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Roch2nite · 05-28-2006, 10:33 PM

I have two GM vehicles, 87 C10 and 86 Caprice that both shift into high too soon. They don't seem to downshift unless I press the gas to the floor almost. Then they shift back to high when I let off the gas. The engine starts pinging a little since its being stressed to pull the car in a high gear. I notice this on back roads when I'm doing around 40 - 45 mph. I'm not in overdrive when this happens. The truck has 101K miles and the car has 74K so I don't think its a tranny overhaul, but I once had a 85 Old SW that did the same thing, but it had 155K and I blamed it on a slipping tranny. I check the fluid level and even change the trans filters and fluid, without any change. I'm hopping it only a adjustment or something minor. Any Transmission gurus out there?

Anyone have any ideas on this one????

Thanks,
Larry

05-28-2006, 10:33 PM	#1
Roch2nite Registered User Join Date: May 2006 Location: Pennsylvania Posts: 1	700R4 transmission shifting too soon I have two GM vehicles, 87 C10 and 86 Caprice that both shift into high too soon. They don't seem to downshift unless I press the gas to the floor almost. Then they shift back to high when I let off the gas. The engine starts pinging a little since its being stressed to pull the car in a high gear. I notice this on back roads when I'm doing around 40 - 45 mph. I'm not in overdrive when this happens. The truck has 101K miles and the car has 74K so I don't think its a tranny overhaul, but I once had a 85 Old SW that did the same thing, but it had 155K and I blamed it on a slipping tranny. I check the fluid level and even change the trans filters and fluid, without any change. I'm hopping it only a adjustment or something minor. Any Transmission gurus out there? Anyone have any ideas on this one???? Thanks, Larry Last edited by Roch2nite; 05-28-2006 at 10:35 PM.