way high cruise rpm
08-20-2013, 12:21 AM
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way high cruise rpm Ever since I got the car the rpms for cruise seem unusually high even for the 3.73 gears it's supposed to have. Its turning like 3000 rpm at 70 mph. It's killing my gas mileage. When I give it gas the rpms jump past 3500 like the converter is unolcked.
08-20-2013, 12:09 PM
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My rpms run exactly like your 4.56 gears but I really don't think that's what's in there, the previous owner said he put in 3.73's.
What exactly am I scanning for, and would the monkeys at advance be able to do it? It's a 94 lt1 if that means anything
What exactly am I scanning for, and would the monkeys at advance be able to do it? It's a 94 lt1 if that means anything
08-20-2013, 12:58 PM
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08-21-2013, 08:18 PM
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I recall a similar thread in which I calculated that the OP had a 4.11 and not the 3.73 he claimed; the OP then confirmed he indeed had a 4.11. You might want to confirm it too.
As stated, it is clearly not locking up. A scan might tell you why.
As stated, it is clearly not locking up. A scan might tell you why.
08-23-2013, 01:27 AM
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The fans come on and off at about 170 or 180 so its about right.
I'm thinking that it might actually have 4.11s based on how high the rpms are but the torque converter isn't locking for sure so I'm trying to find a place around here to scan it that isn't a dealer.
I'm not really sure what all conditions cause the tcc to lock up so I'm not sure what signs to look for without a scanner right now, until I can get it somewhere thatll do it for free.
I'm thinking that it might actually have 4.11s based on how high the rpms are but the torque converter isn't locking for sure so I'm trying to find a place around here to scan it that isn't a dealer.
I'm not really sure what all conditions cause the tcc to lock up so I'm not sure what signs to look for without a scanner right now, until I can get it somewhere thatll do it for free.
Last edited by savage388; 08-23-2013 at 01:34 AM.
08-23-2013, 10:21 AM
#13
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Many auto stores will let you scan for free in their parking lot. Or take it home as a free rental for a few days after paying $300-$400 deposit.
Jack up the rear wheels, engine off, put the trans in Neutral, mark the rear tires and count how many turns of the driveshaft it takes to turn the tires one rotation. That is your rear end ratio.
Jack up the rear wheels, engine off, put the trans in Neutral, mark the rear tires and count how many turns of the driveshaft it takes to turn the tires one rotation. That is your rear end ratio.
09-17-2013, 12:56 PM
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Many auto stores will let you scan for free in their parking lot. Or take it home as a free rental for a few days after paying $300-$400 deposit.
Jack up the rear wheels, engine off, put the trans in Neutral, mark the rear tires and count how many turns of the driveshaft it takes to turn the tires one rotation. That is your rear end ratio.
Jack up the rear wheels, engine off, put the trans in Neutral, mark the rear tires and count how many turns of the driveshaft it takes to turn the tires one rotation. That is your rear end ratio.
09-17-2013, 05:01 PM
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09-20-2013, 07:50 PM
#17
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Tell the OP what you paid to get your gears changed.
09-21-2013, 12:39 AM
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Tell us where you are located. Perhaps someone can then recommend an experienced mechanic that could swap gears for you. You "might" be able to buy used gears for $150, get them installed for $250 and sell your old gears for $100 for a net cost of $300.
Tell the OP what you paid to get your gears changed.
Tell the OP what you paid to get your gears changed.
09-21-2013, 06:46 AM
#19
When I had 4.56s',loved em.
Ran them from the fall of 2007 to the spring of 2012. 1st and 2nd gear were wicked. Still had a top speed of 140. Took 4 trips from Ohio to Florida with them,mpg was 21.5 at freeway legal speeds,the computor handled the mpg well. On a return trip once on I26 from I95 to I77,hooked up with a fast moving group of cars and was in cruise control for an hour at 4000rpm.
Ran them from the fall of 2007 to the spring of 2012. 1st and 2nd gear were wicked. Still had a top speed of 140. Took 4 trips from Ohio to Florida with them,mpg was 21.5 at freeway legal speeds,the computor handled the mpg well. On a return trip once on I26 from I95 to I77,hooked up with a fast moving group of cars and was in cruise control for an hour at 4000rpm.
09-21-2013, 09:45 PM
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When I had 4.56s',loved em.
Ran them from the fall of 2007 to the spring of 2012. 1st and 2nd gear were wicked. Still had a top speed of 140. Took 4 trips from Ohio to Florida with them,mpg was 21.5 at freeway legal speeds,the Don't utor handled the mpg well. On a return trip once on I26 from I95 to I77,hooked up with a fast moving group of cars and was in cruise control for an hour at 4000rpm.
Ran them from the fall of 2007 to the spring of 2012. 1st and 2nd gear were wicked. Still had a top speed of 140. Took 4 trips from Ohio to Florida with them,mpg was 21.5 at freeway legal speeds,the Don't utor handled the mpg well. On a return trip once on I26 from I95 to I77,hooked up with a fast moving group of cars and was in cruise control for an hour at 4000rpm.
