The Ford Barn

Twrench~70 · 08-13-2022, 08:05 PM

I was wondering what difference there is between a 60hp transmission and a 85hp transmission? wanting to swap out motor only if I can get away with it. Thanks

Lawson Cox · 08-13-2022, 09:04 PM

I'm no expert by any means but I believe that all will bolt together but the 60HP transmission has a solid casting to protect/cover the starter bendix where the 85HP has the tin can. I'm often wrong, but never in doubt.

Mac VP · 08-14-2022, 05:59 AM

The stock 1937-39 V8-60 transmission (as used in the passenger cars) was a very light duty unit. Everything inside the gearbox is smaller…..the gears, the bearings, the shafts…..everything! So it’s reasonable to assume that even if you can work out the clutch spline problem, this unit would not hold up to the additional power and torque of the 85hp engine for very long.

nickthebandit · 08-14-2022, 07:12 AM

Doesn't the v-8 60 commercial transmission have the same gears as the bigger V-8 engines ?

rotorwrench · 08-14-2022, 12:11 PM

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From information I've looked at in the 1938 through 1941 Ford & Mercury chassis parts & price list, there appears to be three different cases made for the V8 60 applications. The 73-7005 was for V8 60 apps in 1938 through part of 1940 and these were commercial applications. The 74-7005 case was for passenger car applications in 1938 & 39 and this is likely the "little" case. The 022A-7005 was for all V8 60 applications in 1940 that used the remote control shift with a side shift housing. This likely included some commercial applications. The 3 on the tree is not common for commercials but was used in that time frame for both commercial and passenger car applications.

The 022A input & cluster were a 15/29 set of gears that were used for some V8 60 applications that had helical gears but they were also used in Mercury cars so there was interchangeability to get this ratio for any application where it was needed. I have a 15/29 set that came from a 1940 Mercury. It works well with a taller rear axle ratio on light bodied cars.

The "little 74" case transmission had it's own "74 prefix" gears and they were still spur type. The "67 prefix" gears were used for V8 60 applications in the commercial case and they were part helical & part spur type gears. These were used in some applications beginning in 1936 and were carried through 1939. The 1940 case would have had the 022A type input gearing.

08-13-2022, 08:05 PM	#1
Twrench~70 Junior Member Join Date: Jan 2020 Posts: 15	transmission difference 60hp to 85hp I was wondering what difference there is between a 60hp transmission and a 85hp transmission? wanting to swap out motor only if I can get away with it. Thanks

08-13-2022, 09:04 PM	#2
Lawson Cox Senior Member Join Date: May 2010 Location: Above the gnat line in Georgia Posts: 7,009	Re: transmission difference 60hp to 85hp I'm no expert by any means but I believe that all will bolt together but the 60HP transmission has a solid casting to protect/cover the starter bendix where the 85HP has the tin can. I'm often wrong, but never in doubt. __________________ Life is like a roll of toilet paper. The closer to the end, the faster it goes. It is better to be seen, than viewed. "We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm".

08-14-2022, 05:59 AM	#3
Mac VP Senior Member Join Date: May 2010 Location: Cincinnati, OH Posts: 1,361	Re: transmission difference 60hp to 85hp The stock 1937-39 V8-60 transmission (as used in the passenger cars) was a very light duty unit. Everything inside the gearbox is smaller…..the gears, the bearings, the shafts…..everything! So it’s reasonable to assume that even if you can work out the clutch spline problem, this unit would not hold up to the additional power and torque of the 85hp engine for very long. __________________ VANPELT SALES LLC Cincinnati, Ohio Office: 513-724-9486 www.vanpeltsales.com www.classictransmission.com

08-14-2022, 07:12 AM	#4
nickthebandit Senior Member Join Date: May 2010 Location: Shippensburg, pa. Posts: 416	Re: transmission difference 60hp to 85hp Doesn't the v-8 60 commercial transmission have the same gears as the bigger V-8 engines ?

08-14-2022, 12:11 PM	#5
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: transmission difference 60hp to 85hp Sponsored Links (Register now to hide all advertisements) From information I've looked at in the 1938 through 1941 Ford & Mercury chassis parts & price list, there appears to be three different cases made for the V8 60 applications. The 73-7005 was for V8 60 apps in 1938 through part of 1940 and these were commercial applications. The 74-7005 case was for passenger car applications in 1938 & 39 and this is likely the "little" case. The 022A-7005 was for all V8 60 applications in 1940 that used the remote control shift with a side shift housing. This likely included some commercial applications. The 3 on the tree is not common for commercials but was used in that time frame for both commercial and passenger car applications. The 022A input & cluster were a 15/29 set of gears that were used for some V8 60 applications that had helical gears but they were also used in Mercury cars so there was interchangeability to get this ratio for any application where it was needed. I have a 15/29 set that came from a 1940 Mercury. It works well with a taller rear axle ratio on light bodied cars. The "little 74" case transmission had it's own "74 prefix" gears and they were still spur type. The "67 prefix" gears were used for V8 60 applications in the commercial case and they were part helical & part spur type gears. These were used in some applications beginning in 1936 and were carried through 1939. The 1940 case would have had the 022A type input gearing.