New overdrive ?
Burning Brakes
Joined: Jan 2007
Posts: 921
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From: Houston TX
Thread Starter
Instructor
Joined: May 2006
Posts: 242
Likes: 0
From: BURTON MI
Thanks for the answers the Vet is going in the shop hpoefully this week. I am getting the drivers side window regualator upgraded and the Mechanic is going to check out the OD.
Thanks,
Hugh
Thanks,
Hugh
Racer
Joined: Sep 2004
Posts: 389
Likes: 0
From: Sayreville New Jersey
according to this website, which i found about a year ago a '84 has to hit 176 degrees before OD kicks in http://www.5speeds.com/43table.htm it says my '87 has to hit 122 for the OD to engage and that's exactly what it does...
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Michael S. Palmer
Team Owner
Joined: May 2002
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Minimum coolant temp for overdrive to come on:
84... 176F
85... 140F
86+...122F
The overdrive dash light is wired to the same circuit as the overdrive. It only goes on when the computer is trying to turn on the overdrive.
Gear, speed, coolant temp, and overdrive enable switch are just inputs. The computer decides based on all those inputs. The temp you see on the dash vs. the temp the computer sees are from different sensors, so ~5 degrees of error is normal.
If you're Canadian, turn the English/metric switch to english mode to see what those temps translate to. If you only speak French, then you're on your own.
84... 176F
85... 140F
86+...122F
The overdrive dash light is wired to the same circuit as the overdrive. It only goes on when the computer is trying to turn on the overdrive.
Gear, speed, coolant temp, and overdrive enable switch are just inputs. The computer decides based on all those inputs. The temp you see on the dash vs. the temp the computer sees are from different sensors, so ~5 degrees of error is normal.
If you're Canadian, turn the English/metric switch to english mode to see what those temps translate to. If you only speak French, then you're on your own.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
One reason to never ever run a 160 stat in a '84 4+3.
Even the 180F thermostat is too close for comfort. And the high flow stats tend to open a little earlier than advertised.
Even the 180F thermostat is too close for comfort. And the high flow stats tend to open a little earlier than advertised.
Thread Starter
Instructor
Joined: May 2006
Posts: 242
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From: BURTON MI
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
Minimum coolant temp for overdrive to come on:
84... 176F
85... 140F
86+...122F
The overdrive dash light is wired to the same circuit as the overdrive. It only goes on when the computer is trying to turn on the overdrive.
Gear, speed, coolant temp, and overdrive enable switch are just inputs. The computer decides based on all those inputs. The temp you see on the dash vs. the temp the computer sees are from different sensors, so ~5 degrees of error is normal.
If you're Canadian, turn the English/metric switch to english mode to see what those temps translate to. If you only speak French, then you're on your own.
84... 176F
85... 140F
86+...122F
The overdrive dash light is wired to the same circuit as the overdrive. It only goes on when the computer is trying to turn on the overdrive.
Gear, speed, coolant temp, and overdrive enable switch are just inputs. The computer decides based on all those inputs. The temp you see on the dash vs. the temp the computer sees are from different sensors, so ~5 degrees of error is normal.
If you're Canadian, turn the English/metric switch to english mode to see what those temps translate to. If you only speak French, then you're on your own.
The fact that your OD unit works sometimes may be due to a loose wire at the connector to the OD relay or possibly the wire going into the OD case. These are common areas for OD problems especially when the OD unit does work even if it's sporadic
Drifting
Joined: Oct 2006
Posts: 1,694
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From: Beaverton Oregon
