Today I went to fill my truck with fuel, all was well to the service station (4 Miles), on the way back home, I was going about 70 MPH, I accelerated, I had a downshift, and reached 80 MPH, that is when the engine revved up as if it was in neutral, I let off, speed dropped to about 75 MPH, I accelerated again, trans acted like it went in neutral again. I slowed down to 60 MPH without any problem accelerating. I got off the interstate, took a highway, and drove 2 miles at 60 MPH, I noticed my truck didn't seem to go into overdrive. I was traveling at 60 MPH with the tach showing 2500 RPM, so I knew it isn't in overdrive. I cycled switch twice to lock out tow mode, and overdrive mode, with no changes. Trans temp was less than 150 degrees, and I am pretty sure my tach use to read about 1900 RPM's @ 60 MPH. I checked the fluid level while hot all was normal. I have a Sonnax trans line pressure booster installed for about 5,000 miles now. I have 71,900 miles on my truck. SC Performance 91 Octane tune installed. Is this something major, or do I have a minor problem?
2007 Dodge Ram 1500 QC Trans. problem
SUPER BEE
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Today I went to fill my truck with fuel, all was well to the service station (4 Miles), on the way back home, I was going about 70 MPH, I accelerated, I had a downshift, and reached 80 MPH, that is when the engine revved up as if it was in neutral, I let off, speed dropped to about 75 MPH, I accelerated again, trans acted like it went in neutral again. I slowed down to 60 MPH without any problem accelerating. I got off the interstate, took a highway, and drove 2 miles at 60 MPH, I noticed my truck didn't seem to go into overdrive. I was traveling at 60 MPH with the tach showing 2500 RPM, so I knew it isn't in overdrive. I cycled switch twice to lock out tow mode, and overdrive mode, with no changes. Trans temp was less than 150 degrees, and I am pretty sure my tach use to read about 1900 RPM's @ 60 MPH. I checked the fluid level while hot all was normal. I have a Sonnax trans line pressure booster installed for about 5,000 miles now. I have 71,900 miles on my truck. SC Performance 91 Octane tune installed. Is this something major, or do I have a minor problem?
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5,528 Posts
Did any codes pop up? Some ***** sounds smoked to me
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18,376 Posts
Sounds like possibly rebuild time. Mine does this once in awhile for some reason also though. Try taking it to speed again tomm of you can and if the same thing happens it's rebuild time!
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I checked for any codes, there were none found, with two attempts, using my Digital Scan Tool, and my SuperChips CORTEX 3950.
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I reloaded the Performance 91 Octane Tune with my SuperChips CORTEX 3950. I will drive it again tomorrow to see if this made any difference. I didn't make any advanced changes to the transmission. I moved the shifter thru the range from park down to low, back up to park, everything was normal without any unusual noises.
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4,594 Posts
I had my local Dodge dealer install a new 3500 Trans. oil cooler, and a new deep trans. oil pan. At the same time the trans. filters, and fluid was replaced using factory fluid, and 4x4 filters, due to the deep trans oil pan. This was done 1,723 miles ago.
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8,762 Posts
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Hope all is ok
. 72K miles doesn't seem like much for major problems even on these 'weak sister' transmissions unless you trash the hell out of your tranny on a frequent basis :facepalm: - but it appears you certainly take above average care of your truck.:GoodLuck1:
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20,323 Posts
The 545RFE really doesn't like those high speed down shifts... ouch..
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I have mostly owned GM trucks, never had a problem putting the pedal to the floor at any speed, so I wasn't expecting a problem like this with my truck. I don't abuse my truck, and it is the fastest truck I have owned. I plan to take it to my local dealer service center to see if they can pull any trans codes, and hoping it is something electrical, and an easy fix, otherwise I see a new HD trans going in soon. I wasn't able to drive it the other day, so I will drive it soon to see if there has been a change since I reloaded the tune.
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Returned my truck back to stock tune, delivered to my local dealer to diagnose the problem. They did a quick scan, found a problem code for 4th gear. When I drove it to them I reached 50 MPH and the engine revved up as if in neutral. I slowed to 45 MPH and it down shifted/upshifted several times until I had driven about a mile, held ok at 50 MPH until I reached the dealer, about 6 miles. Hoping it is a sensor, or something not to expensive.
. I slowed to 45 MPH and it down shifted/upshifted several times until I had driven about a mile, held ok at 50 MPH until I reached the dealer, about 6 miles. Hoping it is a sensor, or something not to expensive.
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18,376 Posts
Not likely
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20,323 Posts
Good luck, sounds OD is gone....
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When I drove it to them I reached 50 MPH and the engine revved up as if in neutral
I know this all to well :hide:
Time for a new trans
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4,594 Posts
Dealer called me this afternoon, said my transmission has lost 4th gear, so they recommend I have the tranny rebuilt, or purchase a Chrysler remanufactured tranny:cry2:. I plan to get the cost of a new tranny, their remanufactured tranny, and what they will charge me to install, and service a tranny I provide them with to install.
I found a company called Smart Parts, who has remanufactured, performance built trannys, with the torque converter included, for $1,479.00 Core charge of $300.00, and shipping both ways for $300.00. I would be getting a stronger transmission than stock. Now to find a way to pay for the tranny, install, and service.
I also found one by ATS for $5,594.32 shipped, $1,400.00 core charge, which leaves $4,194.72 plus the cost of install, and service. I know I can't afford that price.
, so they recommend I have the tranny rebuilt, or purchase a Chrysler remanufactured tranny:cry2:. I plan to get the cost of a new tranny, their remanufactured tranny, and what they will charge me to install, and service a tranny I provide them with to install. I found a company called Smart Parts, who has remanufactured, performance built trannys, with the torque converter included, for $1,479.00 Core charge of $300.00, and shipping both ways for $300.00. I would be getting a stronger transmission than stock. Now to find a way to pay for the tranny, install, and service.
I also found one by ATS for $5,594.32 shipped
, $1,400.00 core charge, which leaves $4,194.72 plus the cost of install, and service. I know I can't afford that price.
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18,376 Posts
ATS has lifetime warranty doesn't it though. Tow the truck to me free install! Have two trans in the garage right now that are good lol I'm sure there owners would sell for a little cash maybe not sure!
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ATS has a 5 year, 500,000 mile warranty. The Smart Parts Performance Tranny has a 3 year, 36,000 mile warranty. I will research my options and let ya know. My main problem is raising the money to cover this expense.
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Both are good options for there prices!
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Went to my local Dodge KIA Dealership, to get the prices to fix my truck. To rebuild my transmission $5,244.99, a remanufactured Chrysler trans. will run $5,724.91.
I emailed Smart Parts Auto about their remanufactured performance trans. with torque converter, priced at $2069.00, after core refund $1,769.00, plus about another grand for the install, trans. fluid, and tax. Should have one on its way this week.
I emailed Smart Parts Auto about their remanufactured performance trans. with torque converter, priced at $2069.00, after core refund $1,769.00, plus about another grand for the install, trans. fluid, and tax. Should have one on its way this week.
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