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Torqueflite transmissions: lockup torque converter |
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CB400F 
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Joined: Mar/28/2010 Status: Offline Points: 24 |
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 Topic: Torqueflite transmissions: lockup torque converterPosted: Mar/19/2014 at 11:45am |
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Wiki Says - In 1978, most Torqueflite transmissions gained a lockup torque converter clutch
RE: 1979 AMC Concord with 6 cyclinder Lockup? Model Number? Thanks |
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purple72Gremlin
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Posted: Mar/19/2014 at 5:02pm |
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1979 only the 304 with 998 got LU. 1979 904s which wss 6 cylinder, non LU. This is according to the 1979 TSM I have. And the 1st and second gear ratio is NOT the lower ratios, that didnt come out until 1982. Dont let anyone tell you otherwise. This is assuming stock and original. If the trans has been swapped, or rebuilt and modified, all bets are off
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carnuck
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Posted: Mar/19/2014 at 11:15pm |
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The Eagles got lockups the first couple years. I had to plug the tube on top my valvebody of my '83 wagon's 998 because the converter lockup was slipping so bad. It got me another year's running before the converter died and I went looking for a Wagoneer/Cherokee 727 to put in.
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CB400F
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Posted: Mar/21/2014 at 11:46am |
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Ok...thanks to both.
I did a little scratching, and found these articles below. Of all the rear wheel Torqueflites, did they ever change bell-housing bolt pattern? Mopar Trans ID Guide: Photography by Marko Radielovichttp://www.carcraft.com/newlook/crc_act/116_0302_trans/viewall.html The Legendary Chrysler-Plymouth-Dodge Torqueflite automatic transmission |
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CB400F
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Posted: Mar/21/2014 at 11:58am |
"Introduced in 1960, the light-duty TorqueFlite came in three basic designations--the 904, 998, and 999. The 904 was equipped with three direct friction plates, the 998 had four, and the 999 came with either four or five. They are otherwise dimensionally identical, and beginning in 1980 all were offered with a low gear set (2.74 First and 1.54 Second) as standard equipment http://www.carcraft.com/newlook/crc_act/116_0302_trans/viewall.html |
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1970390amx
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Posted: Mar/21/2014 at 12:36pm |
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as was stated earlier I would visually check it to confirm lock up or not, I have built a bunch of torque filites that started life as a lock up that are no longer lock ups. The lock up converters were a piece of junk. Maybe use of synthetic atf may help them.
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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box |
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purple72Gremlin
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Posted: Mar/21/2014 at 6:16pm |
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On AMC it was 1982.
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CB400F
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Posted: Mar/21/2014 at 7:27pm |
Radiator must be in good condition, along with a working clutch fan (if applicable), especially when in hilly terrain and/or hot weather. In early days, even GMs lockups failed...with heat taking them out...later day GMs, like 4L60E, used PWM to reduce failures. Sidebar - Around 2002, I took a 1982 Caprice with 200R4 from Kansas to Salem, Or., and back over several mountain passes, but before I left, I replaced the radiator and fan clutch. Twenty year old vehicle with some 150K miles, and original transmission. |
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CB400F
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Posted: Mar/21/2014 at 7:32pm |
I see in Wiki on AMC Concord that for 1981, they listed fuel economy. For a six cylinder with auto, getting 26 mpg at 55 mph is quite good; my 1968 American, with 199 six and 3-speed stick, could get that mileage with radial tires. So, if mileage is true, it might suggest lockups were used in 1981. The biggest change for the 1981 Concord was the availability of a 4-cylinder engine, the 151 cu in (2.5 L) GM Iron Duke engine. The 258 cu in (4.2 L) I6 was redesigned for 1981 with an aim to shed weight. Fuel economy figures for the 49 states in 1981 were
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carnuck
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Posted: Mar/21/2014 at 7:52pm |
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They also had the Audi 2.0L 78-79 (not in Eagles)
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purple72Gremlin wrote: