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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Nov 2014 Posts: 5 New Guy | | New Guy Joined: Nov 2014 Posts: 5 | anyone ever use one of the old brownie overdrive transmissions? thing about mounting one behind my transmission now . if there is any left around | | | | | Joined: Feb 2004 Posts: 29,840 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,840 | They come up on Ebay pretty often- - - -usually the BIG ones that were used on heavy trucks. Be aware they use non-synchronized gearing, so shifting one on the fly can be a challenge. I learned to drive trucks on a B-73 Mack with a 5 X 3 transmission setup, and after a while I could run all 15 gears without using the clutch except to start and stop. If you're considering using a Brownie in a truck smaller than about a 2 ton, you'll have a big problem adapting the driveline yokes to the small U joints smaller trucks use- - - -custom made drivelines to both ends of the Brownie.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Nov 2014 Posts: 5 New Guy | | New Guy Joined: Nov 2014 Posts: 5 | have a gmc 9500 chassis 5sp and 2 would like the overdrive .it has the heavier drive line in it | | | | | Joined: Feb 2004 Posts: 29,840 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,840 | It sounds like you're on the right track. I've got a 1961 American LaFrance pumper with the 401 V6 and a 5 speed Clark with direct drive in 5th. I'm planning to remove the fire bed and the driveline-mounted pump and replace the pump with an under/direct/over Brownie. I'll have a good lowboy towing tractor that way, with a gooseneck trailer hitch incorporated just aft of the 5th. wheel.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Nov 2014 Posts: 5 New Guy | | New Guy Joined: Nov 2014 Posts: 5 | lowered frame putting 64 gmc 4000 cab onit lowered cab to 671 detroit power | | | | | Joined: Jan 2008 Posts: 4,962 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,962 | I'm not sure I understand just what you are doing, but if you have a 9500 series with a 671 with a 5 and 2, you don't need any more gears. If it doesn't go fast enough, faster 2 speeds are hard to find. I would recommend going to a single speed axle out of a modern truck with a 10 speed transmission. You can then get the exact ratios you want. How fast are you planning on going. We used to gear Detroits to run the desired speed at 21 or 2200 and then set the governor at about 2400. Don't ever let it get below 1800. | | | | | Joined: Nov 2014 Posts: 5 New Guy | | New Guy Joined: Nov 2014 Posts: 5 | too expensive to switch this truck has a push clutch with the small bellhousing and flywheel | | |
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