Question about dodge transmissions?
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Lead Driver
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From: Rhode Island
Question about dodge transmissions?
I've heard some good things about their older 727/TorqueFlite transmission, and that their newer transmissions are basically based on the 727, like ford's new 6 speed and the old C6.
My question is, what exactly did chrysler screw up so badly that caused reliability to drop so much? Increase in engine power without an increase in transmission? A flaw designed intentionaly?
My question is, what exactly did chrysler screw up so badly that caused reliability to drop so much? Increase in engine power without an increase in transmission? A flaw designed intentionaly?
Post Fiend
Joined: Oct 2003
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From: Western Central NV
The 90s first overdrive autos where built off the 727. They were fine except with the diesel & V10s because of their torque. If the Cummins was left stock they held up pretty well. The real problem was people started cranking up the power of the Cummins. I have a friend with a 12 valve Cummins putting out over 650 ft lbs of torque. With well over 350 HP. He built his tranny with a BANKS System.
Post Fiend
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From: Running Springs CA
There was a lubrication problem when they modified the Torqueflite to have an overdrive gear, too small oil passage or something like that.
All of the "big 2.5" screwed up when they tried to make automatics get better fuel economy. The C-6, A-727 and TH-400 were all super-reliable, the 727 best of the bunch, and simplest, no vacuum modulator system. Adding lockup converters, overdrive gears and computer solenoids ruined all of them. My E4OD was not a modified C-6, but a new design that took Ford way too long to fix. GM actually had the most reliable of the newer automatics, the 4L80E.
Jim
All of the "big 2.5" screwed up when they tried to make automatics get better fuel economy. The C-6, A-727 and TH-400 were all super-reliable, the 727 best of the bunch, and simplest, no vacuum modulator system. Adding lockup converters, overdrive gears and computer solenoids ruined all of them. My E4OD was not a modified C-6, but a new design that took Ford way too long to fix. GM actually had the most reliable of the newer automatics, the 4L80E.
Jim
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Lead Driver
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From: Rhode Island
Interesting. Odd how doing something relatively simple to a transmission, bolting the over drive portion onto the back, but not paying attention to something as simple as oil flow, just seems so rediculous, you have to wonder what was going through the engineers minds
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Posting Guru
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From: Malvern, Ohio
Ok, on the newer transmissions motor parts made 518(727OD) and 500(904OD) there was a lubrication problem like mentioned prior to my post. The rear of the trans didnt get enough fluid so it burned up faster. There is a company out there that enlarges the lubrication hole in the rear shaft of these transmissions they sell or rebuild to oil the rear OD unit efficiently. V10s and Diesels I think the 47RH is the model they used. Probably some other models but, the lack of lubrication is the big reason why they died early.
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in the last 25 years of driving and owning taxi cabs and delivery trucks ive never had a dodge transimssion worth the metal it was made out of i do not recall any dodge transmission that was any good.. FOrd has always made the best transmission and that is evidenced by the sales numbers and look at any large fleet.. unless its a city being cheap most municipalities use ford vehicles
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Joined: Jun 2005
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From: Somewhere in da corn,Iowa
They don't have a big enough trans. cooler on them. My buddy got a Cummins auto for and we put a bigger tranny cooler on it, no problem. My uncles Ram Shortbed Magnum we did the same thing to and beat the h*ll out of it, ran like a champ up till 195k when we toasted the motor.
I've heard the same thing from a lot of guys, put a bigger tranny cooler, cuz they usually get too hot and don't have sufficient surface area on the stock coolers to compensate for it.
I've heard the same thing from a lot of guys, put a bigger tranny cooler, cuz they usually get too hot and don't have sufficient surface area on the stock coolers to compensate for it.
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From: Marion, VA
Originally Posted by ranger1999 Bob
in the last 25 years of driving and owning taxi cabs and delivery trucks ive never had a dodge transimssion worth the metal it was made out of i do not recall any dodge transmission that was any good.. FOrd has always made the best transmission and that is evidenced by the sales numbers and look at any large fleet.. unless its a city being cheap most municipalities use ford vehicles
Lead Driver
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From: in the woods of MA
I'm no expert on the newer mopar trannies, but way back (60's) the Torqueflights were absolutely indestructible. I had a somewhat modified 318 in a 63 Polara with the push button automatic, I used to take that thing in a parking lot, put the pedal right to the floor, and then punch 1st, reverse, 1st, reverse... for a long, long time. We called it "playing Aurthur Godfrey" as there was a tv commercial where he talked while a guy in the a dodge it the background did that. I once punched reverse as I was going done the road at about 30 mph and mashed the accelerator to the floor. It did the shift and damn near spun the tires off the rims. When I last saw that car (long time ago!) it had over 200K miles on it, and that tranny and it was still running fine...
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