul 24, 2016 12:29 pm Post subject: Re: Gearbox components

How did the R&P break? Teeth stripped off the pinion? If so, your case is junk.
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beetlek · Samba Member Joined: August 04, 2009 Posts: 45

Had a weird noice coming from gearbox so opened it and result:

Sorry I cant resize picture from my phone.

Image may have been reduced in size. Click image to view fullscreen.

Starbucket · Posted: Sun Jul 24, 2016 2:16 pm Post subject: Re: Gearbox components

Looks like someone tried to burn rubber in reverse a big no-no as the pinion will climb with no support and case will give way and teeth will chew them selves to junk.

SOLiiD · Posted: Sun Jul 24, 2016 6:57 pm Post subject: Re: Gearbox components

ashman40 · Posted: Sun Jul 24, 2016 8:35 pm Post subject: Re: Gearbox components

olspeed · Posted: Mon Jul 25, 2016 1:08 am Post subject: Re: Gearbox components

beetlek · Samba Member Joined: August 04, 2009 Posts: 45

Or maybe it was put together badly.
I know 100% there have been no burnouts.

Bruce · Posted: Mon Jul 25, 2016 11:26 pm Post subject: Re: Gearbox components

I don't think reverse has anything to do with that failure. When drag racers break the pinion teeth, the cracks always start at the end of the tooth nearest the bearing, just like in the pic.

It is possible to swap an early 60s 4.37 R&P into your late gearbox, but you need to know what parts are also needed to make the swap work. Your newer diff will have 8 bolts on the ring gear. The older ring gear has 6. That means you have to use the early diff housing.

When you swap the R&P and the diff housing, you have to set the pinion depth, then the diff bearing preload, then the ring gear backlash.

Can you handle that?

Easier is to get a late 8 bolt 4.37 R&P. Then it fits into your late trans without needing to swap a bunch of other parts to make it work. You won't have to set the diff bearing preload since you'll be using the gearbox's original diff, but you will need to do the pinion depth and ring gear backlash.
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beetlek · Samba Member Joined: August 04, 2009 Posts: 45

Can I swap these parts? Has anybody tried?
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