The Ford Barn

Fatheads4ever · 06-07-2022, 08:47 PM

Hi gents and others.. for decades my transmission has gone boing when changing direction especially to reverse. It happens when the clutch is released. A friend's truck does the same thing.

I've recently rebuilt the gearbox but it still does it. Can't tell if it's coming from the diff or gearbox.

Any ideas anyone?

Regards Kevin

Zeke3 · 06-07-2022, 09:03 PM

Kevin, I have a non-Ford car that had a squeak like noise that turned out to be the splined connection between the axle and a universal joint. I am thinking your noise might be the splined connector between the drive shaft and the pinion shaft at the differential. There was a picture on here not very long ago that showed excessive wear on a splined coupling. Good luck with your search.

Graeme / New Zealand · 06-08-2022, 01:32 AM

Quote:

Originally Posted by Fatheads4ever

Hi gents and others.. for decades my transmission has gone boing when changing direction especially to reverse. It happens when the clutch is released. A friend's truck does the same thing.

I've recently rebuilt the gearbox but it still does it. Can't tell if it's coming from the diff or gearbox.

Any ideas anyone?

Regards Kevin

Kevin you might find your answer here.

https://www.youtube.com/watch?v=uNsyQDmEopw

GB

Fatheads4ever · 06-08-2022, 01:35 AM

Interesting.. there is a splined connection from the tail shaft of the gearbox to the universal. I think that coupling is lubed from the gearbox. I might change the gearbox oil from ep90 to 600 and pack the universal's internal spline with a hard grease.
Thank you for your feedback.

Terry,OH · 06-08-2022, 06:46 AM

Is "boing" a tech term?? Maybe you can explain in more detail what is happening. Did you rebuild the shift mechanism? Is the transmission jumping out of gear?
Do NOT use 600 in your transmission. You can use 0-0 in the U-joint housing about 6 OZ. The U-joint does need lubrication, but it does not get it through the rear bearing. You can add lube through the speedometer turtle by removing from the torque tube.

pistonbroke · 06-08-2022, 10:17 AM

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Is the vehicle in question the 42 thru 47 pickup in your member sign on? If so I would check your slip joint at the front of the drive shaft and the pinion shaft for play. Tim

Fatheads4ever · 06-08-2022, 05:37 PM

Hi Terry.. I installed new bearings, synchro cones, good synchro sleeve and replaced 2nd gear. Selectors are the same. It used to jump out of 2nd but not any more.
The boing noise sounds more like a bell. Only does it when changing direction. It did it before the rebuild..

Fatheads4ever · 06-08-2022, 08:07 PM

Will do thanks Tim.

Fatheads4ever · 06-08-2022, 09:47 PM

Quote:

Originally Posted by Graeme / New Zealand

Kevin you might find your answer here.

https://www.youtube.com/watch?v=uNsyQDmEopw

GB

Hahaha boing boing

swedishsteel · 06-08-2022, 10:26 PM

my guess would be a u joint

06-07-2022, 08:47 PM	#1
Fatheads4ever Member Join Date: May 2021 Location: Auckland New Zealand Posts: 48	Transmission goes 'boing' Hi gents and others.. for decades my transmission has gone boing when changing direction especially to reverse. It happens when the clutch is released. A friend's truck does the same thing. I've recently rebuilt the gearbox but it still does it. Can't tell if it's coming from the diff or gearbox. Any ideas anyone? Regards Kevin

06-07-2022, 09:03 PM	#2
Zeke3 Senior Member Join Date: Dec 2014 Location: Columbus, IN Posts: 1,406	Re: Transmission goes 'boing' Kevin, I have a non-Ford car that had a squeak like noise that turned out to be the splined connection between the axle and a universal joint. I am thinking your noise might be the splined connector between the drive shaft and the pinion shaft at the differential. There was a picture on here not very long ago that showed excessive wear on a splined coupling. Good luck with your search.

06-08-2022, 01:35 AM	#4
Fatheads4ever Member Join Date: May 2021 Location: Auckland New Zealand Posts: 48	Re: Transmission goes 'boing' Interesting.. there is a splined connection from the tail shaft of the gearbox to the universal. I think that coupling is lubed from the gearbox. I might change the gearbox oil from ep90 to 600 and pack the universal's internal spline with a hard grease. Thank you for your feedback.

06-08-2022, 06:46 AM	#5
Terry,OH Senior Member Join Date: May 2010 Posts: 4,750	Re: Transmission goes 'boing' Is "boing" a tech term?? Maybe you can explain in more detail what is happening. Did you rebuild the shift mechanism? Is the transmission jumping out of gear? Do NOT use 600 in your transmission. You can use 0-0 in the U-joint housing about 6 OZ. The U-joint does need lubrication, but it does not get it through the rear bearing. You can add lube through the speedometer turtle by removing from the torque tube.

06-08-2022, 10:17 AM	#6
pistonbroke Senior Member Join Date: Feb 2021 Location: Perry Mo. Posts: 481	Re: Transmission goes 'boing' Sponsored Links (Register now to hide all advertisements) Is the vehicle in question the 42 thru 47 pickup in your member sign on? If so I would check your slip joint at the front of the drive shaft and the pinion shaft for play. Tim

06-08-2022, 05:37 PM	#7
Fatheads4ever Member Join Date: May 2021 Location: Auckland New Zealand Posts: 48	Re: Transmission goes 'boing' Hi Terry.. I installed new bearings, synchro cones, good synchro sleeve and replaced 2nd gear. Selectors are the same. It used to jump out of 2nd but not any more. The boing noise sounds more like a bell. Only does it when changing direction. It did it before the rebuild..

06-08-2022, 08:07 PM	#8
Fatheads4ever Member Join Date: May 2021 Location: Auckland New Zealand Posts: 48	Re: Transmission goes 'boing' Will do thanks Tim.

06-08-2022, 10:26 PM	#10
swedishsteel Senior Member Join Date: Jan 2011 Posts: 342	Re: Transmission goes 'boing' my guess would be a u joint