The Ford Barn

Doug · 02-28-2015, 06:54 PM

I have a 1939-48 transmission main drive gear and second speed gear. The synchronizer teeth on both gears are worn/chipped.

Questions:
1) How does the worn/chip gear issue affect the operation of the transmission?
2) How bad can the wear/chip be before it affects the operation?

Thanks

AnthonyG · 02-28-2015, 07:10 PM

Time to rebuild. If your syncros are worn your gonna start grinding a lot of gears shifting unless you become very adept at double clutching. One day you'll miss and bust the main drive gear or more.

Kube · 02-28-2015, 07:13 PM

Quote:

Originally Posted by Doug

I have a 1939-48 transmission main drive gear and second speed gear. The synchronizer teeth on both gears are worn/chipped.

Questions:
1) How does the worn/chip gear issue affect the operation of the transmission?
2) How bad can the wear/chip be before it affects the operation?

Thanks

Considering the very reasonable cost of replacing these pieces, I see little "question"... replace them.

svm99 · 02-28-2015, 08:46 PM

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The worn teeth on these 2 gears will cause the brass synchro rings to wear sooner than later, will seem Ok at first with new synchros but will eventually show up.

At the cost of a good cluster gear (when you can find one) I wouldn't take a chance with marginal gears. These 2 gears are reasonably easy to find at a fair price. The 2nd gear synchro teeth on some gears may appear chipped when actually the teeth are slightly cut when the gear is made on a gear hob.

Photos of the gears would help us Ford Barners in our analysis.
Thanks Paul J.

02-28-2015, 06:54 PM	#1
Doug Senior Member Join Date: May 2010 Location: Central Texas Posts: 151	1939-48 Trans. Gear Condition Question I have a 1939-48 transmission main drive gear and second speed gear. The synchronizer teeth on both gears are worn/chipped. Questions: 1) How does the worn/chip gear issue affect the operation of the transmission? 2) How bad can the wear/chip be before it affects the operation? Thanks

02-28-2015, 07:10 PM	#2
AnthonyG Senior Member Join Date: May 2013 Location: Pa. Posts: 2,227	Re: 1939-48 Trans. Gear Condition Question Time to rebuild. If your syncros are worn your gonna start grinding a lot of gears shifting unless you become very adept at double clutching. One day you'll miss and bust the main drive gear or more. __________________ Nomad

02-28-2015, 08:46 PM	#4
svm99 Senior Member Join Date: May 2010 Location: Garlic Country of CA Posts: 565	Re: 1939-48 Trans. Gear Condition Question Sponsored Links (Register now to hide all advertisements) The worn teeth on these 2 gears will cause the brass synchro rings to wear sooner than later, will seem Ok at first with new synchros but will eventually show up. At the cost of a good cluster gear (when you can find one) I wouldn't take a chance with marginal gears. These 2 gears are reasonably easy to find at a fair price. The 2nd gear synchro teeth on some gears may appear chipped when actually the teeth are slightly cut when the gear is made on a gear hob. Photos of the gears would help us Ford Barners in our analysis. Thanks Paul J.