My C60's SM420 transmission had a factory input shaft seal, now it has a modern neoprene seal. However it's the two ton input shaft and it's a '65, so maybe they treated those better. I just wish it had the backup light fitting/switch. That seems to have debuted in '67.
Last edited by Dusty53; 09/15/20256:17 PM. Reason: change Title to refelect post question
Last edited by Dusty53; 09/15/20256:16 PM. Reason: change Title to refelect post question
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12 '52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
I've never owned a vehicle that had backup lights that actually illuminated anything well enough to assist reversing at night.
1950 Chevrolet 3100 (Ol' Roy) 1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1956 Cadillac Sixty Special Fleetwood (The Godfather) | 1966 Oldsmobile Toronado (The Purple Knif) | 1966 Ford Mustang (Little Red) | 1964 Ford Galaxie 500 coupe | 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
I was referring to factory installed reverse lights. None of them do anything to improve visibility at night while reversing.
What do you do if you want to install a hitch? Does that light just pull out?
1950 Chevrolet 3100 (Ol' Roy) 1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1956 Cadillac Sixty Special Fleetwood (The Godfather) | 1966 Oldsmobile Toronado (The Purple Knif) | 1966 Ford Mustang (Little Red) | 1964 Ford Galaxie 500 coupe | 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
I always wondered if I could do that, it doesn't seem hugely complex. Maybe they could sell me the switch and I could figure the rest out myself.
The switch is common. I broke mine and the local auto parts store had it. ISTR someone installing their own switch in a pre-1967 transmission - maybe search the forums.
Backup lights are a great safety feature; not just for night driving. Last week, I was in a parking lot getting ready to back up when I saw the backup lights on the car behind me come on. I waited for the guy to leave.
My '50 Chevy 3100 5 window, '62-235cu, 3:55 rear My truck ....... Respect The Rust If I'm not working on my truck, '65 m00stang or VW camper, I'm fishing with the wife or smoking Salmon.
On the early SM 420s there was a lever arm that attached to the shift handle that depressed a simple 2-wire push button switch to operate backup lights. It would be a very easy project to fabricate one of those from parts available at the local hardware store. I've used a pair of fog/driving lights attached to a rear bumper to make VERY efficient backup lights. A push button wired into that circuit was also effective at getting tailgaters to back off a little! 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!
